Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0085.1 |
The Modulation of Stationary Waves, and Their Response to Climate Change, by Parameterized Orographic Drag | |
van Niekerk, Annelize1; Scinocca, John F.2; Shepherd, Theodore G.1 | |
2017-08-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Canada |
英文摘要 | The parameterization of orographic drag processes in atmospheric models remains uncertain because of a lack of observational and theoretical constraints on their formulation and free parameters. While previous studies have demonstrated that parameterized orographic drag acting near the surface has a significant impact on the atmospheric circulation, this work follows a more systematic approach to investigate its impacts on the large-scale circulation and the circulation response to climate change. A set of experiments with a comprehensive atmospheric general circulation model is used to ascertain the range of climatological circulations that may arise from parameter uncertainty. It is found that the Northern Hemisphere (NH) wintertime stationary wave field is strongly damped over the North Pacific (NP) and amplified over the North Atlantic (NA) as a result of increased low-level parameterized orographic drag, both of which are shown to be conducive to higher-latitude westerlies. A comparison with the stationary wave field presented in other studies suggests that the too-zonal NA jet and equatorward NP jet biases that are prevalent in climate models may be at least partly due to their representation of orographic drag. The amplitude of the stationary wave response to climate change across the experiments is shown to scale with the magnitude of low-level parameterized orographic drag through its influence on the present-day climatological stationary wave amplitudes over different sectors of the NH, which is consistent with linear stationary wave theory. This work highlights the importance of fidelity in a model's basic state for regional climate change projections. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409133100008 |
WOS关键词 | HEMISPHERE WINTER CIRCULATION ; GENERAL-CIRCULATION ; NORTH-ATLANTIC ; ATMOSPHERIC CIRCULATION ; STRATIFIED FLOW ; MODELS ; PARAMETRIZATION ; VARIABILITY ; STATE ; REPRESENTATION |
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/29380 |
专题 | 地球科学 |
作者单位 | 1.Univ Reading, Dept Meteorol, Reading, Berks, England; 2.Canadian Ctr Climate Modelling & Anal, Victoria, BC, Canada |
推荐引用方式 GB/T 7714 | van Niekerk, Annelize,Scinocca, John F.,Shepherd, Theodore G.. The Modulation of Stationary Waves, and Their Response to Climate Change, by Parameterized Orographic Drag[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(8). |
APA | van Niekerk, Annelize,Scinocca, John F.,&Shepherd, Theodore G..(2017).The Modulation of Stationary Waves, and Their Response to Climate Change, by Parameterized Orographic Drag.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(8). |
MLA | van Niekerk, Annelize,et al."The Modulation of Stationary Waves, and Their Response to Climate Change, by Parameterized Orographic Drag".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.8(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论