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URN: urn:nbn:de:swb:90-523690
Originalveröffentlichung
DOI: 10.5194/acp-15-9851-2015
Scopus
Zitationen: 9
Web of Science
Zitationen: 9

Is there a solar signal in lower stratospheric water vapour?

Schieferdecker, T.; Lossow, S.; Stiller, G.P.; Clarmann, T.von

Abstract:
A merged time series of stratospheric water vapour built from the Halogen Occultation Instrument (HALOE) and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) data between 60° S and 60° N and 15 to 30 km and covering the years 1992 to 2012 was analysed by multivariate linear regression, including an 11-year solar cycle proxy. Lower stratospheric water vapour was found to reveal a phase-shifted anti-correlation with the solar cycle, with lowest water vapour after solar maximum. The phase shift is composed of an inherent constant time lag of about 2 years and a second component following the stratospheric age of air. The amplitudes of the water vapour response are largest close to the tropical tropopause (up to 0.35 ppmv) and decrease with altitude and latitude. Including the solar cycle proxy in the regression results in linear trends of water vapour being negative over the full altitude/latitude range, while without the solar proxy, positive water vapour trends in the lower stratosphere were found. We conclude from these results that a solar signal seems to be generated at the tropical tropopause which is most li ... mehr


Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator ISSN: 1680-7316
KITopen ID: 1000052369
HGF-Programm 12.04.05; LK 01
Erschienen in Atmospheric Chemistry and Physics
Band 15
Heft 17
Seiten 9851-9863
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