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The SPARC Data Initiative: Comparisons of CFC-11, CFC-12, HF and SF6 climatologies from international satellite limb sounders

Tegtmeier, S.; Hegglin, M. I.; Anderson, J.; Funke, B.; Gille, J.; Jones, A.; Smith, L.; Von Clarmann, T.; Walker, K. A.

Abstract:
A quality assessment of the CFC-11 (CCl$_{3}$F), CFC-12 (CCl$_{2}$F$_{2}$), HF, and SF$_{6}$ products from limbviewing satellite instruments is provided by means of a detailed intercomparison. The climatologies in the form of monthly zonal mean time series are obtained from HALOE, MIPAS, ACE-FTS, and HIRDLS within the time period 1991–2010. The intercomparisons focus on the mean biases of the monthly and annual zonal mean fields and aim to identify their vertical, latitudinal and temporal structure. The CFC evaluations (based on MIPAS, ACE-FTS and HIRDLS) reveal that the uncertainty in our knowledge of the atmospheric CFC-11 and CFC-12 mean state, as given by satellite data sets, is smallest in the tropics and mid-latitudes at altitudes below 50 and 20 hPa, respectively, with a 1σ multi-instrument spread of up to ±5 %. For HF, the situation is reversed. The two available data sets (HALOE and ACE-FTS) agree well above 100 hPa, with a spread in this region of ±5 to ±10 %, while at altitudes below 100 hPa the HF annual mean state is less well known, with a spread ±30% and larger. The atmospheric SF$_{6}$ annual mean states derived from ... 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/essd-8-61-2016
ISSN: 1866-3508, 1866-3516
URN: urn:nbn:de:swb:90-593837
KITopen ID: 1000059383
HGF-Programm 12.04.05; LK 01
Erschienen in Earth system science data
Band 8
Heft 1
Seiten 61-78
Lizenz CC BY 3.0 DE: Creative Commons Namensnennung 3.0 Deutschland
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