Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0465.1 |
Defining Sudden Stratospheric Warming in Climate Models: Accounting for Biases in Model Climatologies | |
Kim, Junsu1,2,5; Son, Seok-Woo2; Gerber, Edwin P.3; Park, Hyo-Seok4 | |
2017-07-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:14 |
文章类型 | Article |
语种 | 英语 |
国家 | South Korea; USA |
英文摘要 | A sudden stratospheric warming (SSW) is often defined as zonal-mean zonal wind reversal at 10 hPa and 60 degrees N. This simple definition has been applied not only to the reanalysis data but also to climate model output. In the present study, it is shown that the application of this definition to models can be significantly influenced by model mean biases (i.e., more frequent SSWs appear to occur in models with a weaker climatological polar vortex). To overcome this deficiency, a tendency-based definition is proposed and applied to the multimodel datasets archived for phase 5 of the Coupled Model Intercomparison Project (CMIP5). In this definition, SSW-like events are defined by sufficiently strong vortex deceleration. This approach removes a linear relationship between SSW frequency and intensity of the climatological polar vortex in the CMIP5 models. The models' SSW frequency instead becomes significantly correlated with the climatological upward wave flux at 100 hPa, a measure of interaction between the troposphere and stratosphere. Lower stratospheric wave activity and downward propagation of stratospheric anomalies to the troposphere are also reasonably well captured. However, in both definitions, the high-top models generally exhibit more frequent SSWs than the low-top models. Moreover, a hint of more frequent SSWs in a warm climate is found in both definitions. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404018600021 |
WOS关键词 | QUASI-BIENNIAL OSCILLATION ; POLAR VORTEX ; WINTER STRATOSPHERE ; NORTHERN-HEMISPHERE ; MIDDLE ATMOSPHERE ; PART I ; VARIABILITY ; CIRCULATION |
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/19891 |
专题 | 气候变化 |
作者单位 | 1.Seoul Natl Univ, Numer Modeling Ctr, Adv Modeling Infrastruct Team, Seoul, South Korea; 2.Seoul Natl Univ, Sch Earth & Environm Sci, Seoul, South Korea; 3.NYU, Courant Inst Math Sci, New York, NY USA; 4.Korea Inst Geosci & Mineral Resources, Daejeon, South Korea; 5.Numer Modeling Ctr, Adv Modeling Infrastruct Team, Seoul, South Korea |
推荐引用方式 GB/T 7714 | Kim, Junsu,Son, Seok-Woo,Gerber, Edwin P.,et al. Defining Sudden Stratospheric Warming in Climate Models: Accounting for Biases in Model Climatologies[J]. JOURNAL OF CLIMATE,2017,30(14). |
APA | Kim, Junsu,Son, Seok-Woo,Gerber, Edwin P.,&Park, Hyo-Seok.(2017).Defining Sudden Stratospheric Warming in Climate Models: Accounting for Biases in Model Climatologies.JOURNAL OF CLIMATE,30(14). |
MLA | Kim, Junsu,et al."Defining Sudden Stratospheric Warming in Climate Models: Accounting for Biases in Model Climatologies".JOURNAL OF CLIMATE 30.14(2017). |
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