KIT | KIT-Bibliothek | Impressum | Datenschutz

Circulation anomalies in the Southern Hemisphere and ozone changes

Braesicke, P.; Keeble, J.; Yang, X.; Stiller, G. ORCID iD icon 1; Kellmann, S. 1; Abraham, N. L.; Archibald, A.; Telford, P.; Pyle, J. A.
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF), Karlsruher Institut für Technologie (KIT)


We report results from two pairs of chemistryclimate model simulations using the same climate model but different chemical perturbations. In each pair of experiments an ozone change was triggered by a simple change in the chemistry. One pair of model experiments looked at the impact of polar stratospheric clouds (PSCs) and the other pair at the impact of short-lived halogenated species on composition and circulation. The model response is complex with both positive and negative changes in ozone concentration, depending on location. These changes result from coupling between composition, temperature and circulation. Even though the causes of the modelled ozone changes are different, the high latitude Southern Hemisphere response in the lower stratosphere is similar. In both pairs of experiments the high-latitude circulation changes, as evidenced by N2O differences, are suggesting a slightly longer-lasting/stronger stratospheric descent in runs with higher ozone destruction (a manifestation of a seasonal shift in the circulation). We contrast the idealised model behaviour with interannual variability in ozone and N2O as observed by the MIPAS instrument on ENVISAT, highlighting similarities of the modelled climate equilibrium changes to the year 2006–2007 in observations. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000066056
Veröffentlicht am 16.04.2018
DOI: 10.5194/acp-13-10677-2013
Zitationen: 26
Web of Science
Zitationen: 22
Zitationen: 33
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2013
Sprache Englisch
Identifikator ISSN: 1680-7324, 1680-7316
KITopen-ID: 1000066056
HGF-Programm 12.04.05 (POF II, LK 01)
Erschienen in Atmospheric chemistry and physics
Verlag European Geosciences Union (EGU)
Band 13
Heft 21
Seiten 10677–10688
Nachgewiesen in Scopus
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page