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Evaluation of radiation scheme performance within chemistry climate models

Forster, P. M. und Mayer, B. und et, al. (2011) Evaluation of radiation scheme performance within chemistry climate models. Journal of Geophysical Research, 116 (D10302), Seiten 1-26. DOI: 10.1029/2010JD015361

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Offizielle URL: http://www.agu.org/journals/jd/jd1110/2010JD015361/2010JD015361.pdf


This paper evaluates global mean radiatively important properties of chemistry climate models (CCMs). We evaluate stratospheric temperatures and their 1980�2000 trends, January clear sky irradiances, heating rates, and greenhouse gas radiative forcings from an offline comparison of CCM radiation codes with line�by�line models, and CCMs� representation of the solar cycle. CCM global mean temperatures and their change can give an indication of errors in radiative transfer codes and/or atmospheric composition. Biases in the global temperature climatology are generally small, although five out of 18 CCMs show biases in their climatology that likely indicate problems with their radiative transfer codes. Temperature trends also generally agree well with observations, although one model shows significant discrepancies that appear to be due to radiation errors. Heating rates and estimated temperature changes from CO2, ozone, and water vapor changes are generally well modeled. Other gases (N2O, CH4, and CFCs) have only played a minor role in stratospheric temperature change, but their heating rates have large fractional errors in many models. Models that do not account for variations in the spectrum of solar irradiance cannot properly simulate solar�induced variations in stratospheric temperature. The combined long�lived greenhouse gas global annual mean instantaneous net radiative forcing at the tropopause is within 30% of line�by�line models for all CCM radiation codes tested. Problems remain in simulating radiative forcing for stratospheric water vapor and ozone changes with errors between 3% and 200% compared to line by line models. The paper makes recommendations for CCM radiation code developers and future intercomparisons.

Titel:Evaluation of radiation scheme performance within chemistry climate models
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID
Forster, P. M.Univ of Leeds, Leeds, UKNICHT SPEZIFIZIERT
Erschienen in:Journal of Geophysical Research
Referierte Publikation:Ja
In Open Access:Nein
In ISI Web of Science:Ja
DOI :10.1029/2010JD015361
Seitenbereich:Seiten 1-26
Stichwörter:CCM radiation code
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt, Luftfahrt, Verkehr
HGF - Programmthema:Erdbeobachtung, ATM und Flugbetrieb (alt), Verkehrssystem
DLR - Schwerpunkt:Raumfahrt, Luftfahrt, Verkehr
DLR - Forschungsgebiet:R EO - Erdbeobachtung, L AO - Luftverkehrsmanagement und Flugbetrieb, V VS - Verkehrssystem
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Atmosphären- und Klimaforschung, L - Klima, Wetter und Umwelt (alt), V - Verkehrsentwicklung und Umwelt (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Fernerkundung der Atmosphäre
Hinterlegt von: Freund, Jana
Hinterlegt am:15 Dez 2011 13:56
Letzte Änderung:23 Jan 2014 11:36

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