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DOI: 10.5445/IR/1000038940
Veröffentlicht am 27.04.2018
DOI: 10.5194/acp-12-4159-2012
Zitationen: 15
Web of Science
Zitationen: 16

Impact of January 2005 solar proton events on chlorine species

Damiani, A.,; Funke, B.; Marsh, D. R.; López-Puertas, M.; Santee, M. L.; Froidevaux, L.; Wang, S.; Jackman, C. H.; Clarmann, T. von; Gardini, A.; Cordero, R. R.; Storini, M.

Sudden changes in stratospheric chlorine species in the polar northern atmosphere, caused by the Solar Proton Events (SPEs) of 17 and 20 January 2005, have been investigated and compared with version 4 of the Whole Atmosphere Community Climate Model (WACCM4). We used Aura Microwave Limb Sounder (MLS) measurements to monitor the variability of ClO, HCl, HOCl and Michelson Interferometer for Passive Atmospheric Sounder (MIPAS) on ENVISAT to retrieve ClONO2. SPE-induced chlorine activation has been identified. HCl decrease occurred at nearly all the investigated altitudes (i.e., 10–0.5 hPa) with the strongest decrease (of about 0.25 ppbv) on 21 January. HOCl was found to be the main active chlorine species under nighttime conditions (with increases of more than 0.2 ppbv) whereas both HOCl and ClO enhancements (about 0.1 ppbv) have been observed at the polar night terminator. Further, small ClO decreases (of less than 0.1 ppbv) and ClONO2 enhancements (about 0.2 ppbv) have been observed at higher latitudes (i.e., at nighttime) roughly above 2 hPa. While WACCM4 reproduces most of the SPE-induced variability in the chlorine species fairly ... mehr

Zugehörige Institution(en) am KIT Fakultät für Physik (PHYSIK)
Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Publikationstyp Zeitschriftenaufsatz
Jahr 2012
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
URN: urn:nbn:de:swb:90-389406
KITopen ID: 1000038940
HGF-Programm 12.04.03; LK 01
Erschienen in Atmospheric chemistry and physics
Band 12
Seiten 4159-4179
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