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The tropical tropopause layer 1960-2100

Gettelman, Andrew and Birner, Thomas and Eyring, Veronika and Akiyoshi, H. and Bekki, Slimane and Brühl, Christoph and Dameris, Martin and Kinnison, Douglas and Lefevre, Frank and Lott, Francois and Mancini, Eva and Pitari, Giovanni and Plummer, D.A. and Rozanov, Eugene and Shibata, K. and Stenke, Andrea and Struthers, Hamish and Tian, W. (2009) The tropical tropopause layer 1960-2100. Atmospheric Chemistry and Physics, 9, pp. 1621-1637.

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Official URL: http://www.atmos-chem-phys.net/9/1621/2009/


The representation of the Tropical Tropopause Layer (TTL) in 13 different Chemistry Climate Models (CCMs) designed to represent the stratosphere is analyzed. Simulations for 1960�2005 and 1980�2100 are analyzed. Simulations for 1960�2005 are compared to reanalysis model output. CCMs are able to reproduce the basic structure of the TTL. There is a large (10 K) spread in annual mean tropical cold point tropopause temperatures. CCMs are able to reproduce historical trends in tropopause pressure obtained from reanalysis products. Simulated historical trends in cold point tropopause temperatures are not consistent across models or reanalyses. The pressure of both the tropical tropopause and the level of main convective outflow appear to have decreased (increased altitude) in historical runs as well as in reanalyses. Decreasing pressure trends in the tropical tropopause and level of main convective outflow are also seen in the future. Models consistently predict decreasing tropopause and convective outflow pressure, by several hPa/decade. Tropical cold point temperatures are projected to increase by 0.09 K/decade. Tropopause anomalies are highly orrelated with tropical surface temperature anomalies and with tropopause level ozone anomalies, less so with stratospheric temperature anomalies. Simulated stratospheric water vapor at 90 hPa increases by up to 0.5�1 ppmv by 2100. The result is consistent with the simulated increase in temperature, highlighting the correlation of tropopause temperatures with stratospheric water vapor.

Document Type:Article
Title:The tropical tropopause layer 1960-2100
AuthorsInstitution or Email of Authors
Gettelman, AndrewNCAR Boulder, CO, USA
Birner, ThomasUniv. Toronto, ON, CND
Eyring, VeronikaUNSPECIFIED
Akiyoshi, H.National Inst. for Environmental Studies, Tsukuba, J
Bekki, SlimaneCNRS IPSL, Paris, F
Brühl, ChristophMPI für Chemie, Mainz
Dameris, MartinUNSPECIFIED
Kinnison, DouglasNCAR Boulder, CO, USA
Lefevre, FrankUniv. Pierre and Marie Curie, Paris, F
Lott, FrancoisEcole Normale Superieur, Paris, F
Mancini, EvaDipartimento di Fisica, L'Aquila, I
Pitari, GiovanniUniv. L'Aquila, Dipartimento di Fisica, L'Aquila, I
Plummer, D.A.Environment Canada, Toronto, CND
Rozanov, EugeneObservatorium Davos, CH
Shibata, K.Meteorological Research Inst., Tsukuba, J
Struthers, HamishNIWA, Lauder, NZ
Tian, W.Univ. of Leeds, Leeds, UK
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 1621-1637
Keywords:CCM, UTLS, cold point temperature
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Prof. Dr. rer. nat. Martin Dameris
Deposited On:03 Dec 2009 17:13
Last Modified:12 Dec 2013 20:46

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