Treatment of LW and SW Radiative Processes in a Climate GCM
Abstract
Of the physical processes that convert, transport, and redistribute energy within the climate system, radiation is by far the fastest. Radiation is also the best understood of these physical processes and therefore the most amenable for accurate parameterization. As an illustrative example, we describe the radiative modeling treatment of the LW and SW radiation in the GISS ModelE climate GCM and its comparison to LBL calculated heating and cooling rates, including radiative forcing sensitivity. We also compare and analyze the spectral and height dependence of he radiative forcing sensitivity for the principal greenhouse gases based on 1-D LBL radiative/convective equilibrium calculations. We also describe the ModelE LW flux parameterization to account for multiple scattering effects for LW TOA and BOA fluxes, and the laboratory based parameterization scheme for modeling the relative humidity dependence of aerosol radiative properties for hygroscopic aerosol species.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2010
- Bibcode:
- 2010AGUFM.A23A0216L
- Keywords:
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- 0360 ATMOSPHERIC COMPOSITION AND STRUCTURE / Radiation: transmission and scattering;
- 1610 GLOBAL CHANGE / Atmosphere;
- 3337 ATMOSPHERIC PROCESSES / Global climate models;
- 3359 ATMOSPHERIC PROCESSES / Radiative processes