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The SPARC water vapour assessment II: comparison of annual, semi-annual and quasi-biennial variations in stratospheric and lower mesospheric water vapour observed from satellites

Lossow, Stefan; Khosrawi, Farahnaz; Nedoluha, Gerald E.; Azam, Faiza; Bramstedt, Klaus; Burrows, John. P.; Dinelli, Bianca M.; Eriksson, Patrick; Espy, Patrick J.; García-Comas, Maya; Gille, John C.; Kiefer, Michael; Noël, Stefan; Raspollini, Piera; Read, William G.; Rosenlof, Karen H.; Rozanov, Alexei; Sioris, Christopher E.; Stiller, Gabriele P.; Walker, Kaley A.; ... mehr

Abstract:
In the framework of the second SPARC (Stratosphere-troposphere Processes And their Role in Climate) water vapour assessment (WAVAS-II), the amplitudes and phases of the annual, semi-annual and quasi-biennial variation in stratospheric and lower mesospheric water were compared using 30 data sets from 13 different satellite instruments. These comparisons aimed to provide a comprehensive overview of the typical uncertainties in the observational database which can be considered in subsequent observational and modelling studies. For the amplitudes, a good agreement of their latitude and altitude distribution was found. Quantitatively there were differences in particular at high latitudes, close to the tropopause and in the lower mesosphere. In these regions, the standard deviation over all data sets typically exceeded 0.2 ppmv for the annual variation and 0.1 ppmv for the semi-annual and quasi-biennial variation. For the phase, larger differences between the data sets were found in the lower mesosphere. Generally the smallest phase uncertainties can be observed in regions where the amplitude of the variability is large. The standard dev ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator DOI: 10.5194/amt-10-1111-2017
ISSN: 1867-8548, 1867-1381
URN: urn:nbn:de:swb:90-679176
KITopen ID: 1000067917
HGF-Programm 12.04.05; LK 01
Erschienen in Atmospheric measurement techniques
Band 10
Heft 3
Seiten 1111–1137
Lizenz CC BY 3.0 DE: Creative Commons Namensnennung 3.0 Deutschland
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
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