TY  - RPRT
AU  - Gravenhorst, G.
AU  - Ehhalt, D. H.
AU  - Böttger, A.
TI  - Atmosphärische Kreisläufe von Stickoxiden und Ammoniak
VL  - 1558
IS  - Juel-1558
CY  - Jülich
PB  - Kernforschungsanlage Jülich, Zentralbibliothek, Verlag
M1  - PreJuSER-136080
M1  - Juel-1558
T2  - Berichte der Kernforschungsanlage Jülich
SP  - 95,[60] p
PY  - 1978
N1  - Record converted from JUWEL: 18.07.2013
AB  - The atmospheric cycles of nitrogenous trace compounds for the Northern and Southern Hemisphere are discussed . Source strengths and destruction rates for the nitrogen oxides: NO, NO$_{2}$ and HNO$_{3}$ (NO$_{x}$), and ammonia (NH$_{3}$) are given as a function of latitude over continents and oceans. The global amounts of NO$_{x}$-N and NH$_{3}$-N produced annually in the period 1950-1975 (34 $\pm$ 5 x 10$^{12}$ g NO$_{x}$-N/yr and 29 $\pm$ 6 x 10$^{12}$ g NH$_{3}$-N/yr) are much less than previously assumed . Globally, natural and anthropogenic emissions are of similar magnitude. The NO$_{x}$ emission from anthropogenic sources is 1.5 times that from natural processes in the Northern Hemisphere whereas in the Southern Hemisphere it is a factor of 3 or 4 less. More than 80% of atmospheric ammonia seems to be derived from excrements of domestic animals, mainly cattle. Atmospheric NO$_{x}$ and NH$_{3}$ are removed from the atmosphere mostly by bulk deposition : 24 $\pm$ 9 x 10$^{12}$ g N0$^{-}_{3}$-N/yr and 21 $\pm$ 9 x 10$^{12}$ g NH$^{+}_{4}$-N/yr. Another fraction may be removed by absorption on vegetation and bare soils and, in the case of ammonia, by oxidation within the atmosphere.
LB  - PUB:(DE-HGF)29
UR  - https://juser.fz-juelich.de/record/136080
ER  -