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Sensitivity of polar stratospheric cloud formation to changes in water vapour and temperature

Khosrawi, F.; Urban, J.; Lossow, S.; Stiller, G.; Weigel, K.; Braesicke, P.; Pitts, M.C.; Rozanov, A.; Burrows, J.P.; Murtagh, D.

More than a decade ago it was suggested that a cooling of stratospheric temperatures by 1gK or an increase of 1gppmv of stratospheric water vapour could promote denitrification, the permanent removal of nitrogen species from the stratosphere by solid polar stratospheric cloud (PSC) particles. In fact, during the two Arctic winters 2009/10 and 2010/11 the strongest denitrification in the recent decade was observed. Sensitivity studies along air parcel trajectories are performed to test how a future stratospheric water vapour (H2O) increase of 1gppmv or a temperature decrease of 1gK would affect PSC formation. We perform our study based on measurements made during the Arctic winter 2010/11. Air parcel trajectories were calculated 6 days backward in time based on PSCs detected by CALIPSO (Cloud Aerosol Lidar and Infrared Pathfinder satellite observations). The sensitivity study was performed on single trajectories as well as on a trajectory ensemble. The sensitivity study shows a clear prolongation of the potential for PSC formation and PSC existence when the temperature in the stratosphere is decreased by 1gK and water vapour is incre ... 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/acp-16-101-2016
ISSN: 1680-7316
URN: urn:nbn:de:swb:90-524434
KITopen ID: 1000052443
HGF-Programm 12.04.03; LK 01
Erschienen in Atmospheric Chemistry and Physics
Band 16
Heft 1
Seiten 101-121
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
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