This title appears in the Scientific Report :
2010
Please use the identifier:
http://dx.doi.org/10.5194/acp-10-121-2010 in citations.
Please use the identifier: http://hdl.handle.net/2128/10069 in citations.
Annual cycle of ozone at and above the tropical tropopause: observations versus simulations with the Chemical Model of the Stratosphere (CLaMS)
Annual cycle of ozone at and above the tropical tropopause: observations versus simulations with the Chemical Model of the Stratosphere (CLaMS)
Multi-annual simulations with the Chemical Lagrangian Model of the Stratosphere (CLaMS) were conducted to study the seasonality of O-3 within the stratospheric part of the tropical tropopause layer (TTL), i.e. above theta = 360K potential temperature level. In agreement with satellite (HALOE) and in...
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Personal Name(s): | Konopka, P. |
---|---|
Grooß, J.-U. / Günther, G. / Plöger, F. / Pommrich, R. / Müller, R. / Livesey, N. | |
Contributing Institute: |
Stratosphäre; ICG-1 |
Published in: | Atmospheric chemistry and physics, 10 (2010) S. 121 - 132 |
Imprint: |
Katlenburg-Lindau
EGU
2010
|
Physical Description: |
121 - 132 |
DOI: |
10.5194/acp-10-121-2010 |
Document Type: |
Journal Article |
Research Program: |
Atmosphäre und Klima |
Series Title: |
Atmospheric Chemistry and Physics
10 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10069 in citations.
Multi-annual simulations with the Chemical Lagrangian Model of the Stratosphere (CLaMS) were conducted to study the seasonality of O-3 within the stratospheric part of the tropical tropopause layer (TTL), i.e. above theta = 360K potential temperature level. In agreement with satellite (HALOE) and in-situ observations (SHADOZ), CLaMS simulations show a pronounced annual cycle in O-3, at and above theta = 380 K, with the highest mixing ratios in the late boreal summer. Within the model, this cycle is driven by the seasonality of both upwelling and in-mixing. The latter process occurs through enhanced horizontal transport from the extratropics into the TTL that is mainly driven by the meridional, isentropic winds. The strongest in-mixing occurs during the late boreal summer from the Northern Hemisphere in the potential temperature range between 370 and 420 K. Complementary, the strongest upwelling occurs in winter reducing O-3 to the lowest values in early spring. Both CLaMS simulations and Aura MLS O-3 observations consistently show that enhanced in-mixing in summer is mainly driven by the Asian monsoon anticyclone. |