At present, Sweden has 4 integrated monitoring (IM) sites that are part of a European network on integrated monitoring with an extensive measurement program. One of these sites, Gammtratten, situated in central Västerbotten, monitors several variables. This program is part of the International Cooperative Programme (ICP) on Integrated Monitoring (IM) of Air Pollution Effects on Ecosystems In Sweden there are three IM-sites, out of which Gammtratten in northern Sweden is one. The IM program at Gammtratten is performed by a consortium including IVL, SGU and SLU-EA. Basically there are three types of monitoring at the IM-sites, viz. Climatic, Chemical and Biological observations. Below is a list of the different analysis programs Air Concentration: SO2, NO2 Bulk deposition: pH, Cond, NO3-N, NH4-N, SO4-S, CL, Ca, Mg, Na, K, (Cu, Pb, Zn, Cd, Hg, MetylHg, Cr, Ni, Co, V, As) Throughfall: pH, Cond, NO3-N, NH4-N, SO4-S, CL, Ca, Mg, Na, K, (Cu, Pb, Zn, Cd, Hg, MetylHg, Cr, Ni, Co, V, As) Soil water: pH, Cond, tot-N, org-N, NO3-N, NH4-N, Tot-P, PO4-P, DOC, SO4-S, CL, Alk, Ca, Mg, Na, K, Al, Al-tot, Al-org, Al-inorg, Fe, Mn, Cu, Pb, Zn, Cd, Hg, MetylHg, Cr, Ni, Co, V, As Groundwater: All years: pH, Cond, Si, NO3-N+NO2-N, NH4-N, PO4-P, TOC, SO4-S, CL, Alk/acidity, Ca, Mg, Na, K, Al, Fe, Mn, Cu, Pb, Zn, Cd, and some years also Hg, Metyl-Hg, Cr, Ni, Co, V, As Stream water: All years pH, Cond, NO3-N, NH4-N, PO4-P, TOC, SO4-S, CL, Alk/acidity, tot-N, tot-C, Ca, Mg, Na, K, Al, Fe, Mn, runoff volume and some years also Hg, Metyl-Hg, Cu, Pb, Zn, Cd and labile Al. Soil chemistry: pH in water extracts, exchange acidity, exchangeable Ca, Mg, Na, K, Al, Mn, and Fe, base saturation and total content of C, N, P, S, Cu, Zn, Pb, Cd and Hg Litter fall: Amount of litter (dw per unit area), total P, C, N, and S, K, Ca, Mg, Na, Al, Mn, Fe and during special years also Cu, Zn, Pb, Cd, Hg Litter decomp.: Dry weight loss from standard needles of Scots pine Soil respiration: CO2 -evolution per hour at 20oC, pH, Pb, Cd, Hg in OF-layer Understorey veg.: Field vegetation: Species, coverage, fertility, trees: speecies, coordinates, dbh, heiight, vitality. Down logs and stumps: species, dbh, degree of decomposition Needle chemistry: Total-P, tot-C, tot-N, and tot-S, K, Ca, Mg, Na, Al, Mn, Fe, Cu, Zn, Pb, Cd, Hg, arginin Biomass: Biomass, tot-C, tot-N, tot-P, K, Ca, Mg, Fe, Mn, Zn, Cu, B Forest injuries: Needle loss, dicolouring of needles, other injuries, tree class Simulated water balance: Precipitation, Evaporation, Runoff, Soil water, Snow Network type: integrated monitoring
Air Concentration, Biomass, Bulk deposition, Forest injuries, Groundwater, Litter decomp., Litter fall, Needle chemistry, Simulated water balance, Soil chemistry, Soil respiration, Soil water, Stream water, Throughfall, Understorey veg.
Swedish Environmental Research Institute (IVL), Swedish University of Agricultural Sciences (SLU), Geological Survey of Sweden (SGU)