Final Technical Report for "Reducing tropical precipitation biases in CESM"

Larson, Vincent¹ 

[1] Univ. of Wisconsin, Milwaukee, WI (United States)

关键词: climate modeling;    cloud parameterization;   

DOI  :  10.2172/1326797
RP-ID  :  DOE-UWM--8668
PID  :  OSTI ID: 1326797

学科分类：环境科学（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

In state-of-the-art climate models, each cloud type is treated using its own separate cloud parameterization and its own separate microphysics parameterization. This use of separate schemes for separate cloud regimes is undesirable because it is theoretically unfounded, it hampers interpretation of results, and it leads to the temptation to overtune parameters. In this grant, we have created a climate model that contains a unified cloud parameterization (???CLUBB???) and a unified microphysics parameterization (???MG2???). In this model, all cloud types --- including marine stratocumulus, shallow cumulus, and deep cumulus --- are represented with a single equation set. This model improves the representation of convection in the Tropics. The model has been compared with ARM observations. The chief benefit of the project is to provide a climate model that is based on a more theoretically rigorous formulation.