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DOI | 10.1175/JCLI-D-16-0831.1 |
Intermodel Spread around the Kuroshio-Oyashio Extension Region in Coupled GCMs Caused by Meridional Variation of the Westerly Jet from Atmospheric GCMs | |
Zhou, Wenyu; Xie, Shang-Ping | |
2017-06-01 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Kuroshio-Oyashio Extension (KOE) is a region of energetic oceanic mesoscale eddies and vigorous air-sea interaction that can influence climate variability over the northwest Pacific and East Asia. General circulation models (GCMs) exhibit considerable differences in their simulated climatology around the KOE region. Specifically, there are substantial intermodel spreads in both sea surface temperature (SST) and the upper-level westerly jet. In this study, the cause for such large spreads is studied by analyzing 21 pairs of coupled and atmospheric GCMs from phase 5 of the Coupled Model Intercomparison Project (CMIP5). It is found that the intermodel spread of the climatological westerly jet among coupled GCMs is largely inherited from their atmospheric models rather than being due to their SST difference as previously thought. An anomalous equatorward shift in the simulated westerly jet can give rise to a cold SST bias around the KOE region as follows. The equatorward jet shift induces cyclonic surface wind anomalies over the North Pacific, which not only enhance the turbulent heat fluxes out of the ocean south of the KOE but also drive an anomalous cyclonic ocean circulation that brings colder (warmer) water into the north (south) of the KOE. The KOE region is consequently cooled due to both the atmospheric and oceanic effects. Such processes are demonstrated through idealized perturbation experiments using an ocean model. The results herein point to reducing atmospheric model errors in the westerly jet as the way forward to improve the coupled simulations around the KOE region. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000402379600015 |
WOS关键词 | NORTH PACIFIC ; CLIMATE MODELS ; EL-NINO ; SUMMER ; OCEAN ; VARIABILITY ; SIMULATION ; LATITUDE ; THERMOCLINE ; 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/20331 |
专题 | 气候变化 |
作者单位 | Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA |
推荐引用方式 GB/T 7714 | Zhou, Wenyu,Xie, Shang-Ping. Intermodel Spread around the Kuroshio-Oyashio Extension Region in Coupled GCMs Caused by Meridional Variation of the Westerly Jet from Atmospheric GCMs[J]. JOURNAL OF CLIMATE,2017,30(12). |
APA | Zhou, Wenyu,&Xie, Shang-Ping.(2017).Intermodel Spread around the Kuroshio-Oyashio Extension Region in Coupled GCMs Caused by Meridional Variation of the Westerly Jet from Atmospheric GCMs.JOURNAL OF CLIMATE,30(12). |
MLA | Zhou, Wenyu,et al."Intermodel Spread around the Kuroshio-Oyashio Extension Region in Coupled GCMs Caused by Meridional Variation of the Westerly Jet from Atmospheric GCMs".JOURNAL OF CLIMATE 30.12(2017). |
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