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URN: urn:nbn:de:swb:90-732006

MIPAS IMK/IAA carbon tetrachloride (CCl₄) retrieval and first comparison with other instruments

Eckert, Ellen; Clarmann, Thomas von; Laeng, Alexandra; Stiller, Gabriele P.; Funke, Bernd; Glatthor, Norbert; Grabowski, Udo; Kellmann, Sylvia; Kiefer, Michael; Linden, Andrea; Babenhauserheide, Arne; Wetzel, Gerald; Boone, Christopher; Engel, Andreas; Harrison, Jeremy J.; Sheese, Patrick E.; Walker, Kaley A.; Bernath, Peter F.

Abstract:
MIPAS thermal limb emission measurements were used to derive vertically resolved profiles of carbon tetrachloride (CCl₄). Level-1b data versions MIPAS/5.02 to MIPAS/5.06 were converted into volume mixing ratio profiles using the level-2 processor developed at Karlsruhe Institute of Technology (KIT) Institute of Meteorology and Climate Research (IMK) and Consejo Superior de Investigaciones Científicas (CSIC), Instituto de Astrofísica de Andalucía (IAA). Consideration of peroxyacetyl nitrate (PAN) as an interfering species, which is jointly retrieved, and CO₂ line mixing is crucial for reliable retrievals. Parts of the CO₂ Q-branch region that overlap with the CCl₄ signature were omitted, since large residuals were still found even though line mixing was considered in the forward model. However, the omitted spectral region could be narrowed noticeably when line mixing was accounted for. A new CCl₄ spectroscopic data set leads to slightly smaller CCl₄ volume mixing ratios. In general, latitude–altitude cross sections show the expected CCl₄ features with highest values of around 90 pptv at altitudes at and below the tropical tropopause ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
URN: urn:nbn:de:swb:90-732006
KITopen ID: 1000073200
Erschienen in Atmospheric measurement techniques
Band 10
Heft 7
Seiten 2727-2743
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
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