C. Kroeze et Sp. Seitzinger, The impact of land use on N2O emissions from watersheds draining into the Northeastern Atlantic Ocean and European Seas, ENVIR POLLU, 102, 1998, pp. 149-158
This paper focuses on the impact of land use on biogenic (both terrestrial
and aquatic) nitrous oxide (N2O) emissions from watersheds draining into th
e Northeastern Atlantic Ocean, the Baltic Sea, the Black Sea and the Medite
rranean Sea. While these watersheds cover about 10% of the global land area
draining into oceans, nitrogen (N) inputs to soils (40 Tg N year(-1)) in t
hese watersheds include about 25% of worldwide fertilizer use, and about 20
% of worldwide atmospheric NOy deposition and N excretion by livestock. Tot
al biogenic N2O emissions from this region are calculated to be 1.8 Tg N ye
ar(-1). This includes 0.8 Tg N year(-1) from background emissions from soil
s, 0.6 Tg N year(-1) from soil emissions induced by additional N inputs, an
d 0.3 Tg N year(-1) from aquatic emissions. Our results indicate that human
activities have at least doubled biogenic N2O emissions from this region.