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| Titel |
Growth rates of stratospheric HCFC-22 |
| VerfasserIn |
D. P. Moore, J. J. Remedios |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 8, no. 1 ; Nr. 8, no. 1 (2008-01-14), S.73-82 |
| Datensatznummer |
250005336
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| Publikation (Nr.) |
 copernicus.org/acp-8-73-2008.pdf |
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| Zusammenfassung |
| 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. |
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