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  • 1. Andersson, Camilla
    et al.
    Ekman, Annica
    Forsberg, Bertil
    Grennfelt, Peringe
    IVL Svenska Miljöinstitutet.
    Gruzieva, Olena
    Hansson, Hans-Christen
    Karlsson, Per Erik
    IVL Svenska Miljöinstitutet.
    Lagner, Joakim
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Munthe, John
    IVL Svenska Miljöinstitutet.
    Pleijel, Håkan
    Segersson, David
    Stockfelt, Leo
    Åström, Stefan
    IVL Svenska Miljöinstitutet.
    Achievements and experiences from science–policy interaction in the field of air pollution: Synthesising 20 years of research and outreach,thinking about future needs2021Rapport (Annet vitenskapelig)
    Abstract [en]

    For 20 years, the Swedish Environmental Protection Agency together with the MISTRA research foundation have funded five air pollution research programmes with focus on producing knowledge that supports policy and emission control in national and international arenas. The research has been multidisciplinary and has included research on emissions, atmospheric transport and transformation processes, human health effects, ecosystem effects, and emission control strategies. Research has also been conducted on the interaction between air pollution and climate change.

    Over these years, the link between the research programmes and the development of emission control strategies and policies in Sweden, the EU, and the UNECE Air Convention has been of high importance. This report presents how the research programmes have created societal benefits through support for the development of air pollution policies and emission control measures. The report also identifies future research needs to ensure continued progress towards even better air quality for future generations.

    Fulltekst (pdf)
    fulltext
  • 2. Belyazid, Salim
    et al.
    Akselsson, Cecilia
    Hellsten, Sofie
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Munthe, John
    IVL Svenska Miljöinstitutet.
    Modellering som verktyg vid miljöbedömning för uttag av skogsbränslen - En metodstudie2010Rapport (Annet vitenskapelig)
    Abstract [sv]

    Se själva rapporten för sammanfattningen

    Fulltekst (pdf)
    FULLTEXT01
  • 3. Belyazid, Salim
    et al.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Using ForSAFE-Veg to investigate the feasibility and requirements of setting critical loads for N based on vegetation change - pilot study at Gårdsjön2009Rapport (Annet vitenskapelig)
    Abstract [sv]

    The dynamic integrated ecosystem model ForSAFE-Veg was applied at the intensively monitored experimental catchment Gårdsjön, with the aim to investigate the performance of the model and the feasibility of using the composition of the ground vegetation community as an indicator of potential change due to N deposition. The quality, long term, and integrity of the measured data provided an ideal testing opportunity for evaluating the performance of the model, which proved satisfactory. The study shows that it is feasible to use the composition of the ground vegetation community as a biological indicator of ecosystem change. Yet, to be used in estimating critical loads of nitrogen (N) deposition, the biological indicator has to be simplified into a single-dimensional variable referred to as the average yearly exceedance (of change in the composition of the ground vegetation). The study shows that setting conditions to protect the dominant segment of the plant community, and thereby protecting ecosystem services, will also result in protecting the marginal plants proportion at the site. However, the choice of the segment of the plant community to be protected and the acceptable level of change remain bound to social preferences

    Fulltekst (pdf)
    FULLTEXT01
  • 4. Belyazid, Salim
    et al.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Using ForSAFE-Veg to investigate the feasibility and requirements of setting critical loads for N based on vegetation change - pilot study at Gårdsjön2009Rapport (Annet vitenskapelig)
    Abstract [sv]

    The dynamic integrated ecosystem model ForSAFE-Veg was applied at the intensively monitored experimental catchment Gårdsjön, with the aim to investigate the performance of the model and the feasibility of using the composition of the ground vegetation community as an indicator of potential change due to N deposition. The quality, long term, and integrity of the measured data provided an ideal testing opportunity for evaluating the performance of the model, which proved satisfactory. The study shows that it is feasible to use the composition of the ground vegetation community as a biological indicator of ecosystem change. Yet, to be used in estimating critical loads of nitrogen (N) deposition, the biological indicator has to be simplified into a single-dimensional variable referred to as the average yearly exceedance (of change in the composition of the ground vegetation). The study shows that setting conditions to protect the dominant segment of the plant community, and thereby protecting ecosystem services, will also result in protecting the marginal plants proportion at the site. However, the choice of the segment of the plant community to be protected and the acceptable level of change remain bound to social preferences

    Fulltekst (pdf)
    FULLTEXT01
  • 5.
    Hansen, Karin
    et al.
    IVL Svenska Miljöinstitutet.
    Akselsson, Cecilia
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Langner, Joakim
    Base cation deposition to forest in Europe2013Rapport (Annet vitenskapelig)
    Abstract [sv]

    Sammanfattning Deposition av baskatjoner utgör en betydande källa till baskatjonförrådet i skogsmark och är en viktig parameter för att kvantifiera kritisk belastning och överskridande, liksom för att prediktera återhämtning från försurning. På senare tid har baskatjonbalansen i skogsmark diskuterats allt mer, på grund av de ökade förlusterna av baskatjoner till följd av ökat uttag av avverkningsrester (grenar, toppar och stubbar) för att producera förnybar energi. Det är viktigt att kunna mäta eller beräkna baskatjondepositionen till skog med någorlunda hög noggrannhet. Under 1980- och 90-talen pågick mycket arbete för att förbättra uppskattningarna av baskatjondeposition till skogen. Därefter har insatserna på området varit mer begränsade.  En workshop anordnades 21-22 november 2012, för att få en överblick över den senaste utvecklingen och framstegen inom området. I denna rapport summeras resultaten från workshopen. Vikten av att kombinera olika metoder för att mäta eller beräkna baskatjondepositionen betonades. Modellering av baskatjondeposition på Europanivå sågs som önskvärt och möjligt att genomföra, och en uppdelning mellan olika källor för att underlätta arbetet (antropogena källor, havssalt och andra naturliga källor) föreslogs. Fortsatt samarbete på Europanivå skulle vara fördelaktigt och bör främjas, och olika sätt för att få det till stånd diskuterades.

    Fulltekst (pdf)
    FULLTEXT01
  • 6.
    Hansen, Karin
    et al.
    IVL Svenska Miljöinstitutet.
    Kronnäs, Veronika
    IVL Svenska Miljöinstitutet.
    Sahlén Zetterberg, Therese
    IVL Svenska Miljöinstitutet.
    Setterberg, Margareta
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Pettersson, Per
    Munthe, John
    IVL Svenska Miljöinstitutet.
    DiVa - Dikesrensningens effekter på vattenföring, vatten­kemi och bottenfauna i skogsekosystem2013Rapport (Annet vitenskapelig)
    Abstract [sv]

    Stora arealer av Sveriges dikade skogsmark har diken som är eftersatta. Kunskapen om vilken effekt en dikesrensning har på ökad tillväxt samt dikenas vattenföring, vattenkvalité och bottenfauna är obefintlig. DiVa projektet (Dikesrensningens effekter på vattenekosystem) sattes i verket för att belysa effekterna av dikesrensning och öka kunskapen och processförståelsen kring effekterna på bottenfauna och vattenkemi. DiVa projektet har pågått sedan 2007 i två faser, 3 respektive 2 år. Två områden i Sverige valdes ut: Fagerheden utanför Piteå i Norrbottens län och Unnaryd i Jönköpings län i södra Sverige. I varje försöksområde utfördes dikesrensningen i två diken. Olika maskintyper användes i de två områden. Ett dike rensades med normala hänsynsåtgärder medan ett annat rensades under förhöjda hänsynsåtgärder. Ett dike lämnades orört som referens. Dikesrensningen med normal hänsyn innebar att en översilningsmark anlades nedströms den rensade sträckan, samt att nästan hela diket rensades, nerifrån och upp. Dikesrensningen med ökad hänsyn innebar, förutom översilningsmark nedströms dikena, även att mindre proppar och små slamfickor och/eller översilningsmarker längs diket skapades, samt att orensade partier lämnades. Efter mätningar i en inledande period på 1-2 år genomfördes dikesrensning och vattenkemin registrerades löpande under 1-2 år efter åtgärden, medan bottenfaunan inventerades på våren och hösten varje år.

    Fulltekst (pdf)
    FULLTEXT01
  • 7.
    Hansen, Karin
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Hultberg, Hans
    IVL Svenska Miljöinstitutet.
    Lidqvist, Mattias
    IVL Svenska Miljöinstitutet.
    FUTMON Avrapportering av mätdata från 20102011Rapport (Annet vitenskapelig)
    Abstract [sv]

    IVL Svenska Miljöinstitutet AB redovisar resultat av mätningar utfört under den svenska delen av FUTMON programmet "Further Development and Implementation of an EU-level Forest Monitoring System" på uppdrag av SLU. FUTMON nätverket består av 4 Integrated Monitoring (IM) ytor och 8 skogsytor i anslutning till IM ytorna. I uppdraget har ingått att utföra mätningar under 2010, datasammanställning, granskning och kvalitetssäkring, utvärdering och rapportering av resultaten. Provtagning av krondropp, förnafall,avrinningsvatten och klimatparametrar som temperatur och luftfuktighet genomfördes under2010.Redovisning av mätningar i följande skogsytor finns i rapporten: Aneboda IM, Asa Sandbäcken, Asa Ängavägen, Kindla IM, Kindla Buskbäcken, Kindla Bohyttan, Gammtratten IM, Gammtratten Balån Nord, Gammtratten Risbäcken, Gårdsjön F1 IM, Gårdsjön F2 och GårdsjönF3. Endast mätningar som gjordes inom FUTMON rapporteras.

