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ATMOS/ATLAS-3 Measurements of Stratospheric Chlorine and Reactive Nitrogen Partitioning Inside and Outside the November 1994 Antarctic VortexPartitioning between HCl and ClONO2 and among the main components of the reactive nitrogen family (NO, NO2, HNO3, ClONO2, N2O5, and HO2NO2) has been studied inside and outside the Antarctic stratospheric vortex based on ATMOS profiles measured at sunrise during the 3-12 November 1994 ATLAS-3 Shuttle mission. Elevated mixing ratios of HCl in the lower stratosphere with a peak of approximately 2.9 ppbv (10(exp -9) parts per volume) were measured inside the vortex near 500 K potential temperature (approximately 19 km). Maximum ClONO2 mixing ratios of approximately 1.2, approximately 1.4, and approximately 0.9 ppbv near 700 K (approximately 25 km) were measured inside, at the edge, and outside the vortex, respectively. Model calculations reproduce the higher levels of HCl and NO(x) (NO + NO2) inside the lower stratospheric vortex both driven by photochemical processes initiated by low O3. The high HCl at low O3 results from chemical production of HC1 via the reaction of enhanced Cl with CH4, limited production of ClONO2, and the descent of inorganic chlorine from higher altitudes.
Document ID
19970023220
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Rinsland, C. P.
(NASA Langley Research Center Hampton, VA United States)
Gunson, M. R.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Salawitch, R. J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Michelsen, H. A.
(Harvard Univ. Cambridge, MA United States)
Zander, R.
(Liege Univ. Belgium)
Newchurch, M. J.
(Alabama Univ. Huntsville, AL United States)
Abbas, M. M.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Abrams, M. C.
(Science Applications International Corp. Hampton, VA United States)
Manney, G. L.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Chang, A. Y.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA United States)
Irion, F. W.
(California Inst. of Tech. Pasadena, CA United States)
Goldman, A.
(Denver Univ. Denver, CO United States)
Mahieu, E.
(Liege Univ. Belgium)
Date Acquired
August 17, 2013
Publication Date
August 15, 1996
Publication Information
Publication: ATLAS Series of Shuttle Missions
Volume: 23
Issue: 17
ISSN: 0094-8534
Subject Category
Environment Pollution
Report/Patent Number
Paper-96GL01474
Accession Number
97N23608
Distribution Limits
Public
Copyright
Public Use Permitted.
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