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DOI | 10.1175/JCLI-D-18-0033.1 |
Weakened Anomalous Western North Pacific Anticyclone during an El Nino-Decaying Summer under a Warmer Climate: Dominant Role of the Weakened Impact of the Tropical Indian Ocean on the Atmosphere | |
He, Chao1; Zhou, Tianjun2; Li, Tim3 | |
2019 | |
发表期刊 | JOURNAL OF CLIMATE
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ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2019 |
卷号 | 32期号:1页码:213-230 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The western North Pacific subtropical anticyclone (WNPAC) is the most prominent atmospheric circulation anomaly over the subtropical Northern Hemisphere during the decaying summer of an El Nino event. Based on a comparison between the RCP8.5 and the historical experiments of 30 coupled models from the CMIP5, we show evidence that the anomalous WNPAC during the El Nino-decaying summer is weaker in a warmer climate although the amplitude of the El Nino remains generally unchanged. The weakened impact of the sea surface temperature anomaly (SSTA) over the tropical Indian Ocean (TIO) on the atmosphere is essential for the weakened anomalous WNPAC. In a warmer climate, the warm tropospheric temperature (TT) anomaly in the tropical free troposphere stimulated by the El Nino-related SSTA is enhanced through stronger moist adiabatic adjustment in a warmer mean state, even if the SSTA of El Nino is unchanged. But the amplitude of the warm SSTA over TIO remains generally unchanged in an El Nino-decaying summer, the static stability of the boundary layer over TIO is increased, and the positive rainfall anomaly over TIO is weakened. As a result, the warm Kelvin wave emanating from TIO is weakened because of a weaker latent heating anomaly over TIO, which is responsible for the weakened WNPAC anomaly. Numerical experiments support the weakened sensitivity of precipitation anomaly over TIO to local SSTA under an increase of mean-state SST and its essential role in the weakened anomalous WNPAC, independent of any change in the SSTA. |
英文关键词 | Indian Ocean ENSO Sea surface temperature Coupled models Interannual variability |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453367100001 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; INTERANNUAL VARIABILITY ; INTERDECADAL VARIATIONS ; SST ANOMALIES ; PART I ; ENSO ; MONSOON ; CMIP5 ; TELECONNECTION ; CAPACITOR |
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/19734 |
专题 | 气候变化 |
作者单位 | 1.Jinan Univ, Inst Environm & Climate Res, Guangzhou, Guangdong, Peoples R China; 2.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing, Peoples R China; 3.Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | He, Chao,Zhou, Tianjun,Li, Tim. Weakened Anomalous Western North Pacific Anticyclone during an El Nino-Decaying Summer under a Warmer Climate: Dominant Role of the Weakened Impact of the Tropical Indian Ocean on the Atmosphere[J]. JOURNAL OF CLIMATE,2019,32(1):213-230. |
APA | He, Chao,Zhou, Tianjun,&Li, Tim.(2019).Weakened Anomalous Western North Pacific Anticyclone during an El Nino-Decaying Summer under a Warmer Climate: Dominant Role of the Weakened Impact of the Tropical Indian Ocean on the Atmosphere.JOURNAL OF CLIMATE,32(1),213-230. |
MLA | He, Chao,et al."Weakened Anomalous Western North Pacific Anticyclone during an El Nino-Decaying Summer under a Warmer Climate: Dominant Role of the Weakened Impact of the Tropical Indian Ocean on the Atmosphere".JOURNAL OF CLIMATE 32.1(2019):213-230. |
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