Precipitation chemistry

Aim define the input to the IM sites of pollutants carried in the precipitation Measurements are carried out monthly using open bulk collectors, situated in an open area of the site.   Variables Cl-, SO4-, NO3-, NH4+, Ca2+, Mg2+, Na+, K+, pH and water volume For further information see IVL.

The bottle (left) that receives rain water is covered with aluminum foil in order that light may not promote algal growth and thus disturb the element balance in the water. The sack to the right collects snow which is then melted before volume measurement and chemical analysis.