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Verlagsausgabe
DOI: 10.5445/IR/1000085501
Veröffentlicht am 01.10.2018
Originalveröffentlichung
DOI: 10.5194/amt-11-4707-2018
Scopus
Zitationen: 1

Differences in ozone retrieval in MIPAS channels A and AB: a spectroscopic issue

Glatthor, Norbert; Clarmann, Thomas von; Stiller, Gabriele P.; Kiefer, Michael; Laeng, Alexandra; Dinelli, Bianca M.; Wetzel, Gerald; Orphal, Johannes

Abstract:
Discrepancies in ozone retrievals in MIPAS channels A (685–970cm−1) and AB (1020–1170cm−1) have been a long-standing problem in MIPAS data analysis, amounting to an interchannel bias (AB–A) of up to 8% between ozone volume mixing ratios in the altitude range 30–40km. We discuss various candidate explanations, among them forward model and retrieval algorithm errors, interchannel calibration inconsistencies and spectroscopic data inconsistencies. We show that forward-modelling errors as well as errors in the retrieval algorithm can be ruled out as an explanation because the bias can be reproduced with an entirely independent retrieval algorithm (GEOFIT), relying on a different forward radiative transfer model. Instrumental and calibration issues can also be refuted as an explanation because ozone retrievals based on balloon-borne measurements with a different instrument (MIPAS-B) and an independent level-1 data processing scheme produce a rather similar interchannel bias. Thus, spectroscopic inconsistencies in the MIPAS database used for ozone retrieval are practically the only reason left. To further investigate this issue, we perfor ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2018
Sprache Englisch
Identifikator ISSN: 1867-8548
URN: urn:nbn:de:swb:90-855010
KITopen ID: 1000085501
HGF-Programm 12.04.05; LK 01
Erschienen in Atmospheric measurement techniques
Band 11
Heft 8
Seiten 4707–4723
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 24.08.2018
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