    Fulltekst (pdf)
    FULLTEXT01
  • 8.
    Hansen, Karin
    et al.
    IVL Svenska Miljöinstitutet.
    Rosenqvist, Lars
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Ecosystem services from small forest fragments in agricultural landscapes2016Inngår i: Current Forestry Reports, ISSN 2198-6436, Vol. 2, s. 30-44Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In Europe, like in many temperate lowlands worldwide, forest has a long history of fragmentation and land use change. In many places, forest landscapes consist of patches of different quality, age, size and isolation, embedded in a more or less intensively managed agricultural matrix. As potential biodiversity islets, small forest patches (SFP) may deliver several crucial ecosystem services to human society, but they receive little attention compared to large, relatively intact forest patches. Beyond their role as a biodiversity reservoir, SFP provide important in situ services such as timber and wild food (game, edible plants and mushrooms) production. At the landscape scale, SFP may enhance the crop production via physical (obstacle against wind and floods) and biological (sources of pollinators and natural enemies) regulation, but may, on the other hand, also be involved in the spread of infectious diseases. Depending on their geographic location, SFP can also greatly influence the water cycle and contribute to supply high-quality water to agriculture and people.

    Globally, SFP are important carbon sinks and are involved in nutrient cycles, thus play a role in climate change mitigation. Cultural services are more related to landscape values than to SFP per se, but the latter may contribute to the construction of community identity. We conclude that SFP, as local biodiversity hotspots in degraded landscapes, have the potential to deliver a wide range of ecosystem services and may even be crucial for the ecological intensification of agroecosystems. There is thus an urgent need to increase our knowledge about the relationships between biodiversity and ecosystem services delivered by these SFP in agricultural landscapes.

  • 9.
    Hellsten, Sofie
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Nordic nitrogen and agriculture - Policy, measures and recommendations to reduce environmental impact2017Rapport (Annet vitenskapelig)
    Abstract [en]

    Increasing attention is now given, nationally and internationally, to the importance of understanding and managing other global cycles of elements in addition to carbon, including nitrogen. Work on planetary boundaries has identified overloading the nitrogen cycle as one of the most critical problems. A particular challenge is that reactive nitrogen (Nr) is involved in a cascade of different environmental effects, from local air pollution to eutrophication, acidification and climate change. These problems are often managed by different and not always coordinated policies and instruments. Recent studies and projects, such as the European Nitrogen Assessment, and newly initiated projects by the OECD, have looked at how more coherent and integrated policies could be better targeted and more cost-effective. The Convention on Long-Range Transboundary Air Pollution (CLRTAP) has established a Task Force on Reactive Nitrogen (TFRN) to look scientifically at the whole cycle of reactive nitrogen, as a background for policy development.

    The use of fertiliser in agriculture, together with NOx from fossil fuel combustion, is a major anthropogenic source of reactive nitrogen, and requires special attention and analysis; around two thirds or more of Nr from human sources is related to agriculture, from fertiliser, fixation by crop plants or feed imports.

    This report builds on earlier work by the Nordic Council of Ministers on these issues, in particular TemaNord2015:570 “Nordic agriculture air and climate”, and is also a follow-up of TemaNord2013:558 “Agriculture and environment in the Nordic countries”.

    The report provides an overview of main sources, pathways and impacts of reactive nitrogen in the Nordic countries, including knowledge gaps. It reviews ongoing national and international policy efforts to control reactive nitrogen, and looks at trends and developments, including results of control policies, in flows of reactive nitrogen in the Nordic countries.

    On this basis the report suggests further work to close knowledge gaps, and recommends possible control strategies and policy instruments for reactive nitrogen, in order to design and implement better integrated, more effective and more cost-effective policies.

    Fulltekst (pdf)
    FULLTEXT01
  • 10.
    Hellsten, Sofie
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Dalgaard, T.
    Rankinen, K.
    Törseth, K.
    Bakken, L.
    Bechmann, M.
    Kulmala, A.
    Olofsson, S.
    Piil Pira, K.
    Turtola, E.
    Abating N in Nordic agriculture – policy, measures and way forward2019Inngår i: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 236, s. 674-686Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    During the past twenty years, the Nordic countries (Denmark, Sweden, Finland and Norway) have introduced a range of measures to reduce losses of nitrogen (N) to air and to aquatic environment by leaching and runoff. However, the agricultural sector is still an important N source to the environment, and projections indicate relatively small emission reductions in the coming years. The four Nordic countries have different priorities and strategies regarding agricultural N flows and mitigation measures, and therefore they are facing different challenges and barriers. In Norway farm subsidies are used to encourage measures, but these are mainly focused on phosphorus (P). In contrast, Denmark targets N and uses control regulations to reduce losses. In Sweden and Finland, both voluntary actions combined with subsidies help to mitigate both N and P. The aim of this study was to compare the present situation pertaining to agricultural N in the Nordic countries as well as to provide recommendations for policy instruments to achieve cost effective abatement of reactive N from agriculture in the Nordic countries, and to provide guidance to other countries. To further reduce N losses from agriculture, the four countries will have to continue to take different routes. In particular, some countries will need new actions if 2020 and 2030 National Emissions Ceilings Directive (NECD) targets are to be met. Many options are possible, including voluntary action, regulation, taxation and subsidies, but the difficulty is finding the right balance between these policy options for each country. The governments in the Nordic countries should put more attention to the NECD and consult with relevant stakeholders, researchers and farmer's associations on which measures to prioritize to achieve these goals on time. It is important to pick remaining low hanging fruits through use of the most cost effective mitigation measures. We suggest that N application rate and its timing should be in accordance with the crop need and carrying capacity of environmental recipients. Also, the choice of application technology can further reduce the risk of N losses into air and waters. This may require more region-specific solutions and knowledge-based support with tailored information in combination with further targeted subsidies or regulations.

  • 11.
    Jutterström, Sara
    et al.
    IVL Svenska Miljöinstitutet.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Swedish National Nitrogen Budget – Forest and semi-natural vegetation2020Rapport (Annet vitenskapelig)
    Abstract [en]

    This report describes the flow of reactive nitrogen for forests and semi-natural vegetation in Sweden according to the methodology developed within the framework of the Task Force on Reactive Nitrogen (TFRN). Forest and semi-natural vegetation (FS) constitute one out of 8 pools for the Swedish National Nitrogen Budget. The FS pool is divided into the three compartments; forest, wetland and other land. Together they amount to 71% of the country area.

    The data used has been collected from Swedish official statistics and reports and are representative for year 2015 whenever possible.

    In total, the FS pool has inflows of reactive nitrogen of 175.8 kilotonnes (kt) and outflows of 188.6 kt. The largest inflow is from atmospheric deposition (99.3 kt) and the largest outflow is via leaching/runoff (67.4 kt). Forestry is a major industry in Sweden and the nitrogen flow from the forest due to harvest is the second largest outflow from the FS-pool (58.5 kt). Biological fixation of nitrogen is an important inflow for both forest (39.5 kt) and wetland (32.1 kt). Other land (which mostly consists of mountains) is of smaller quantitative importance and only has two flows: leaching/runoff and deposition (2.9 kt N and 2.9 kt N, respectively).

    Fulltekst (pdf)
    FULLTEXT01
  • 12. Lövblad, Gun
    et al.
    Persson, Christer
    Klein, Thomas
    Ruoho-Airola, Tuija
    Hovmand, Mads
    Tarrason, Leonor
    T¢rseth, Kjetil
    Larssen, Thorbjörn
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Rapp, Lars
    The deposition of base cations in the Nordic countries2004Rapport (Annet vitenskapelig)
    Abstract [sv]

    Base cation deposition from the atmosphere provides, together with weathering, ions for neutralising acidity and, after sufficient reductions of acidifying deposition, a source for replenishing lost base cation pools. In the integrated assessment modelling to support the strategies of pollution abatement, a need for base cation data over Europe has been expressed. Data are needed by the scientists working with acidification effects and recovery of ecosystems. A study has been made on a procedure for mapping base cation deposition over the Nordic countries, with an additional aim of recommendations for base cation mapping on a European scale. The mapping over the Nordic countries was made using the data assimilation part of the MATCH model, run with a resolution of 11x11 km. The mapping was based on monitoring data for concentrations of base cations in air and precipitation in the Nordic and surrounding countries.The influence of base cation deposition in the calculation of critical loads and their exceedance as well as for the dynamic modelling of recovery processes was analysed and base cation deposition was found to be of significant importance. For dynamic modelling, the influence of base cation deposition is less important when using models, which are calibrated with monitoring data. However, in prognoses for the future, it is still very with accurate estimates of the base cation deposition. The procedure for mapping base cation deposition proposed in this project represents an improvement with respect to many previous mapping exercises, because it includes both wet and dry estimates of base cation deposition, and because it handles the decreasing sea salt gradients from the coast towards inland. It is recommended in the report to use the experiences from this Nordic mapping activitiy to initiate a process to compile necessary monitoring and emission data in order to carry out a mapping procedure of base cation deposition at European level.

    Fulltekst (pdf)
    FULLTEXT01
  • 13.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Effects of ground surface permeability on the growth of urban linden trees2018Inngår i: Urban Ecosystems, ISSN 1083-8155, E-ISSN 1573-1642Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Street trees are an important part of urban vegetation due to their provisioning of different types of ecosystem services such as local climate regulation and contribution to aesthetical and recreational values. In order to provide these services, urban trees need to endure many stress factors not present in natural environments, such as the widespread use of impervious surfaces in the vicinity of street trees. However, few studies have evaluated the effect of this potential stress factor on urban tree growth.

