Evaluation of a GCM subgrid cloud-radiation interaction parameterization using cloud-resolving model simulations

Details Evaluation of a GCM subgrid cloud-radiation interaction parameterization using cloud-resolving model simulations Evaluation of a GCM subgrid cloud-radiation interaction parameterization using cloud-resolving model simulations

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3206801l&link_type=abstract

Geophysical Research Letters, Volume 32, Issue 6, CiteID L06801

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Atmospheric Composition And Structure: Cloud/Radiation Interaction, Atmospheric Processes: Radiative Processes, Atmospheric Processes: Global Climate Models (1626, 4928), Atmospheric Processes: Clouds And Cloud Feedbacks

Scientific paper

The mosaic approach of Liang and Wang (1997) for the general circulation model (GCM) parameterization of subgrid cloud-radiation interactions is evaluated against the validated cloud-resolving model (CRM) simulation of the Atmospheric Radiation Measurement (ARM) intensive observation period (IOP, June 22-July 17, 1997) at the Southern Great Plains (SGP) site. The CRM-generated cloud statistics determines the required characteristic structure differences between three primary cloud genera (convective, anvil and stratiform). It is demonstrated that the mosaic approach with the CRM cloud statistics well simulates the CRM domain-averaged radiative quantities. The result indicates that the mosaic approach of the cloud overlap based on the cloud genera differing in formation mechanisms and of the optical inhomogeneity by cloud water path scaling can capture, respectively, the dominant effects of the cloud geometric association and optical property variability within a GCM grid.

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