IVL Swedish Environmental Research Institute

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.

IVL Swedish Environmental Research Institute Ltd here report results of work within the Swedish part of the FUTMON project; "Further Development and Implementation of an EU-level Forest Monitoring System". Samples were collected at 3 Integrated Monitoring sites (Kindla, Gammtratten and Aneboda) and 8 forested plots, two in vicinity of each of the 4 Swedish IM sites (Asa Sandbäcken, Asa Ängavägen, Kindla Buskbäcken, Kindla Bohyttan, Gammtratten Balån Nord, Gammtratten Risbäcken, Gårdsjön F2 and Gårdsjön  F3). Sampling at the fourth Swedish IM site, Gårdsjön F1 IM was performed and analysed as well; however, as a part of IM and not of FUTMON. Sampling of throughfall, litterfall, runoff, air temperature and air humidity was performed during 2010. Quality control, evaluation and reporting of results have further been carried out. The throughfall deposition of sulphur-sulphate was highest at Asa Sandbäcken (3.5 kg ha-1 yr-1). The throughfall deposition of sea salt was highest at Gårdsjön because the close position to the North Sea. The deposition of total nitrogen (nitrate-nitrogen, ammoniumnitrogen, organic nitrogen) varied between 2.8 kg ha-1 yr-1 at Gammtratten to approximately 7 kg ha-1 yr-1 at Gårdsjön. These amounts are lower than observed during earlier years, e.g. for Gårdsjön.No large difference appeared between the concentrations of nitrate-nitrogen in runoff water at Gårdsjön F2 and F3. Nitrate-nitrogen was only observed in runoff water during the winter time. On the other hand, differences occurred between the two forest catchments for the concentrations of calcium, magnesium, total aluminium and dissolved organic carbon.The concentrations of total mercury varied between 1.4 and 14.4 ng l-1 and for methyl mercury between 0.06 och 4.1 ng l-1. The highest concentrations of both were measured at Asa Sandbäcken, Asa Ängavägen and Aneboda IM that are the most southern forests. The lowest concentrations were accordingly observed at the northern most forests, Gammtratten IM. The concentrations were higher during summer time and confirm earlier analyses between different seasons.The air humidity is often very high at Gårdsjön. This causes technical problems using Tiny Tag loggers which often show relative air humidity values above 100%. The logged air humidity data at Gårdsjön should therefore be evaluated with care. Temperature values measured using the same loggers are however reasonable and approximately alike for the two forest catchments at Gårdsjön (F2 and F3).This report is only available in Swedish.