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DOI: 10.5445/IR/1000048311
DOI: 10.5194/acpd-15-14783-2015

Global HCFC-22 measurements with MIPAS: retrieval, validation, climatologies and trends

Chirkov, M.; Stiller, G. P.; Laeng, A.; Kellmann, S.; Clarmann, T.von; Boone, C.; Elkins, J. W.; Engel, A.; Glatthor, N.; Grabowski, U.; Harth, C. M.; Kiefer, M.; Kolonjari, F.; Krummel, P. B.; Linden, A.; Lunder, C. R.; Miller, B. R.; Montzka, S. A.; Mühle, J.; O'Doherty, S.; ... mehr

Abstract (englisch):
We report on HCFC-22 data acquired by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) in reduced spectral resolution nominal mode in the period from January 2005 to April 2012 from version 5.02 level-1b spectral data and covering an altitude range from the upper troposphere (above cloud top altitude) to about 50 km. The profile retrieval was performed by constrained nonlinear least squares fitting of measured limb spectral radiances to modelled spectra. The spectral v4-band at 816.5 ± 13 cm-1 was used for the retrieval. A Tikhonov-type smoothing constraint was applied to stabilise the retrieval. In the lower stratosphere, we find a global volume mixing ratio of HCFC-22 of about 185 pptv in January 2005. The linear growth rate in the lower latitudes lower stratosphere was about 6 to 7 pptv yr-1 in the period 2005-2012. The obtained profiles were compared with ACE-FTS satellite data v3.5, as well as with MkIV balloon profiles and in situ cryosampler balloon measurements. Between 13 and 22 km, average agreement within -3 to +5 pptv (MIPAS–ACE) with ACE-FTS v3.5 profiles is demonstrated. Agreement with Mk ... mehr

Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 1680-7367, 1680-7375
URN: urn:nbn:de:swb:90-483115
KITopen-ID: 1000048311
HGF-Programm 12.04.05 (POF III, LK 01)
Erschienen in Atmospheric chemistry and physics / Discussions
Band 15
Heft 10
Seiten 14783-14841
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