    The aim of this study was therefore to investigate how ground surface permeability affects stem and current-year shoot growth of linden (Tilia europaea) street trees in Gothenburg, Sweden. We found that a small fraction of permeable ground surface in the vertically projected tree crown area caused lower stem growth and strongly suppressed current-year shoot growth. This finding can guide future city planning, demonstrating that the vitality of street trees is compromised when the permeable surface area in the vicinity of the tree is small.

  • 14.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Variability in organic carbon reactivity across lake residence time and trophic gradients2018Inngår i: Nature Geoscience, ISSN 1752-0894, E-ISSN 1752-0908Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The transport of dissolved organic carbon from land to ocean is a large dynamic component of the global carbon cycle. Inland waters are hotspots for organic matter turnover, via both biological and photochemical processes, and mediate carbon transfer between land, oceans and atmosphere. However, predicting dissolved organic carbon reactivity remains problematic. Here we present in situ dissolved organic carbon budget data from 82 predominantly European and North American water bodies with varying nutrient concentrations and water residence times ranging from one week to 700 years.

    We find that trophic status strongly regulates whether water bodies act as net dissolved organic carbon sources or sinks, and that rates of both dissolved organic carbon production and consumption can be predicted from water residence time. Our results suggest a dominant role of rapid light-driven removal in water bodies with a short water residence time, whereas in water bodies with longer residence times, slower biotic production and consumption processes are dominant and counterbalance one another. Eutrophication caused lakes to transition from sinks to sources of dissolved organic carbon. We conclude that rates and locations of dissolved organic carbon processing and associated CO2 emissions in inland waters may be misrepresented in global carbon budgets if temporal and spatial reactivity gradients are not accounted for.

  • 15.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Andersson, Camilla
    SMHI.
    Leung, Wing
    SMHI.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Swedish National Nitrogen Budget - Atmosphere2022Rapport (Fagfellevurdert)
    Abstract [sv]

    I denna rapport presenteras pool 7 ”Atmosfär” (AT) som ingår i Sveriges nationella kvävebudget (National Nitrogen Budget, NNB).

    Atmosfärspoolen i Sveriges NNB är en av de totalt 8 pooler som definierats av Task Force on Reactive Nitrogen (TFRN) som tillsammans representerar en komplett nationell kvävebudget.

    En fullständig NNB innefattar en kvantifiering av alla större flöden av alla former av reaktivt kväve (Nr) inom landet och över landsgränserna.

    Metoden för att beräkna NNB har tillhandahållits av expertpanelen för kvävebudgetar (Expert Panel on Nitrogen Budgets, EPNB) i bilagorna till ECE/EB.AIR/119 – "Guidance document on national nitrogen budgets".

    De största flödena av Nr till och från de troposfäriska luftmassorna ovanför Sverige, inklusive de svenska nationella kustvattnen, beräknades för år 2015.

    Förutom en mindre mängd Nr som genereras av blixtar domineras den atmosfäriska Nr-poolen av fyra huvudflöden: import och export av Nr från gränsöverskridande transport; svenska utsläpp av Nr; och atmosfäriskt nedfall.

    Den huvudsakliga källan till utsläppsdata har varit den officiella svenska rapporteringen till Centre on Emission Inventories and Projections (CEIP) under luftkonventionen (Convention on Long-range Transboundary Air Pollution, CLRTAP).

    För det reaktiva kvävedenedfallet i Sverige användes de officiella nationella beräkningarna från MATCH Sverigesystemet.Resultaten visar att Sverige under 2015 var en nettoimportör av luftföroreningar i form av Nr, det vill säga att importen av Nr från utsläppskällorna utanför landet (139 kt N) var större än exporten (96,1 kt N). De svenska utsläppen av Nr 2015 var totalt 117 kt N.

    De största utsläppen kommer från två sektorer: Jordbruk (43,4 kt N) och Energi & Bränsle (40,6 kt N). Depositionen av Nr på svenska ekosystem år 2015 var 160 kt N, varav 87 procent härrörde från utsläppskällor utomlands.

    Fulltekst (pdf)
    fulltext
  • 16.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Cosby, Bernard J
    Wright, Richard F
    Modelling the role of nitrogen in acidification of Swedish lakes: future scenarios of acid deposition, climate change and forestry practices2009Rapport (Annet vitenskapelig)
    Abstract [sv]

    There are three major drivers that can cause future changes in lake water chemisty: air pollution, land use and climate change. In this report we used an extensive set of Swedish lakes sampled in 1995, 2000 and in 2005 to model future lake water chemistry under 5 different scenarios. The base case scenario represented deposition of air pollutants under current legislation (CLE); that is assuming that emissions of sulphur (S) and nitrogen (N) will be reduced as currently agreed by the Gothenburg protocol, NEC directive and other legislation. After the agreed emission reductions were achieved, no further reduction in deposition was assumed and deposition was maintained constant up to year 2100. The base scenario assumed no change in current forestry practices and no climate change. A second other deposition scenario was based on maximum (technically) feasible emission reduction (MFR). The MFR scenario also did not assume change of either forestry practices or climate. A maximum biomass harvest was modelled (land use, LU, scenario), which entailed harvest of tree stems, slash and stumps. A scenario of climate change (CC) followed the IPCC A2 scenario downscaled to Sweden by SMHI. Finally climate change and land use were combined (CCLU scenario). The CC, LU and CCLU scenarios were driven by the 'current legislation' (CLE) deposition scenario for S and N deposition. The biogeochemical model MAGIC was used in this project, and scenarios were evaluated up to year 2100. Special attention was paid to the impact of the future scenarios on N leaching.

    Fulltekst (pdf)
    FULLTEXT01
  • 17.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Heuck, C
    Smolka, G
    Whalen, ED
    Frey, S
    Gundersen, P
    Fernandez, IJ
    Spohn, M
    Effects of long-term nitrogen addition on phosphorus cycling in organic soil horizons of temperate forests2018Inngår i: Biogeochemistry, ISSN 0168-2563, E-ISSN 1573-515XArtikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    High atmospheric nitrogen (N) deposition is expected to impair phosphorus (P) nutrition of temperate forest ecosystems. We examined N and P cycling in organic soil horizons of temperate forests exposed to long-term N addition in the northeastern USA and Scandinavia. We determined N and P concentrations, enzyme activities and net N and P mineralization rates in organic soil horizons of two deciduous (Harvard Forest, Bear Brook) and two coniferous (Klosterhede, Ga°rdsjo¨n) forests which had received experimental inorganic N addition between 25 and 150 kg N ha-1 year-1 for more than 25 years. Long-term N addition increased the activity of phosphatase (? 180%) and the activity of carbon (C)- and N-acquiring enzymes (cellobiohydrolase: ? 70%, chitinase: ? 25%). Soil N enrichment increased the N:P ratio of organic soil horizons by up to 150%. In coniferous organic soil horizons, net N and P mineralization were small and unaffected by N addition. In deciduous organic soil horizons, net N and P mineralization rates were significantly higher than at the coniferous sites, and N addition increased net N mineralization by up to 290%. High phosphatase activities concomitant with a 40% decline in P stocks of deciduous organic soil horizons indicate increased plant P demand. In summary, projected future global increases in atmospheric N deposition may induce P limitation in deciduous forests, impairing temperate forest growth.

  • 18.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Heuck, C.
    Smolka, G.
    Whalen, ED.
    Frey, S.
    Gundersen, P.
    Fernandez, IJ.
    Spohn, M.
    Effects of long-term nitrogen addition on phosphorus cycling in organic soil horizons of temperate forests.2018Inngår i: Biogeochemistry, ISSN 0168-2563, E-ISSN 1573-515X, Vol. 2018, nr 141, s. 167–181-Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Effects of long-term nitrogen addition on phosphorus cycling in organic soil horizons of temperate forests. The paper summarize four long-term N-addition experiments from US and from Europe,where Gårdsjön, Sweden is one of the two conifer sites.

  • 19.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    J. Cheng, Susan
    G. Hess, Peter
    R. Wieder, William
    Quinn Thomas, R.
    J. Nadelhoffer, Knute
    Vira, Julius
    L. Lombardozzi, Danica
    Gundersen, Per
    J. Fernandez, Ivan
    Schleppi, Patrick
    Gruselle, Marie-Cécile
    L. Goodale, Christine
    Decadal fates and impacts of nitrogen additions on temperate forest carbon storage: a data–model comparison2019Inngår i: Biogeosciences, ISSN 1726-4170, E-ISSN 1726-4189Artikkel i tidsskrift (Fagfellevurdert)
  • 20.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Jack Cosby, B.
    F. Wright, Richard
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    MAGIC library for Swedish lakes: evaluation of multiple calibrations2013Rapport (Annet vitenskapelig)
    Abstract [sv]

    Den svenska definitionen på antropogen försurning är att pH har sjunkit med 0.4 pH-enheter från förindustriell tid. pH från mitten av 1800-talet uppskattas med hjälp av den dynamiska biogeokemiska modellen MAGIC. Om det inte finns tillräckligt med bakgrundsdata för att modellera kan verktyget MAGIC-biblioteket användas ( www.ivl.se/magicbibliotek ). Sjödelen av MAGIC-biblioteket består av knappt 3000 sjöar i Sverige som har modellerats med MAGIC. Biblioteket har en matchningsrutin som letar fram den sjö i biblioteket som mest liknar den sjö man vill försurningsbedöma. Den pH-förändring som har modellerats fram för sjön i biblioteket antas då även beskriva pH-förändringen i bedömningssjön.

