Source apportioned annual load of nitrogen to inland waters in the sub-catchments of the Baltic. (A)

NB: The location of the Baltic Sea sub-catchments can be found at http://www.helcom.fi/environment2/nature/en_GB/facts/
Geographical coverage note: Bothnian Bay, Gulf of Finland, Bothnian Sea, Baltic Proper, Gulf of Riga, Kattegat, Archipelago Sea, Western Baltic, The Sound