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Growth rates of stratospheric HCFC-22

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journal contribution
posted on 2016-02-10, 11:14 authored by David P. Moore, John J. Remedios
The Michelson Interferometer for Passive Atmospheric Sounding onboard ENVISAT (MIPAS-E) offers the opportunity to detect and spectrally resolve many atmospheric minor constituents affecting atmospheric chemistry. In this paper, we describe an algorithm produced to retrieve HCFC–22 profiles from MIPAS-E measurements made in 2003 and present results from this scheme between 300 and 50 mb. By comparison with ATMOS (AT–3) version 3 data, we find a mean Northern Hemisphere mid-latitude (20–50° N) HCFC–22 growth rate between 1994 and 2003 of 5.4±0.7 pptv/yr in the lower stratosphere (LS) and a mean LS Southern Hemisphere growth rate (60–80° S) of 6.0±0.7 pptv/yr in the same period. We test the feasibility of using a global data set to estimate the chemical lifetime of HCFC–22 in the LS and we derive this for two regions: 20–50° N (246±38 years) and 60–80° S (274±34 years). From these data we note a global LS lifetime of 260±25 years, significantly longer than previous estimates.

History

Citation

Atmospheric Chemistry And Physics, 2008, 8 (1), pp. 73-82 (10)

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Physics and Astronomy

Version

  • VoR (Version of Record)

Published in

Atmospheric Chemistry And Physics

Publisher

Copernicus Publications on behalf of the European Geosciences Union

issn

1680-7316

eissn

1680-7324

Acceptance date

2007-12-10

Copyright date

2008

Available date

2016-02-10

Publisher version

http://www.atmos-chem-phys.net/8/73/2008/

Language

en