    Fulltekst (pdf)
    FULLTEXT01
  • 21.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Experimental addition of nitrogen to a whole forest ecosystem at Gårdsjön, Sweden (NITREX): Nitrate leaching during 26 years of treatment2018Inngår i: Environmental Pollution, ISSN 1566-0745, Vol. 242, s. 367-374Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Chronic high deposition of nitrogen (N) to forest ecosystems can lead to increased leaching of inorganic N to surface waters, enhancing acidification and eutrophication. For 26 years nitrogen has been added as ammonium nitrate (NH4NO3) at 40kgN ha-1 yr-1 to a whole forested catchment ecosystem at Gårdsjön, Sweden, to experimentally simulate the transition from a N-limited to N-rich state.

    Over the first 10 years of treatment there was an increasing amount of nitrate (NO3-) and to a lesser extent ammonium (NH4+) lost in runoff, but then N leaching stabilised, and for the subsequent 16 years the fraction of N added lost in runoff remained at 9%. NO3- concentrations in runoff were low in the summer during the first years of treatment, but now are high throughout the year. High frequency sampling showed that peaks in NO3- concentrations generally occurred with high discharge, and were enhanced if high discharge coincided with occasions of N addition.

    Approximately 50% of the added N has gone to the soil. The added N is equivalent to 140 years of ambient N deposition. At current ambient levels of N deposition there thus appears to be no immediate risk of N saturation at this coniferous forest ecosystem, and by inference to other such N-limited forests in Scandinavia.

  • 22.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Graae, Lisette
    IVL Svenska Miljöinstitutet.
    Härnwall, Eva-Lena
    IVL Svenska Miljöinstitutet.
    Magnusson, Kerstin
    IVL Svenska Miljöinstitutet.
    Fullskaleförsök av vatten och partikeltransport i en dag- och bräddvattenanläggning Kungälv/Ytterby2018Rapport (Annet vitenskapelig)
    Abstract [sv]

    Kapaciteten att hantera vatten och partiklar vid ett kraftigt punktutsläpp (så kallad bräddning) i en dag- och bräddvattenanläggning har testats i ett fullskaleförsök. En tankbil släppte ut 9 kubikmeter rent vatten med mikroplast, 2 g polyamidpartiklar, i en grop överst i anläggningen. Vattenprover samlades in och filtrerades och partiklarna analyserades i mikroskop. Anläggningen fördröjde effektivt det insläppta vattnet och partikelhalterna minskade mycket kraftigt mellan utsläppet och anläggningens olika delar.

    Fulltekst (pdf)
    FULLTEXT01
  • 23.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Moldanova, Jana
    IVL Svenska Miljöinstitutet.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Effekten av sjöfartens utsläpp av svavel och kväve på överskridande av kritisk belastning för försurning och för övergödning i Sverige2018Rapport (Annet vitenskapelig)
    Abstract [sv]

    Denna rapport redovisar resultat från projektet ”Effekten av sjöfartens utsläpp av svavel och kväve på överskridande av kritisk belastning för försurning och för övergödning i Sverige”, Naturvårdsverkets ärendenummer NV-07751-17. Projektet bygger på ett antal utsläppscenarier med fokus på olika sjöfartsemissionsscenarier. Dessa scenarier har tagits fram inom BONUS SHEBA (Sustainable shipping and Environment of the Baltic Sea region) projektet för åren 2012 och 2040. Rapporten visar hur överskridandet av kritisk belastning för försurning och eutrofiering i Sverige påverkas av sjöfarten.

    Fulltekst (pdf)
    FULLTEXT01
  • 24.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Akujärvi, Anu
    SYKE.
    Forsius, Martin
    SYKE.
    Holmberg, Maria
    SYKE.
    Austnes, Kari
    NIVA.
    de Wit, Heleen
    NIVA.
    Bak, Jesper
    AAU.
    NKL-1915 National Nitrogen Budgets in Scandinavia: consequences for climate change and for eutrophication – synthesis report2024Rapport (Annet vitenskapelig)
    Abstract [en]

    This report presents the results of a project undertaken by Norway, Finland, Sweden, and Denmark related to the National Nitrogen Budget (NNB) with a focus on the NNB pool Forests and semi-natural vegetation (FS). The NNB involves calculations of reactive nitrogen (Nr) inflows and outflows within the FS pool, and the study compares these calculations to reports of carbon sequestration in climate reporting to the United Nations Framework Convention on Climate Change (UNFCCC).Norway and Finland initiated their work on NNB, concentrating on Forests and semi-natural vegetation (FS). The UNECE LRTAP Task Force on Reactive Nitrogen (TFRN) methodology was also used for compiling the FS pool for Denmark, while Sweden had established its FS pool prior to the project.The FS pool comprises three sub-pools: forests, wetlands, and other lands. Inflows of reactive nitrogen (Nr) to the FS pool are primarily from deposition and biological N-fixation, with major outflows being leaching, harvest, and denitrification.In Finland, Sweden, and Denmark, the inflows and outflows are in balance, while in Norway, there is an accumulation of Nr, indicating a surplus of nitrogen. Wetland sub-pools in all four countries and the forest sub-pool in Norway show nitrogen accumulation.All four countries report carbon sequestration in forests to UNFCCC.

    There is a link between nitrogen and carbon cycles, since the organic matter forming the carbon stock in forests and wetlands relies on nitrogen. The origin of nitrogen contributing to the estimated C-stock increase needs further investigation.There is a discrepancy between the calculated nitrogen changes in the FS pool and the nitrogen needed to support reported carbon stock changes. Possible explanations for the discrepancies are re-location of nitrogen within pools, changes in the C/N ratio, expansion of forested areas, and uncertainties in N-fixation rates and denitrification.There is a need for better integration of carbon and nitrogen flux and stock change estimates in natural ecosystems. Understanding the interactions between carbon and nitrogen is deemed crucial for predicting future developments in carbon sequestration and impacts of nitrogen deposition, especially for the Nordic countries with their significant forests playing roles as carbon and nitrogen sinks.

    Fulltekst (pdf)
    fulltext
  • 25.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Holmgren, Kerstin
    Sveriges Lantbruksuniversitet.
    Fölster, Jens
    Sveriges Lantbruksuniversitet.
    Bedömningsgrunder försurning - tester av MAGIC-biblioteket2022Rapport (Fagfellevurdert)
    Abstract [sv]

    IVL Svenska Miljöinstitutet har tillsammans med Sveriges lantbruksuniversitet (SLU) på uppdrag av Havs-och vattenmyndigheten undersökt ett antal frågeställningar angående bedömningsverktyget MAGIC-biblioteket baserade på synpunkter och data från kalkningsansvariga handläggare på länsstyrelserna.

    MAGIC-biblioteket är ett försurningsbedömningsverktyg som gör att sjöar och vattendrag kan bedömas utifrån ett liknande vatten. På det sättet har tiotusentals sjöar och vattendrag bedömts. I samband med bedömningarna har det identifierats ett antal fall där beräknade referensvärden bedömts vara orealistiska utifrån annan kunskap som användarna av MAGIC-biblioteket besitter. Ett utskick gjordes till kalkningsansvariga handläggare på länsstyrelserna där det efterfrågades underlag på sådana objekt där försurningsbedömning med MAGIC-biblioteket anses vara felaktig. Så mycket relevant bakgrundsinformation som möjligt efterfrågades för att möjliga förklaringar till de olika bedömningarna skulle kunna undersökas. Svar kom in från åtta länsstyrelser. Utifrån det insamlade materialet jämfördes MAGIC (Model of Acidification of Groundwater in Catchments)-modellerade objekt och MAGIC-bibliotekets resultat med historiska fiskdata, med uppmätt vattenkemi inklusive trender över tid och en jämförelse med uppmätt och modellerat atmosfäriskt nedfall gjordes.

    I studien jämfördes förekomst av mört från slutet av 1800-talet i Värmland med modellerad vattenkemi. Mört har förekommit i merparten av sjöarna, inklusive sjöar med lågt modellerat pH. Det är dock en tydligt minskande andel sjöar med förekomst av mört ju lägre modellerat pH vattnen har. Detta skiljer sig från till exempel den betydligt mindre försurningskänsliga abborren, där inget samband mellan förekomst och historiskt modellerat pH kunde urskiljas. Sjöar med lågt pH och där mört förekom i slutet av 1800-talet har i genomsnitt högre halt av löst organiskt kol än sjöar med högre pH.

    En jämförelse mellan uppmätta tidsserier från sjöar samt modellerade värden för samma sjö i MAGIC-biblioteket visar att magnituden av den modellerade trenden i många fall större än den observerade trenden. Bilden är inte helt entydig och skillnaderna är större för sulfat än för ANC (syraneutraliserande förmåga), men att modellen överskattar trenden förekommer betydligt oftare än tvärt om. Detta beror till största delen på att det finns en tendens för modellen att överskatta sulfathalten i sjöarna vid den tidpunkt då vattenförekomsterna började provtas. Orsaken till detta kan variera, men korrekt modellering av tidstrender i avrinningen förutsätter att tidsutvecklingen av nedfallet av svavel, kväve och baskatjoner som användes i modelleringen följt verkligheten även på platser och under tidsperioder där det inte finns data att grunda modellberäkningar på.

