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Multimodel assessment of the upper troposphere and lower stratosphere: Extratropics

Hegglin, Michaela and Gettelman, Andrew and Hoor, P. and Krichevsky, R. and Manney, G.L. and Pan, L.L and Son, S.-W. and Stiller, G. and Tilmes, S. and Walker, K.A. and Eyring, Veronika and Shepherd, T.G. and Waugh, D. and Akiyoshi, H. and Añel, A.J. and Austin, J. and Baumgaertner, A. and Bekki, S. and Braesicke, P. and Brühl, C. and Butchart, N. and Chipperfield, M. and Dameris, Martin and Dhomse, S. and Frith, S. and Garny, Hella and Hardiman, S.C. and Jöckel, Patrick and Kinnison, D.E. and Lamarque, J.F. and Mancini, E. and Michou, M. and Morgenstern, O. and Nakamura, T. and Olivié, D. and Pawson, S. and Pitari, G. and Plummer, D.A. and Pyle, J.A. and Rozanov, E. and Scinocca, J.F. and Shibata, K. and Smale, D. and Teyssèdre, H. and Tian, W. and Yamashita, Y. (2010) Multimodel assessment of the upper troposphere and lower stratosphere: Extratropics. Journal of Geophysical Research, 115 (D00M09), pp. 1-24. DOI: 10.1029/2010JD013884. ISSN 0148-0227.

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Official URL: http://www.agu.org/journals/jd/jd1020/2010JD013884/2010JD013884.pdf

Abstract

A multimodel assessment of the performance of chemistry�climate models (CCMs) in the extratropical upper troposphere/lower stratosphere (UTLS) is conducted for the first time. Process�oriented diagnostics are used to validate dynamical and transport characteristics of 18 CCMs using meteorological analyses and aircraft and satellite observations. The main dynamical and chemical climatological characteristics of the extratropical UTLS are generally well represented by the models, despite the limited horizontal and vertical resolution. The seasonal cycle of lowermost stratospheric mass is realistic, however with a wide spread in its mean value. A tropopause inversion layer is present in most models, although the maximum in static stability is located too high above the tropopause and is somewhat too weak, as expected from limited model resolution. Similar comments apply to the extratropical tropopause transition layer. The seasonality in lower stratospheric chemical tracers is consistent with the seasonality in the Brewer�Dobson circulation. Both vertical and meridional tracer gradients are of similar strength to those found in observations. Models that perform less well tend to use a semi�Lagrangian transport scheme and/or have a very low resolution. Two models, and the multimodel mean, score consistently well on all diagnostics, while seven other models score well on all diagnostics except the seasonal cycle of water vapor. Only four of the models are consistently below average. The lack of tropospheric chemistry in most models limits their evaluation in the upper troposphere. Finally, the UTLS is relatively sparsely sampled by observations, limiting our ability to quantitatively evaluate many aspects of model performance.

Document Type:Article
Title:Multimodel assessment of the upper troposphere and lower stratosphere: Extratropics
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID
Hegglin, MichaelaUni Toronto, Toronto, Ontario, CNDUNSPECIFIED
Gettelman, AndrewNCAR, Boulder, CO, USAUNSPECIFIED
Hoor, P.MPI für Chemie, MainzUNSPECIFIED
Krichevsky, R.Univ. of Toronto, Toronto, Ontario, CNDUNSPECIFIED
Manney, G.L.California Inst. of Technology, Pasadena, CA, USAUNSPECIFIED
Pan, L.LNCAR, Boulder, CO, USAUNSPECIFIED
Son, S.-W.McGill Univ., Montreal, Quebec, CNDUNSPECIFIED
Stiller, G.Inst. for Meteorology and Climate Research, KarlsruheUNSPECIFIED
Tilmes, S.NCAR, Boulder, CO, USAUNSPECIFIED
Walker, K.A.Uni Toronto, Toronto, Ontario, CNDUNSPECIFIED
Eyring, VeronikaDLR, IPAUNSPECIFIED
Shepherd, T.G.Uni Toronto, Toronto, Ontario, CNDUNSPECIFIED
Waugh, D.Johns Hopkins Univ., Baltimore, MD, USAUNSPECIFIED
Akiyoshi, H.UNSPECIFIEDUNSPECIFIED
Añel, A.J.UNSPECIFIEDUNSPECIFIED
Austin, J.UNSPECIFIEDUNSPECIFIED
Baumgaertner, A.UNSPECIFIEDUNSPECIFIED
Bekki, S.UNSPECIFIEDUNSPECIFIED
Braesicke, P.UNSPECIFIEDUNSPECIFIED
Brühl, C.UNSPECIFIEDUNSPECIFIED
Butchart, N.UNSPECIFIEDUNSPECIFIED
Chipperfield, M.UNSPECIFIEDUNSPECIFIED
Dameris, MartinDLR, IPAUNSPECIFIED
Dhomse, S.UNSPECIFIEDUNSPECIFIED
Frith, S.UNSPECIFIEDUNSPECIFIED
Garny, HellaDLR, IPAUNSPECIFIED
Hardiman, S.C.UNSPECIFIEDUNSPECIFIED
Jöckel, PatrickDLR, IPAUNSPECIFIED
Kinnison, D.E.UNSPECIFIEDUNSPECIFIED
Lamarque, J.F.UNSPECIFIEDUNSPECIFIED
Mancini, E.UNSPECIFIEDUNSPECIFIED
Michou, M.UNSPECIFIEDUNSPECIFIED
Morgenstern, O.UNSPECIFIEDUNSPECIFIED
Nakamura, T.UNSPECIFIEDUNSPECIFIED
Olivié, D.UNSPECIFIEDUNSPECIFIED
Pawson, S.UNSPECIFIEDUNSPECIFIED
Pitari, G.UNSPECIFIEDUNSPECIFIED
Plummer, D.A.UNSPECIFIEDUNSPECIFIED
Pyle, J.A.UNSPECIFIEDUNSPECIFIED
Rozanov, E.UNSPECIFIEDUNSPECIFIED
Scinocca, J.F.UNSPECIFIEDUNSPECIFIED
Shibata, K.UNSPECIFIEDUNSPECIFIED
Smale, D.UNSPECIFIEDUNSPECIFIED
Teyssèdre, H.UNSPECIFIEDUNSPECIFIED
Tian, W.UNSPECIFIEDUNSPECIFIED
Yamashita, Y.UNSPECIFIEDUNSPECIFIED
Date:2010
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:115
DOI:10.1029/2010JD013884
Page Range:pp. 1-24
ISSN:0148-0227
Status:Published
Keywords:TTL, chemistry-climate models, CCMVal
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: Dameris, Prof. Dr. rer. nat. Martin
Deposited On:25 Oct 2010 17:18
Last Modified:15 Apr 2016 09:10

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