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Global HCFC-22 measurements with MIPAS: Retrieval, validation, global distribution and its evolution over 2005-2012

Chirkov, M.; Stiller, G.P.; Laeng, A.; Kellmann, S.; Clarmann, T.von; Boone, C.D.; 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.; Muhle, J.; O'Doherty, S.; ... mehr

Abstract (englisch):
We report on HCFC-22 data acquired by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) in the reduced spectral resolution nominal observation mode. The data cover the period from January 2005 to April 2012 and the 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 modelled spectra to the measured limb spectral radiances. The spectral ν4-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 rate of linear growth in the lower latitudes lower stratosphere was about 6 to 7 pptv year-1 in the period 2005-2012. The profiles obtained were compared with ACE-FTS satellite data v3.5, as well as with MkIV balloon profiles and 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 MkIV solar occultation balloon-bor ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2016
Sprache Englisch
Identifikator DOI: 10.5194/acp-16-3345-2016
ISSN: 1680-7316
KITopen ID: 1000053440
HGF-Programm 12.04.05; LK 01
Erschienen in Atmospheric Chemistry and Physics
Band 16
Heft 5
Seiten 3345-3368
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
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