    Fulltekst (pdf)
    fulltext
  • 26.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Manngård, Bibbi
    Westling, Olle
    Återhämtning av försurad skogsmark med olika uttag av biomassa2001Rapport (Annet vitenskapelig)
    Abstract [sv]

    IVL har beskrivit effekter av fem olika scenarier för framtida skogsbruk under en skogsgeneration på markens och avrinningens återhämtning från försurning. Studien har utförts med hjälp av den dynamiska datamodellen MAGIC. Beräkningarna har tillämpats på välstuderat skogsbestånd i norra Skåne med försurad mark och bördig granskog som är representativt för sydvästra Sverige. Skogsmarken på den studerade lokalen försurades kraftigt under en period i mitten av 1900-talet med ökande deposition av försurande luftföroreningar, i synnerhet svavel, enligt modellberäkningarna. Samtidigt etablerades dessutom ett bördigt granbestånd som med tiden ökade upptaget av baskatjoner, vilket bidrog till markförsurningen. Den kraftigt minskade depositionen av svavel efter 1980 gav ett utrymme för en återhämtning från försurning, indikerat av stigande ANC och minskande halter av oorganiskt aluminium i markvatten, som kommer att vara märkbar under de närmaste decennierna oavsett typen av skogsbruk. Enligt beräkningarna planar återhämtningen därefter ut på en nivå som är långt från utgångsläget för mer än 100 år sedan med avseende på surhetstillstånd.

    Fulltekst (pdf)
    FULLTEXT01
  • 27.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Posch, M
    Aherne, J
    Evans, CD
    Forsius, M
    Larssen, T
    Helliwell, RC
    Cosby, BJ
    Dynamic modeling and target loads of sulfur and nitrogen for surface waters in Finland, Norway, Sweden, and the United Kingdom2019Inngår i: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851Artikkel i tidsskrift (Fagfellevurdert)
  • 28.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Tolkning av överskridande av kritisk belastning inom miljömålsarbetet2016Rapport (Annet vitenskapelig)
    Abstract [sv]

    Nedfallet av försurande ämnen över Sverige har minskat och förväntas minska ytterligare och den efterföljande återhämtningen från försurning har varit tydlig i många sjöar och vattendrag. Det betyder dock inte att alla sjöar och vattendrag fullt ut har återhämtat sig eller kommer göra det med nuvarande utsläppsnivå. Kritisk belastning (critical load, CL) har under många år varit ett utmärkt verktyg som har tillhandahållit argument vid utsläppsbegränsningsförhandlingar.

    I denna rapport har den nyligen modifierade metodiken för att beräkna kritisk belastning använts. Uträkningarna har använt data från MAGIC-biblioteket som under våren 2016 uppdaterades med bland annat nya skogbruksscenarier. Med dagens nedfall av svavel och kväve ligger överskridandet av kritisk belastning på strax över 10 % av Sveriges yta och CL-överskridandet kommer att ligga på denna nivå även inom nära framtid (2020). Detta resultat överensstämmer i stort med tidigare men med den högre upplösning av resultaten som finns i denna rapport förtydligas den geografiska skillnaden mellan den relativt hårt drabbade södra delen av landet och de mycket mindre belastade norra och mellersta delarna av Sverige. Att resultaten i stort överensstämmer med tidigare nivåer tolkar vi som att beräkningsmetodiken är robust och att de implementerade justeringarna ger ett ännu bättre underlag för nationellt arbete samtidigt som de tidigare internationellt rapporterade resultaten fortsatt är i samma storleksordning.

    Skogsbruket är en viktig del i CL-beräkningen. Man kan konstatera att en stor (och relativt sett allt större) del av de utbytbara baskatjoner som finns i markens katjonbyteskomplex och som tillförs marken genom vittring och nedfall nyttjas av skogsbruket och därför inte finns tillgängliga för att motverka försurningen. Konsekvensen blir att det spelar stor roll för CL-beräkningen vilket skogsbruk som används i beräkningen. Detta är dock bara ett konstaterande och inte skäl till att revidera den svenska hållningen i frågan att baskatjonupptag motsvarande stamvedsuttaget på 2010 års nivå ska användas vid kritiskbelastningsberäkningar.

    This report is only available in Swedish. English summary is available in the report.

    Fulltekst (pdf)
    FULLTEXT01
  • 29.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Futter, M.
    Cosby, BJC.
    Wright, RF.
    Consequences of intensive forest harvesting on the recovery of Swedish lakes from acidification and on critical load exceedances2017Inngår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Acrossmuch of the northern hemisphere, lakes are at risk of re-acidification due to incomplete recovery fromhistorical acidification and pressures associated withmore intensive forest biomass harvesting. Critical load (CL) calculations aimed at estimating the amount of pollutants an ecosystem can receive without suffering adverse consequences are dependent on these factors. Here, we present a modelling study of the potential effects of intensified forest harvesting on re-acidification of a set of 3239 Swedish lakes based on scenarios with varying intensities of forest biomass harvest and acid deposition. There is some evidence that forestrywould have caused a certain level of acidification even if deposition remained at 1860 levels. We show that all plausible harvest scenarios delay recovery due to increased rates of base cation removal. Scenario resultswere used to estimate critical loads for the entire population of lakes in Sweden. The forestry intensity included in critical load calculations is a political decision. After scaling calculations to the national level, it was apparent that a high but plausible forest harvest intensity would lead to an increase in the area of CL exceedances and that even after significant reductions in forest harvest intensity, there would still be areas with CL exceedances. Our results show that forest harvest intensity and regional environmental change must be carefully considered in future CL calculations.

  • 30.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Kronnäs, Veronika
    IVL Svenska Miljöinstitutet.
    Blomgren, Håkan
    IVL Svenska Miljöinstitutet.
    J. Cosby, Bernard
    MAGIC library – A tool to assess surface water acidification2020Inngår i: Ecological Indicators, ISSN 1470-160X, E-ISSN 1872-7034, Vol. 112Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We have developed a tool, the MAGIC library, which provides an acidification assessment for any given lake or stream in Sweden based on ten parameters describing lake geographical position, surface area, annual discharge and observed lake water chemistry. The MAGIC library consists of two key components: a library of the existing MAGIC model simulations for 2438 lakes and an analogue matching routine that selects the library lake which is most similar to the evaluation lake described by the ten parameters. The acidification assessment modelled by MAGIC for the library lake is then assumed valid for the evaluation lake. For more than 90% of the library lakes tested, the MAGIC library provided the same acidification assessment as the site-specific MAGIC model simulation. Labour and data requirements for assessment by the MAGIC library are very modest relative to the needs of site-specific MAGIC (or other similar) model simulations. The relative ease of use is essential for a country like Sweden, with a population of 100 000 lakes. The MAGIC library has a web interface (http://magicbiblioteket.ivl. se) to provide single assessments interactively or multiple assessments by uploading the ten required parameters for multiple sites. Conceptually the library has built-in flexibility and could be adapted for other types of ecosystems or assessments. In this paper we describe the MAGIC library concept and evaluate the performance of the MAGIC library in comparison to site-specific MAGIC modelling.

  • 31.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Tahovskà, K
    Choma, M
    Kaštovská, E
    Oulehle, F
    Bàrta, J
    Šantrucková, H
    Positive response of soil microbes to long-term nitrogen input in spruce forest: Results from Gårdsjön whole-catchment N-addition experiment.2020Inngår i: Soil Biology and Biochemistry, ISSN 0038-0717, E-ISSN 1879-3428, Vol. 143, artikkel-id 107732Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Chronic nitrogen (N) deposition from anthropogenic emissions alter N cycling of forests in Europe and in other impacted areas. It disrupts plant/microbe interactions in originally N-poor systems, based on a symbiosis of plants with ectomycorrhizal fungi (ECM). ECM fungi that are capable of efficient nutrient mining from complex organics and their long-distance transport play a key role in controlling soil N mineralization and immobilization, and eventual nitrate (NO3) leaching. Current meta-analyses highlight the importance of ECM biomass in securing the large soil N pool. At the same time, they point to the adverse effect of long-term N input on ECM fungi. The functioning of N-poor and N-overloaded forests is well understood, while the transient stages are much less explored. Therefore, we focused on the spruce-forest dominated catchment at Gårdsjön (Sweden) that received N addition of 40 kg N ha−1yr−1 over 24 years (a cumulative N input of >1200 kg N ha−1) but still loses via runoff only <20% of annual N input (deposition + addition) as NO3. We found that, compared to the control, the N-addition catchment had a much larger soil microbial biomass. The N addition did not change the fungi/bacteria ratio, but a larger share of the bacterial community was made up of copiotrophs. Furthermore, fungal community composition shifted to more nitrophilic ECM fungi (contact and short exploration type ECM species) and saprotrophs. Such a restructured community has been more active, possessed a higher specific respiration rate, enhanced organic P and C mining through enzymatic production and provided faster net N mineralization and nitrification. These may be early indications of alleviation of N limitation of the system. We observed no signs of soil acidification related to N additions. The larger, structurally and functionally adapted soil microbial community still provides an efficient sink for the added N in the soil and is likely to be one of the explanations for low NO3 leaching that have stabilized in the last decade. Our results suggest that a microbial community can contribute to effective soil N retention in spite of the partial relative retreat (20–30%) of nitrophobic ECM fungi with large external mycelia, provided the fungal biomass remains high because of replacement by other ECM and saprotrophic fungi. Furthermore, we assume that N retention of similar C-rich boreal forests (organic soil molar C/N ~35) is not necessarily threatened by a large cumulative N dose provided N enters at a moderate rate, does not cause acidification and the soil microbial community has time to adapt through structural and functional changes.

