Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0368.1 |
Ground-Truth Model Evaluation of Subgrid Orographic Base-Flux Parameterization | |
Garner, Stephen T. | |
2018-10-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:10页码:3653-3670 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | High-resolution simulation can be a powerful means of evaluating and tuning orographic drag schemes, but connecting the parameterized drag, which is a local forcing, with the model drag, which is fundamentally global, is not entirely straightforward. The simplest idea is to filter the velocity down to its divergent component and exploit Bernoulli's law to define a local form drag. Using regional simulations over the Rockies, the Andes, and Greenland, we investigate the validity of this approach, which assumes that both the included nonorographic divergence and the missing orographic deformation will not significantly alter the diagnostic. The local drag is checked for consistency with the nonlocal drag at scales containing most of the gravity wave drag and blocking drag. The agreement is found to be satisfactory unless the drag is weak and nonlinear. In that case, we find it necessary to remove a steady pattern from the nonlocal drag in order to uncover a correlation. We test a specific mountain drag scheme using the proposed diagnostic and describe procedures for tuning the scheme's drag coefficients and treatment of anisotropy. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000450965000001 |
WOS关键词 | GRAVITY-WAVE DRAG ; WEATHER PREDICTION MODELS ; GFDL GLOBAL ATMOSPHERE ; SIMULATIONS ; PARAMETRIZATION ; CLIMATE ; SENSITIVITY ; FORMULATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/29352 |
专题 | 地球科学 |
作者单位 | NOAA, GFDL, Princeton, NJ 08540 USA |
推荐引用方式 GB/T 7714 | Garner, Stephen T.. Ground-Truth Model Evaluation of Subgrid Orographic Base-Flux Parameterization[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(10):3653-3670. |
APA | Garner, Stephen T..(2018).Ground-Truth Model Evaluation of Subgrid Orographic Base-Flux Parameterization.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(10),3653-3670. |
MLA | Garner, Stephen T.."Ground-Truth Model Evaluation of Subgrid Orographic Base-Flux Parameterization".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.10(2018):3653-3670. |
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