Physics
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29p..63n&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 16, pp. 63-1, CiteID 1816, DOI 10.1029/2002GL015000
Physics
Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Cloud Physics And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry
Scientific paper
Extensive populations of large HNO3-containing particles were observed in situ in the 1999-2000 Arctic winter vortex. Assuming nitric acid trihydrate (NAT) composition, the associated values of instantaneous gravitational flux of HNO3 are between 1.108 and 5.1010 molec cm-3 km day-1 and are the largest ever derived from in situ measurements. The relationship between these observed population and observed denitrification in the 1999-2000 Arctic vortex developed using constraints of NAT formation and sedimentation. This analysis of the 1999-2000 winter provides a useful guide to interpreting future observations of polar stratospheric clouds and denitrification in the polar regions.
Bui Paul T.
Fahey David W.
Gao Ru-Shan
Northway Megan J.
Popp Peter J.
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