  • 32.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Veerman, L.
    Kalbitz, K.
    Gundersen, P.
    Kjönaas, J.
    Schleppi, P.
    Van Loon, E.E.
    Schoorl, J.
    Wessel, W.
    Tietema, A.
    The long-term fate of deposited nitrogen in temperate forest soils.2020Inngår i: Biogeochemistry, ISSN 0168-2563, E-ISSN 1573-515X, Vol. 150, s. 1-15Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Increased anthropogenic nitrogen (N) inputs can alter the N cycle and affect forest ecosystem functions. The impact of increased N deposition depends among others on the ultimate fate of N in plant and soil N pools. Short-term studies (3–18 months) have shown that the organic soil layer was the dominant sink for N. However, longer time scales are needed to investigate the long-term fate of N. Therefore, the soils of four experimental forest sites across Europe were re-sampled ~ 2 decades after labelling with 15N. The sites covered a wide range of ambient N deposition varying from 13 to 58 kg N ha−1 year−1. To investigate the effects of different N loads on 15N recovery, ambient N levels were experimentally increased or decreased. We hypothesized that: (1) the mineral soil would become the dominant 15N sink after 2 decades, (2) long-term increased N deposition would lead to lower 15N recovery levels in the soil and (3) variables related to C dynamics would have the largest impact on 15N recovery in the soil. The results show that large amounts of the added 15N remain in the soil after 2 decades and at 2 out of 4 sites the 15N recovery levels are higher in the mineral soil than in the organic soil. The results show no clear responses of the isotopic signature to the changes in N deposition. Several environmental drivers are identified as controlling factors for long-term 15N recovery. Most drivers that significantly contribute to 15N recovery are strongly related to the soil organic matter (SOM) content. These findings are consistent with the idea that much of the added 15N is immobilized in the SOM. In the organic soil layer, we identify C stock, thickness of the organic layer, N-status and mean annual temperature of the forest sites as most important controlling factors. In the mineral soil we identify C stock, C content, pH, moisture content, bulk density, temperature, precipitation and forest stand age as most important controlling factors. Overall, our results show that these temperate forests are capable of retaining long-term increased N inputs preferably when SOM availability is high and SOM turnover and N availability are low.

  • 33.
    Moldan, Filip
    et al.
    IVL Svenska Miljöinstitutet.
    Westling, Olle
    Munthe, John
    IVL Svenska Miljöinstitutet.
    Geochemical modelling of acidification and recovery in forest soils and runoff waters1999Rapport (Annet vitenskapelig)
    Abstract [sv]

    The Model of Acidification of Groundwaters in Catchments (MAGIC) was used to simulate the impact of acidifying deposition and future recovery at the Gårdsjön Covered Catchment Experiment, at a number of hypothetical stations defined by statistical variation of the Gårdsjön data and at 20 forest monitoring sites in Southern Sweden. For the future predictions a decrease of sulphur deposition of more then 70% was assumed. This assumption is based on a full implementation of the agreements made under the second sulphur protocol from 1994. The modelled impact of reduced deposition on the soils and on the runoff waters was discussed. To complement the discussion on long-term trends in future run-off chemistry, data from Gårdsjön has been used to asses the risk for short-term acid runoff episodes

    Fulltekst (pdf)
    FULLTEXT01
  • 34.
    Munthe, John
    et al.
    IVL Svenska Miljöinstitutet.
    Arnell, Jenny
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Karlsson, Per Erik
    IVL Svenska Miljöinstitutet.
    Åström, Stefan
    IVL Svenska Miljöinstitutet.
    Gustafsson, Tomas
    IVL Svenska Miljöinstitutet.
    Kindbom, Karin
    IVL Svenska Miljöinstitutet.
    Hellsten, Sofie
    IVL Svenska Miljöinstitutet.
    Hansen, Karin
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Lindblad, Maria
    IVL Svenska Miljöinstitutet.
    Tekie, Haben
    IVL Svenska Miljöinstitutet.
    Malmaeus, Mikael
    IVL Svenska Miljöinstitutet.
    Kronnäs, Veronika
    IVL Svenska Miljöinstitutet.
    Klimatförändringen och miljömål2016Rapport (Annet vitenskapelig)
    Abstract [en]

    Forskningsprogrammet CLEO, Climate change and Environmental Objectives, startades 2010 efter en utlysning från Naturvårdsverket där man efterfrågade forskning med en övergripande målsättning att få: * En analys och kvantifiering av hur förändringar i klimatet, såsom temperatur, nederbörd och avrinning, påverkar förutsättningarna att nå de miljömål som påverkas av långväga transporterade luftföroreningar * En beskrivning och analys av synergier och målkonflikter av åtgärder, både nationellt och internationellt, för att minska utsläpp av växthusgaser och andra luftföroreningar för att nå uppsatta miljömål. * Förbättrad kunskap om grundläggande processer för att ta fram tillförlitliga prognoser och scenarier för utvecklingen mot miljömålen, förbättrade indata till existerande modeller samt bättre sammanlänkning av modeller för klimat, luft och ekosystem.

    Programmet har fokuserat på miljömålen Frisk luft, Bara Naturlig Försurning, Ingen övergödning och i viss mån Giftfri miljö. Då målsättningen var att ta fram resultat som är relevanta för pågående arbete med miljömålen och för långsiktiga överväganden så har CLEO arbetat med framtidsscenarier som både fokuserat på en relativt nära framtid (2030), och i vissa avseenden ett längre tidsperspektiv (2100).

    This report is only available in Swedish. English summary is available in the report.

    Fulltekst (pdf)
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  • 35.
    Munthe, John
    et al.
    IVL Svenska Miljöinstitutet.
    Grennfelt, Peringe
    IVL Svenska Miljöinstitutet.
    Sverdrup, Harald
    Sundqvist, Göran
    Alveteg, Mattias
    Bishop, Kevin
    Bergkvist, Veronika
    Falkengren-Grerup, Ursula
    Hansson, Hans-Christen
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Karlsson, Per Erik
    IVL Svenska Miljöinstitutet.
    Näsholm, Torgny
    Pleijel, Håkan
    Westling, Olle
    New concepts and methods for effect-based strategies on transboundary air pollution. Synthesis Report, April 20022002Rapport (Annet vitenskapelig)
    Abstract [sv]

    This report was prepared in connection with the scientific evaluation of the ASTA programme in May, 2002. It consists of a comprehensive summary of the approaches and results from the different ASTA sub programmes. ASTA is presently in its fourth and last year of the first phase. The report is not intended to give a full description of all relevant aspects of the problem of transboundary air pollution but rather discuss some crucial problems and their possible scientific solutions. After the preparation and submission of this report, ASTA has been positively evaluated and will continue into its second phase. The evaluation reports as well as a letter of intent for the second phase of the ASTA programme are available on the ASTA web page (http://asta.ivl.se). Further information of the programme is also available at the web page. For those who wish to receive more information of the programme, there is a list of contact persons at the end of the report. Many of the ASTA phase 1 activities are currently in a state of intense evaluation and reporting and additional scientific results as well as synthesises and assessments will be prepared during the remainder of 2002.

    Fulltekst (pdf)
    FULLTEXT01
  • 36.
    Munthe, John
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Karlsson, Per Erik
    IVL Svenska Miljöinstitutet.
    Åström, Stefan
    IVL Svenska Miljöinstitutet.
    Gustafsson, Tomas
    IVL Svenska Miljöinstitutet.
    Kindbom, Karin
    IVL Svenska Miljöinstitutet.
    Hellsten, Sofie
    IVL Svenska Miljöinstitutet.
    Hansen, Karin
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Lindblad, Maria
    IVL Svenska Miljöinstitutet.
    Kronnäs, Veronika
    IVL Svenska Miljöinstitutet.
    Malmaeus, Mikael
    IVL Svenska Miljöinstitutet.
    Klimatförändringen och miljömålen2014Rapport (Annet vitenskapelig)
    Abstract [en]

    This report is only available in Swedish.

    Fulltekst (pdf)
    FULLTEXT01
  • 37.
    Munthe, John
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Karlsson, Per Erik
    IVL Svenska Miljöinstitutet.
    Åström, Stefan
    IVL Svenska Miljöinstitutet.
    Gustafsson, Tomas
    IVL Svenska Miljöinstitutet.
    Kindbom, Karin
    IVL Svenska Miljöinstitutet.
    Hellsten, Sofie
    IVL Svenska Miljöinstitutet.
    Hansen, Karin
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Lindblad, Maria
    IVL Svenska Miljöinstitutet.
    Malmaeus, Mikael
    IVL Svenska Miljöinstitutet.
    Klimatförändringen och miljömålen - Sammanfattning och slutsatser2014Rapport (Annet vitenskapelig)
    Abstract [en]

    This report is only available in Swedish.

    Fulltekst (pdf)
    FULLTEXT01
  • 38.
    Olshammar, Mikael
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Flödesmätningar i Luossajoki och Rakkuri-systemet2018Rapport (Annet vitenskapelig)
    Abstract [sv]

    IVL har sedan hösten 2015 på uppdrag från LKAB mätt vattenflöden i sjön Ala Lombolos utlopp och sedan sommaren 2016 även vid sjöns inlopp, vilka ingår i Luossajokis avrinningsområde. Under 2017 installerade IVL utrustning för mätning av vattennivåer i sjön, Yli Lombolo, uppströms Ala Lombolo. Arbetet syftar till att generera högkvalitativt dataunderlag till ett prövotidsförfarande relaterat till ett miljötillstånd som LKAB erhållit för åtgärder i sjön Luossajärvi. Inom uppdraget ”Flödesmätningar i Rakkurijärvi” installerade IVL på uppdrag av LKAB under år 2016 tre stycken vattenföringsstationer: nedströms Mettä-Rakkurijärvis utlopp, 220 m uppströms vägbron, vid utloppet från Rakkurijärvi och vid Pahtohajåkk.

