DEPOSITION MONITORING IN EUROPE

A monitoring station for atmospheric deposition was designed and const ructed. Three such stations were applied in a pilot project for a year on three sites (Speulder forest in The Netherlands, Auchencorth in Sc otland and Melpitz in Germany) in different regions in Europe to estim ate local inputs and to validate deposition models which are currently used or developed to estimate ecosystem specific deposition in Europe . Fluxes at Auchencorth Moss are lowest for all components, except for those much influenced by the sea as a source. As Melpitz is located f ar away from seas, these components are lowest at this site. Wet depos ition is the dominant source of input at Auchencorth, whereas at Speul der forest, through its roughness and pollution climate, dry depositio n is dominant. At this site dry deposition velocities are highest. Mel pitz is a polluted site. Particularly sulphur deposition is high. It i s recommended to equip several locations in Europe with intensive depo sition monitoring methods. Such a network will be an extension of exis ting monitoring programmes on air pollution, such as that run by Europ ean Monitoring and Evaluation Programme for the long-range transmissio n of air pollutants in Europe (EMEP). The intensive monitoring locatio ns should be selected based on pollution climates and type of vegetati on, common in Europe.