A Physically Based Subgrid Parameterization for the Production and Maintenance of Mixed-Phase Clouds in a General Circulation Model

作     者：Furtado, K. Field, P. R. Boutle, I. A. Morcrette, C. J. Wilkinson, J. M. 

作者机构：Met Off Exeter EX1 3PB Devon England 

出 版 物：《JOURNAL OF THE ATMOSPHERIC SCIENCES》 (大气科学杂志)

年 卷 期：2016年第73卷第1期

页      面：279-291页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：NASA AMSR-E Science Team NASA Earth Science MEaSUREs Program 

主　　题：Physical Meteorology and Climatology Cloud water phase Condensation Models and modeling Cloud parameterizations Subgrid-scale processes 

摘      要：A physically based method for parameterizing the role of subgrid-scale turbulence in the production and maintenance of supercooled liquid water and mixed-phase clouds is presented. The approach used is to simplify the dynamics of supersaturation fluctuations to a stochastic differential equation that can be solved analytically, giving increments to the prognostic liquid cloud fraction and liquid water content fields in a general circulation model (GCM). Elsewhere, it has been demonstrated that the approach captures the properties of decameter-resolution large-eddy simulations of a turbulent mixed-phase environment. In this paper, it is shown that it can be implemented in a GCM, and the effects that this has on Southern Ocean biases and on Arctic stratus are investigated.