    Fulltekst (pdf)
    FULLTEXT01
  • 39. Peacock, Mike
    et al.
    Futter, Martyn N.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Kothawala, Dolly N.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Stadmark, Johanna
    IVL Svenska Miljöinstitutet.
    Evans, Chris D.
    Three Decades of Changing Nutrient Stoichiometry from Source to Sea on the Swedish West Coast2022Inngår i: Ecosystems (New York. Print), ISSN 1432-9840, E-ISSN 1435-0629, Vol. 25, nr 8, s. 1809-1824Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    European ecosystems have been subject to extensiveshifts in anthropogenic disturbance, primarilythrough atmospheric deposition, climate change,and land management. 

    These changes have alteredthe macronutrient composition of aquatic systems,with widespread increases in organic carbon (C),and declines in nitrogen (N) and phosphorus (P).Less well known is how these disturbances haveaffected nutrient stoichiometry, which may be amore useful metric to evaluate the health ofaquatic ecosystems than individual nutrient concentrations.

    The Swedish west coast has historicallyexperienced moderate to high levels of atmosphericdeposition of sulfate and N, and eutrophication. Inaddition, coastal waters have been darkening withdamaging effects on marine flora and fauna.

    Here,we present three decades of macronutrient datafrom twenty lakes and watercourses along the Swedish west coast, extending from headwaters toriver mouths, across a range of land covers, andwith catchments ranging 0.037–40,000 km2. Wefind a high degree of consistency between thesediverse sites, with widespread increasing trends inorganic C, and declines in inorganic N and total P.

    These trends in individual macronutrients translateinto large stoichiometric changes, with a doublingin C:P, and increases in C:N and N:P by 50% and30%, showing that freshwaters are moving furtheraway from the Redfield Ratio, and becoming evenmore C rich, and depleted in N and P.

    Althoughrecovery from atmospheric deposition is linked tosome of these changes, land cover also appears tohave an effect; lakes buffer against C increases, anddecreases in inorganic N have been greatest underarable land cover. Our analysis also detects coherentlydeclining P concentrations in small forestlakes; so called (and unexplained) ‘‘oligotrophication.’’

    Taken together, our findings show thatfreshwater macronutrient concentrations and stoichiometryhave undergone substantial shifts duringthe last three decades, and these shifts can potentiallyexplain some of the detrimental changes thatadjacent coastal ecosystems are undergoing.

    Ourfindings are relevant for all European and NorthAmerican waters that have experienced historicallyhigh levels of atmospheric deposition, and provide a starting point for understanding and mitigating against the trajectories of long-term change in aquatic systems.

    Fulltekst (pdf)
    fulltext
  • 40.
    Sahlén Zetterberg, Therese
    et al.
    IVL Svenska Miljöinstitutet.
    Westling, Olle
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Försurningsepisoder i södra Sverige. Nuvarande omfattning och framtida betydelse2006Rapport (Annet vitenskapelig)
    Abstract [sv]

    I takt med att nedfallet av försurande ämnen har minskat har den naturliga återhämtningen påbörjats i mark och vatten. Det finns emellertid en möjlighet att återhämtningen eventuellt bromsas av tillfälliga försurningsepisoder. Om så är fallet bör episodförsurning inkluderas i revideringen av Naturvårdsverkets bedömningsgrunder för försurning av ytvatten, tillstånd och påverkan. Försurningsepisoder definieras i denna rapport som en kraftig avvikelse från medelkemin vilket kan ha en stor betydelse för det biologiska livet. Två olika typer av försurningsepisoder har identifierats; torkstyrda episoder samt havssaltepisoder, den föregående framkallad av sommartorka och den senare av stormar. Episoder orsakad av höga flöden och snösmältning kunde inte påvisas i någon av bäckarna. Oavsett drivfaktor ger episoderna upphov till en sänkning av ANC samt en ökning av oorganiskt Al. Sänkningen är tillfällig och kortvarig. Redan vid nästa mättillfälle (vanligtvis 2-4 veckor) har vattenkemin återställts till de förhållanden som rådde innan försurningsepisoden. Återhämtningen från försurning är påtaglig i de vattendrag som ingår i studien vilket innebär att torkstyrda episoder inte längre är ett försurningsproblem i södra Sverige och därmed inte behöver beaktas i en revidering av bedömningsgrunderna. Risken för havssaltepisoder är fortfarande hög, men endast i en begränsad del av landet (kustnära områden i sydvästra delen av Sverige). I övriga delar av södra Sverige verkar kraftiga havssaltnedfall inte leda till episodförsurning. Klimatförändringar, främst ökad stormfrekvens, kan öka depositionen av havssalt och därmed även risken för försurningseffekter i framtiden.

    Fulltekst (pdf)
    FULLTEXT01
  • 41.
    Sanne, Johan
    et al.
    IVL Svenska Miljöinstitutet.
    M.J., Chesa
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Rahmberg, Magnus
    IVL Svenska Miljöinstitutet.
    Hubers, E
    Lessons from adapting resilience indicators to flooding and storm- water management.2021Rapport (Annet vitenskapelig)
    Abstract [en]

    This deliverable reports on the activities conducted as part of Task 5.2.The objective is to a) contributeto improving resilience to releases of contaminated water in the Göteborg case study and b) to identifysocial and organizational enablers for the development and effective use of technologies fordigitalization of water management. For this purpose, we used tools developed for identifying, visualizingand evaluating/acting upon data addressing resilience in critical infrastructures, defined and quantifiedthrough indicators.The framework for the deliverable is based upon a) a previous H2020 project regarding the design,implementation and added value from using the tools as well as b) findings from the SCOREwaterdeliverable D5.1 regarding issues of stakeholder engagement, user involvement and implementation/evaluation (focusing on the two former).

    Through an iterative design process, we created a baseline witha scenario with regard to resilience against the release of insufficiently purified water from a worksitein the West link construction project in Göteborg. Based upon the baseline we created a business casefor what we wanted to measure and improve through the tools. We created two checklists for measuringand acting upon data on resilience addressing the business case. Finally, we identified a few bestpractices for stakeholder engagement as well as examples of how to make best use of the technologiesand services to be developed and deployed in the SCOREwater project.The deliverable provides a process description of the successive iteration we carried out. We show halffinishedchecklists for resilience measurement, describe stakeholder feedback from these and asuccessive development of the business case and the checklists.

    The process illustrates that the tool isuseful for this context and provide a beneficial illustration for how to create useful checklists thatstakeholders benefit from to increase knowledge about resilience and how to improve resilience. Thebest practices for introducing and adapting the resilience tools were to do “homework” properly (that isto identify the relevant baseline) and to interact intensively to identify and define stakeholder issuessuch as:1. What is the regulatory context setting the rules of the game?2. Who are the relevant actors, their responsibilities and their possible contributions?3. What are their problems and motivations (pains and gains)?4. What added value can the tools provide?5. How can the purpose of using the tools best be aligned with and add to the overall project/casestudy objectives?Similarly, the replication of the tools in Amersfoort and possibly Barcelona require doing the “homework”and engaging in identifying baselines and business cases as well as how to implement them into existingpractices.Contribution to the case study: The Göteborg municipal environmental board saw the tools as anopportunity to develop methods for early warning, such as enabling mitigation of negative environmentalimpacts on recipients from the release of stormwater and process water from construction sites.Construction companies saw that the tools provided potentials for improving knowledge of resilience oftheir water management as well as potentials to improve their resilience. Stakeholders stressed that ifthe organizational capacities to make use of the data and services provided by improvements in sensorcapability and AI solutions are not improved, overall resilience would not be improved. The baseline is also useful to measure the impacts in a later stage of the project.

    Contribution to the project: The social and organizational enablers identified to make best use of thetechnologies and services to be developed and deployed in the SCOREwater project were related to thecommunicative and organizational abilities to react to and how to use the improvements in sensortechnology and AI solutions. The business case provides an example of how added value could help toimprove current practices at construction sites and provide arguments for the possibility for morestringent regulation and oversight due to improved technology. This includes e.g. workplace routines foracting upon alarms, as well as more frequent reporting to authorities, based upon real-time monitoringand using AI technology for proxy indicators.

    Fulltekst (pdf)
    fulltext
  • 42.
    Sanne, Johan
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Galfi, H.
    Evertsson, J.
    Meijer, H
    Martínez Ruiz, A
    Chesa Marro, M-J
    Vanmeulebrouk, B
    de Bruin, B
    Rubion Soler, E
    Ribalta, M
    Recommendations for future development of technologies for water management2021Rapport (Annet vitenskapelig)
    Abstract [en]

    A challenge describes both opportunities and barriers, and an enabler provides means to manage achallenge.

    The framework for the deliverable is based upon identifying process facilitators (e.g.workshops) and discursive abilities/devices providing enablers that partners used in order to make senseacross organizations and professional communities (developers and users) as a means to develop anddeploy digital technologies and services.

    IVL lead the work and edited the deliverable. Gothenburg city (CGEA), city of Amersfoort (COA) andBarcelona waste and wastewater company (BCASA) provided experiences as stakeholder and dataprovider, through user involvement.

