Explicitly-Coupled Cloud Physics and Radiation Parameterizations and Subsequent Evaluation in WRF High-Resolution Convective Forecasts
Atmospheric Research 168 (2016) 92–104 Contents lists available at ScienceDirect Atmospheric Research journal homepage: www.elsevier.com/locate/atmos Explicitly-coupled cloud physics and radiation parameterizations and subsequent evaluation in WRF high-resolution convective forecasts Gregory Thompson a,⁎,MukulTewaria, Kyoko Ikeda a,SarahTessendorfa, Courtney Weeks a, Jason Otkin b,FanyouKongc a Research Applications Laboratory, National Center for Atmospheric Research, Boulder, CO, USA b Cooperative Institute for Meteorological Satellite Studies, University of Wisconsin-Madison, Madison, WI, USA c Center for Analysis and Prediction of Storms, University of Oklahoma, Norman, OK, USA article info abstract Article history: The impacts of various assumptions of cloud properties represented within a numerical weather prediction Received 1 July 2015 model's radiation scheme are demonstrated. In one approach, the model assumed the radiative effective radii Received in revised form 8 September 2015 of cloud water, cloud ice, and snow were represented by values assigned a priori, whereas a second, “coupled” Accepted 8 September 2015 approach utilized known cloud particle assumptions in the microphysics scheme that evolved during the simu- Available online 18 September 2015 lations to diagnose the radii explicitly. This led to differences in simulated infrared (IR) brightness temperatures, radiative fluxes through clouds, and resulting surface temperatures that ultimately affect model-predicted Keywords: Cloud physics diurnally-driven convection.
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