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Long-range transport pathways of tropospheric source gases originating in Asia into the northern lower stratosphere during the Asian monsoon season 2012

Vogel, B.; Günther, G.; Müller, R.; Grooß, J.U.; Afchine, A.; Bozem, H.; Hoor, P.; Krämer, M.; Müller, S.; Riese, M.; Rolf, C.; Spelten, N.; Stiller, G. P.; Ungermann, J.; Zahn, A.

Abstract:
Global simulations with the Chemical Lagrangian Model of the Stratosphere (CLaMS) using artificial tracers of air mass origin are used to analyze transport mechanisms from the Asian monsoon region into the lower stratosphere. In a case study, the transport of air masses from the Asian monsoon anticyclone originating in India/China by an eastward-migrating anticyclone which broke off from the main anticyclone on 20 September 2012 and filaments separated at the northeastern flank of the anticyclone are analyzed. Enhanced contributions of young air masses (younger than 5 months) are found within the separated anticyclone confined at the top by the thermal tropopause. Further, these air masses are confined by the anticyclonic circulation and, on the polar side, by the subtropical jet such that the vertical structure resembles a bubble within the upper troposphere. Subsequently, these air masses are transported eastwards along the subtropical jet and enter the lower stratosphere by quasi-horizontal transport in a region of double tropopauses most likely associated with Rossby wave breaking events. As a result, thin filaments with enhance ... 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-16-15301-2016
ISSN: 1680-7316, 1680-7324
URN: urn:nbn:de:swb:90-655830
KITopen ID: 1000065583
HGF-Programm 12.03.01; LK 01
Erschienen in Atmospheric chemistry and physics
Band 16
Heft 23
Seiten 15301-15325
Lizenz CC BY 3.0 DE: Creative Commons Namensnennung 3.0 Deutschland
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