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UARS measurements of CIO and NO 2 at 40 and 46 km and implications for the model “ozone deficit”
Author(s) -
Dessler A. E.,
Kawa S. R.,
Considine D. B.,
Waters J. W.,
Froidevaux L.,
Kumer J. B.
Publication year - 1996
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 - 10.1029/96gl00154
Subject(s) - stratosphere , ozone , atmospheric sciences , atmosphere (unit) , environmental science , satellite , tracer , box model , atmospheric chemistry , ozone depletion , meteorology , physics , nuclear physics , astronomy
We present the first diurnally‐resolved measurements of ClO and NO 2 at 3.1 and 1.4 hPa, approximately 40 and 46 km. Comparisons between the measurements of ClO and a zero‐dimensional box model utilizing standard photochemistry and constrained by Upper Atmosphere Research Satellite (UARS) tracer measurements show that photochemical models overpredict ClO by a factor of two or more at 3.1 hPa and by a factor of 1.5–2.0 at 1.4 hPa. NO 2 is well simulated by the model at 3.1 hPa, but systematically overestimated at 1.4 hPa. The model overestimate of ClO results in an overestimate of ozone loss in the upper stratosphere of 10–40%.