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An Examination of the Inorganic Chlorine Budget in the Lower StratosphereWe use the first simultaneous in situ measurements of ClONO2, ClO, and HCl acquired using the NASA ER-2 aircraft during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) mission to test whether these three compounds quantitatively account for total inorganic chlorine (Cly) in the lower stratosphere in 1997. We find (ClO + ClONO2 + HCl)/Cly = 0.92 +/- 0.10, where Cly is inferred from in situ measurements of organic chlorine source gases. These observations are consistent with our current understanding of the budget and partitioning of Cly in the lower stratosphere. We find no evidence in support of missing inorganic chlorine species that compose a significant fraction of Cly. We apply the analysis to earlier ER-2 observations dating from 1991 to investigate possible causes of previously observed discrepancies in the inorganic chlorine budget. Using space shuttle, satellite, balloon, and aircraft measurements in combination with ER-2 data, we find that the discrepancy is unlikely to have been caused by missing chlorine species or an error in the photolysis rate of chlorine nitrate. We also find that HCl/Cly is not significantly controlled by aerosol surface area density in the lower stratosphere.
Document ID
20010064080
Acquisition Source
Headquarters
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bonne, G. P.
(Harvard Univ. Cambridge, MA United States)
Stimpfle, R. M.
(Harvard Univ. Cambridge, MA United States)
Cohen, R. C.
(California Univ. Berkeley, CA United States)
Voss, P. B.
(Harvard Univ. Cambridge, MA United States)
Perkins, K. K.
(Harvard Univ. Cambridge, MA United States)
Anderson, J. G.
(Harvard Univ. Cambridge, MA United States)
Salawitch, R. J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Elkins, J. W.
(National Oceanic and Atmospheric Administration Boulder, CO United States)
Dutton, G. S.
(National Oceanic and Atmospheric Administration Boulder, CO United States)
Jucks, K. W.
(Smithsonian Astrophysical Observatory Cambridge, MA United States)
Date Acquired
August 20, 2013
Publication Date
January 27, 2000
Publication Information
Publication: Journal of Geophysical Research
Publisher: American Geophysical Union
Volume: 105
Issue: D2
ISSN: 0148-0227
Subject Category
Geophysics
Report/Patent Number
Paper-1999JD900996
Distribution Limits
Public
Copyright
Other

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