Physics and Dynamics Coupling Across Scales in the Next Generation CESM. Final Report

Bacmeister, Julio T.¹ 

[1] University Corporation for Atmospheric Research (UCAR), Boulder, CO (United States)

关键词: climate modeling;    parameterization;   

DOI  :  10.2172/1184345
RP-ID  :  DOE-UCAR--0006745
PID  :  OSTI ID: 1184345
Others  :  Other: 2011-201

学科分类：地球科学(综合)

美国|英语

来源: SciTech Connect

【 摘 要 】

This project examines physics/dynamics coupling, that is, exchange of meteorological profiles and tendencies between an atmospheric model???s dynamical core and its various physics parameterizations. Most model physics parameterizations seek to represent processes that occur on scales smaller than the smallest scale resolved by the dynamical core. As a consequence a key conceptual aspect of parameterizations is an assumption about the subgrid variability of quantities such as temperature, humidity or vertical wind. Most existing parameterizations of processes such as turbulence, convection, cloud, and gravity wave drag make relatively ad hoc assumptions about this variability and are forced to introduce empirical parameters, i.e., ???tuning knobs??? to obtain realistic simulations. These knobs make systematic dependences on model grid size difficult to quantify.