EVIDENCE FOR THE REMOVAL OF GASEOUS HNO3 INSIDE THE ARCTIC POLAR VORTEX IN JANUARY 1992

Authors
HOPFNER M BLOM CE BLUMENSTOCK T FISCHER H GULDE T
Citation
M. Hopfner et al., EVIDENCE FOR THE REMOVAL OF GASEOUS HNO3 INSIDE THE ARCTIC POLAR VORTEX IN JANUARY 1992, Geophysical research letters, 23(2), 1996, pp. 149-152
Citations number
23
Categorie Soggetti
Geosciences, Interdisciplinary
Journal title
Geophysical research letters → ACNP
ISSN journal
00948276
Volume
23
Issue
2
Year of publication
1996
Pages
149 - 152
Database
ISI
SICI code
0094-8276(1996)23:2<149:EFTROG>2.0.ZU;2-W
Abstract
Unexpectedly low column amounts of HNO3 (1.3x10(16) cm(-2)) inside the Arctic polar vortex were obtained on January 9, 1992 by airborne FTIR emission measurements. After correction for dynamic variations it is concluded that about 40% of the column HNO3 had been removed from the gas phase. The observed depletion is consistent with a nearly equilibr ium saturation of HNO3 over nitric acid trihydrate. It cannot be expla ined by the uptake of HNO3 in ternary H2SO4/H2O/HNO3 mixtures.