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Towards a better representation of the solar cycle in general circulation models

Nissen, Katrin and Matthes, Katja and Langematz, Ulrike and Mayer, Bernhard (2007) Towards a better representation of the solar cycle in general circulation models. Atmospheric Chemistry and Physics, 7, pp. 5391-5400.

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Official URL: http://www.atmos-chem-phys.net/7/5391/2007/


We introduce the improved Freie Universität Berlin (FUB) high-resolution radiation scheme FUBRad and compare it to the 4-band standard ECHAM5 SW radiation scheme of Fouquart and Bonnel (FB). Both schemes are validated against the detailed radiative transfer model libRadtran. FUBRad produces realistic heating rate variations during the solar cycle. The SW heating rate response with the FB scheme is about 20 times smaller than with FUBRad and cannot produce the observed temperature signal. A reduction of the spectral resolution to 6 bands for solar irradiance and ozone absorption cross sections leads to a degradation (reduction) of the solar SW heating rate signal by about 20%. The simulated temperature response agrees qualitatively well with observations in the summer upper stratosphere and mesosphere where irradiance variations dominate the signal. Comparison of the total short-wave heating rates under solar minimum conditions shows good agreement between FUBRad, FB and libRadtran up to the middle mesosphere (60–70 km) indicating that both parameterizations are well suited for climate integrations that do not take solar variability into account. The FUBRad scheme has been implemented as a sub-submodel of the Modular Earth Submodel System (MESSy).

Document Type:Article
Title:Towards a better representation of the solar cycle in general circulation models
AuthorsInstitution or Email of Authors
Nissen, KatrinFU Berlin, Berlin
Matthes, KatjaFU Berlin, Berlin
Langematz, UlrikeFU Berlin, Berlin
Mayer, BernhardUNSPECIFIED
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 5391-5400
Keywords:climate model, radiation, radiative transfer, solar cycle
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 Remote Sensing
Deposited By: Dr.rer.nat. Bernhard Mayer
Deposited On:06 Dec 2007
Last Modified:20 Oct 2014 14:32

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