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Observation of NO y uptake by particles in the Arctic tropopause region at low temperatures
Author(s) -
Feigl C.,
Schlager H.,
Ziereis H.,
Curtius J.,
Arnold F.,
Schiller C.
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl900338
Subject(s) - tropopause , cirrus , ice cloud , mixing ratio , atmospheric sciences , stratosphere , particle (ecology) , environmental science , gas phase , arctic , analytical chemistry (journal) , chemistry , physics , geology , radiative transfer , environmental chemistry , thermodynamics , optics , oceanography
Measurements of gas‐ and condensed‐phase NO y , HNO 3 , O 3 , and particle concentration and size were performed on 24 January 1997 during POLSTAR on a flight through an ice cloud. In the ice cloud below the tropopause only 2 to 4 pptv particle NO y were detected. The observed average mixing ratio of total HNO 3 is significantly larger than the detected particle NO y . Considering the combined error limits of the NO y and HNO 3 measurements, however, it cannot be ruled out that the observed uptake of NO y was limited by the available gas‐phase HNO 3 . The ratio of total HNO 3 to gaseous NO y measured during the cirrus cloud penetration amounts only to 0.2 in contrast to 0.9 in the stratospheric part of the flight.