![Hier klicken, um den Treffer aus der Auswahl zu entfernen](images/unchecked.gif) |
Titel |
Monsoon-related transport processes: HCFC-22 as a tracer for East-Asian pollution transport |
VerfasserIn |
Gabriele Stiller, Thomas von Clarmann, Sylvia Kellmann, Maksym Chirkov, Bärbel Vogel, Rolf Müller |
Konferenz |
EGU General Assembly 2016
|
Medientyp |
Artikel
|
Sprache |
en
|
Digitales Dokument |
PDF |
Erschienen |
In: GRA - Volume 18 (2016) |
Datensatznummer |
250128011
|
Publikation (Nr.) |
EGU/EGU2016-7951.pdf |
|
|
|
Zusammenfassung |
East-Asian pollution from Southern China or India was shown to be uplifted effectively by the Asian monsoon system to levels just below the tropopause. HCFC-22 nowadays has it strongest source region within East Asia. Due to its long lifetime in the troposphere, it is a very well suited transport tracer. We compare observations from MIPAS/Envisat of HCFC-22 with results from pollution transport modelling by the Lagrangian chemistry-transport model CLaMS. We find that East Asian pollution (and HCFC-22) is uplifted into the Asian monsoon anticyclone at the Eastern flank of the monsoon system. However, we do not find any indication of a significant transport through the tropopause of the Asian monsoon anticyclone into the stratosphere. In contrast, HCFC-22 is transported southwards into the tropics during the end phase and the break-down of the Asian monsoon anticyclone and distributed zonally in the tropics. By this a maximum layer of HCFC-22 just below the tropical tropopause is formed. Further transport into the stratosphere happens mainly by uplift within the upwelling branch of the Brewer-Dobson circulation. |
|
|
|
|
|