Mapping base cation deposition in Europe on a 10x20 km grid

Atmospheric deposition of base cations in Europe is mapped on a 10x20 km grid using the inferential modeling technique. Deposition fields are found to resemble the geographic variability of sources, climate and land use. In large parts of southern Europe, more than 50% of the potential acid deposition is found counteracted by deposition of base cations. In central and northwestern Europe, however, base cation deposition usually amounts less than 25% of the acid input An uncertainty analysis to assess the quality of the base cation deposition maps revealed that for an average grid cell the deviation from the estimated value can be as large as 140%.