A mountain-induced moist baroclinic wave test case for the dynamical cores of atmospheric general circulation models

被引：2

作者：

Hughes, Owen K. ^{[1
]}

Jablonowski, Christiane ^{[1
]}

机构：

[1] Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48103 USA

来源：

GEOSCIENTIFIC MODEL DEVELOPMENT | 2023年 / 16卷 / 22期

基金：

美国国家科学基金会; 美国海洋和大气管理局;

关键词：

TERRAIN-FOLLOWING COORDINATE; SHALLOW-WATER EQUATIONS; EFFECTIVE RESOLUTION; STANDARD TEST; SIMULATION; CLIMATE; SPHERE; FRAMEWORK; DCMIP2016; CYCLONE;

D O I：

10.5194/gmd-16-6805-2023

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Idealized test cases for the dynamical cores of atmospheric general circulation models are informative tools to assess the accuracy of the numerical designs and investigate the general characteristics of atmospheric motions. A new test case is introduced that is built upon a baroclinically unstable base state with an added orographic barrier. The topography is analytically prescribed and acts as a trigger of both baroclinic Rossby waves and inertia-gravity waves on a rotating, regular-sized planet. Both dry and idealized moist configurations are suggested. The latter utilizes the Kessler warm-rain precipitation scheme. The test case enhances the complexity of the existing test suite hierarchy and focuses on the impacts of two midlatitudinal mountain ridges on the circulation. Selected simulation examples from four dynamical cores are shown. These are the Spectral Element and Finite Volume dynamical cores, which are part of the National Center for Atmospheric Research (NCAR) Community Earth System Model (CESM), versions 2.1.3 and 2.2, and the Cubed-Sphere Finite Volume dynamical cores, which is new to CESM version 2.2. In addition, the Model for Prediction Across Scales (MPAS) is tested. The overall flow patterns agree well in the four dynamical cores, but the details can vary greatly. The examples highlight the broad palette of use cases for the test case and reveal physics-dynamics coupling issues.

引用

页码：6805 / 6831

页数：27

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