    IVL Swedish Environmental Institute, Eurecat (EUT), Talkpool (TP),Civity (CIV) provided experiences from development and implementation work (focusing on stakeholderengagement and user involvement). They all contributed to the deliverable through meetings and writingone section each. Analysing the same processes from different points of view provided interesting insightsinto the development process and implications for the coming phases of the project.

    The Gothenburg section expresses how insights from cooperation issues from before the project, wereturned into a well-designed collaboration process (process facilitator) between developers andusers/stakeholders. In Gothenburg, engaging with various departments within the municipality and withexternal stakeholders has been a continuing learning process for IVL (case study leader).

    IVL graduallypresented various opportunities within the project, both in Amersfoort and Barcelona, which has beenvery much appreciated by the stakeholders. In this way, the engagement process has also enabledstakeholders to envision a number of opportunities that the new technologies empower that can becontinued beyond SCOREwater.

    Moreover, due to a fruitful collaboration between developers and stakeholders, both Gothenburg andBarcelona cities now envision even more opportunities and ambitions, some of which might be realizedwithin the project, some outside.Both Amersfoort and Barcelona also analyse how insights from different organizational issues influencedtheir design of process facilitators and discursive abilities.

    The Amersfoort section shows the influencefrom a) the different organizational structures and motives between the municipality, the for-profitcompanies and citizen volunteers and b) the differences in work processes between their policy makersand data analysts, people that seemed to be previously unfamiliar with working together.

    The first issuewas addressed through finding common ground in the objectives (added value as a discursive device) andthe second through designing a common process – going from simple to more complex hypothesis.

    In the Barcelona case, BCASA realized a) that they needed to “translate” their needs and concepts withregard to wastewater maintenance to other Catalan partners and b) that they needed to involve andengage both workers and managers at several departments for the SCOREwater project so that theyunderstand.

    see and value the benefits it provide and therefore engage in and support the SCOREwaterproject. EUT, TP and CIV expressed fewer specific challenges than the case studies, using familiar andproved process facilitators and discursive devices (CRISP-DM business modelling and user stories).

    Fulltekst (pdf)
    fulltext
  • 43.
    Stadmark, Johanna
    et al.
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Swedish National Nitrogen Budget – Hydrosphere2020Rapport (Annet vitenskapelig)
    Abstract [en]

    Excessive amounts of reactive nitrogen (Nr) in the hydrosphere can impair water quality and alter the functioning of aquatic ecosystems. Monitoring of water bodies and awareness of the existing flows of nitrogen from different sectors in society can support policy making. In this report we quantified the major flows of Nr in the Hydrosphere pool of the Swedish National Nitrogen Budget, according to the methodology provided by the Task Force on Reactive Nitrogen. Calculations were done for one full year using data mainly from 2014 but also from 2015.

    In 2014/2015, the largest inflows of Nr to the Swedish hydrosphere were leaching from agriculture (53 kilotonnes, kt), from forests (48 kt), atmospheric deposition (33 kt), leaching from wetlands and other land (20 kt) and municipal wastewater treatment plants (17 kt). In addition, there were minor contributions from industrial wastewaters, small dwellings and from stormwater runoff. The major outflows were transport from the coastal waters to the open sea and marine denitrification (together 127 kt) and denitrification from freshwaters (34 kt) N. In addition, there were quantitatively less important Nr losses through fishing, N2O emissions and water abstraction.

    Data come from Svenska MiljöEmissionsData, Statistics Sweden, Nationellt vattentäktsarkiv and SMHI.

    Fulltekst (pdf)
    FULLTEXT01
  • 44.
    Stadmark, Johanna
    et al.
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Yaramenka, Katarina
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Swedish National Nitrogen Budget - Energy and fuels2023Rapport (Annet vitenskapelig)
    Abstract [en]

    This report presents pool 1 “Energy and fuels” (EF) in the Swedish national nitrogen budget (NNB). The EF pool is divided into four sub-pools; Energy conversion (EC), Manufacturing industries and construction (IC), Transport (TR) and Other energy and fuels (OE).

    The Swedish data presented in this report are for 2015 whenever possible. If data were not available for 2015, available information for the year closest to 2015 have been used. The data were collected from Swedish official statistics and reports and preferably from sources that will continue to be updated, to make it easier to evaluate possible changes in N budgets in the future.

    Emissions of reactive nitrogen (Nr) to the atmosphere via various combustion processes have been quantified as they have been reported to international conventions (CLRTAP and UNFCCC) broken down by the codes used in those reports. 

    The largest emissions of Nr occur from transport (24.1 kt), followed by manufacturing and construction (6.7 kt), other energy and fuels (4.9 kt) and energy conversion (4.8 kt). The majority of reactive nitrogen emissions from this sector (> 90 percent) consists of NOx, and otherwise of N2O and NH3.

    The import of primarily crude oil and of other oil-based fuels means a flow of N from the rest of the world to Sweden (53.5 kt). A fraction of this amount is converted to reactive forms and emitted to the atmosphere during combustion. The main part of the NOx that is emitted from fuel combustion is, however, formed when nitrogen in the air is oxidized during the combustion (thermal production of NOx) and does not originate from the N in the fuel. Remaining N in the crude oil and oil products is either removed from the fuel during cracking in refineries or converted to N2 during combustion. Development of combustion processes where NOx is not formed leads to lower emissions.  Biofuels such as ethanol and biodiesel are produced from e.g. wheat and rapeseed. A large part of the nitrogen present in these crops will remain in the residual products after fuel production and can be used for animal feed. They do not result in any emissions of reactive nitrogen in this national nitrogen budget.

    The national nitrogen budgets do not include international transport (shipping, aviation), so additional emissions of reactive nitrogen will need to be added if a global aggregation is to be made.

    Fulltekst (pdf)
    fulltext
  • 45.
    Stadmark, Johanna
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    DOC-förändringar och MAGIC2017Rapport (Annet vitenskapelig)
    Abstract [sv]

    Denna rapport sammanfattar de svenska studier som har undersökt hur halten av löst organiskt kol (DOC) i våra vatten förändrats över tid. De trender som visats i övervakningsdata från de senaste ca 30 åren redovisas också. Syftet är att sammanställa vilka processer eller mekanismer som har påverkat DOC-halten och att uppskatta betydelsen av detta för bedömning av försurning för att på sikt ytterligare förbättra försurningsbedömningarna i svenska sjöar och vattendrag. Bedömning av försurningsstatus för en sjö eller ett vattendrag i Sverige görs antingen direkt genom modellering med MAGIC (Model of Acidification of Groundwater In Catchments) eller indirekt genom att ett antal parametrar matas in i verktyget MAGIC-biblioteket (magicbiblioteket.ivl.se) som ger en bedömning.

    Ett antal studier har ett experimentellt upplägg, till exempel studeras hur DOC-halten över året skiljer sig åt i avrinningsområden med varierande andel skog och våtmark och hur tillsatser av försurande ämnen påverkar. Andra studier använder data som samlats in via miljöövervakningen för ett stort antal sjöar under de senaste decennierna.

    Sedimentdata från ett urval av sjöar har studerats med metoden VNIRS (visible near-infrared spectroscopy) för att identifiera halten totalt organisk kol (TOC, i stort sett enbart bestående av DOC) över längre tidsperioder, i vissa fall flera tusen år. Dessa mätningar visar att DOC-halten sedan den senaste istiden ofta varit högre än idag. Nedgången i TOC-halt under 1900-talet har i flera studier förklarats som en påverkan av det höga svavelnedfall som skedde under framför allt mitten till slutet av 1900-talet. Förändringar i markanvändning och klimat är andra förklaringsmodeller.

    Dagens försurningsbedömningar, där en förändring i pH från 1860 till idag uppskattas och en minskning i pH med mer än 0,4 pH-enheter anses innebära att sjön eller vattendraget är påverkat av försurning, bygger på att pH-värdet år 1860 kan uppskattas på ett tillförlitligt sätt. I denna rapport diskuteras DOC-haltens inverkan på bedömningen.

    Fulltekst (pdf)
    FULLTEXT01
  • 46.
    Stadmark, Johanna
    et al.
    IVL Svenska Miljöinstitutet.
    Moldan, Filip
    IVL Svenska Miljöinstitutet.
    Jutterström, Sara
    IVL Svenska Miljöinstitutet.
    Nitrogen budget - Agriculture Sweden2019Rapport (Annet vitenskapelig)
    Abstract [en]

    To better understand the magnitude of reactive nitrogen flows in a country, a national nitrogen budget can be constructed. In this report, we use a methodology developed by the Expert Panel on Nitrogen Budgets (EPNB) under the Task Force for Reactive Nitrogen (TFRN) and describe the flows of nitrogen in agriculture in Sweden in 2015.

    The primary source of data presented in this report are data reported to Eurostat and UNFCCC regarding gross nutrient balance and greenhouse gases. The flows of nitrogen not covered by Eurostat and UNFCCC originate from for example the national compilations of content of feed products and slaughtering weight of animals for consumption.

    The largest inputs of nitrogen to agriculture are in the form of supply of inorganic fertilizer to soil (190 kT) and feed to animals (59 kT). The largest outputs of nitrogen are in the form of products for consumers (eg crops, meat, milk, eggs) (171 kT) and emissions to the hydrosphere and atmosphere (93 kT).

    In total, the inputs were 15 percent larger than the outputs, which is well within the differences found in other countries. The difference may be due to uncertainties in the collected data or that further flows may occur. Such flows should be identified and investigated in the future. The difference may also indicate that the pool of nitrogen in agriculture is not in balance, i.e. nitrogen is stored in the soil.

    Fulltekst (pdf)
    FULLTEXT01
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