Strengthening impacts of spring sea surface temperature in the north tropical Atlantic on Indian Ocean dipole after the mid-1980s | |
Zhang, Guangli3,4; Wang, Xin5,6,7; Xie, Qiang1,2,3; Chen, Jiepeng5,7; Chen, Sheng5,7 | |
刊名 | CLIMATE DYNAMICS |
2022-01-31 | |
卷号 | 1页码:16 |
关键词 | Indian Ocean dipole North tropical Atlantic Three-ocean interactions Global warming |
ISSN号 | 0930-7575 |
DOI | 10.1007/s00382-021-06128-6 |
通讯作者 | Wang, Xin ; Xie, Qiang |
英文摘要 | It is well known that the Indian Ocean dipole (IOD) is closely related to El Nino-Southern Oscillation (ENSO). In this study, it is found that spring-summer north tropical Atlantic (NTA) sea surface temperature (SST) anomalies can contribute to the development of the IOD since the mid-1980s as well as ENSO. After the mid-1980s, an anticyclonic circulation over the subtropical northeastern Pacific could be excited by cool NTA SST anomalies in spring and summer due to a Gill-type Rossby-wave response. A low-level cyclonic circulation appears in the west Pacific in turn. The anomalous lower-level southwesterlies on the southeastern flank of the cyclonic circulation reduce the climatological wind speed, and thus, warm SST anomalies appear and extend to the central tropical Pacific via the wind-evaporation-SST (WES) feedback. As a result, Walker circulation over the Indo-Pacific region is changed, with anomalous descending in the eastern tropical Indian Ocean and ascending in the central tropical Pacific. The descending branch of anomalous Walker circulation generates surface southeasterly wind anomalies along the coast off Sumatra and lifts the thermocline in the eastern tropical Indian Ocean, which produces a positive IOD event in autumn. Such a cross-basin mechanism is supported by a coupled model experiment with warm SST perturbations over the NTA. In contrast, although cold NTA SST anomalies can induce warm SST anomalies in the eastern equatorial Pacific through interhemispheric meridional circulation before the mid-1980s, the responses in the tropical Indian Ocean are rather weak. In addition, the enhancement in the NTA-IOD relationship after the mid-1980s is suggested to result from the changes in the SST mean state under the context of global warming, which is confirmed by two coupled model experiments with different mean SST backgrounds. |
资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB42000000] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA20060502] ; National Natural Science Foundation of China[42006033] ; National Natural Science Foundation of China[41925024] ; National Natural Science Foundation of China[41876021] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0306] ; Independent Research Project Program of State Key Laboratory of Tropical Oceanography[LTOZZ2005] ; Guangdong Natural Science Foundation[2021A1515011368] ; Science and Technology Program of Guangzhou China[202102020384] ; High Performance Computing Division ; China-Sri Lanka Joint Center for Education and Research, Chinese Academy of Sciences |
WOS关键词 | CLIMATE VARIABILITY ; MODE EVENTS ; PACIFIC ; ENSO ; RAINFALL ; IOD ; SST ; TELECONNECTION ; DYNAMICS |
WOS研究方向 | Meteorology & Atmospheric Sciences |
语种 | 英语 |
出版者 | SPRINGER |
WOS记录号 | WOS:000750315300004 |
资助机构 | Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Independent Research Project Program of State Key Laboratory of Tropical Oceanography ; Guangdong Natural Science Foundation ; Science and Technology Program of Guangzhou China ; High Performance Computing Division ; China-Sri Lanka Joint Center for Education and Research, Chinese Academy of Sciences |
内容类型 | 期刊论文 |
版本 | 出版稿 |
源URL | [http://ir.idsse.ac.cn/handle/183446/9338] |
专题 | 深海科学研究部_海洋环流观测与数值模拟研究室 |
通讯作者 | Wang, Xin; Xie, Qiang |
作者单位 | 1.Pilot Natl Lab Marine Sci & Technol, Lab Reg Oceanog & Numer Modeling, Qingdao, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China 5.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou, Peoples R China 6.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, Guangzhou, Peoples R China 7.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Guangli,Wang, Xin,Xie, Qiang,et al. Strengthening impacts of spring sea surface temperature in the north tropical Atlantic on Indian Ocean dipole after the mid-1980s[J]. CLIMATE DYNAMICS,2022,1:16. |
APA | Zhang, Guangli,Wang, Xin,Xie, Qiang,Chen, Jiepeng,&Chen, Sheng.(2022).Strengthening impacts of spring sea surface temperature in the north tropical Atlantic on Indian Ocean dipole after the mid-1980s.CLIMATE DYNAMICS,1,16. |
MLA | Zhang, Guangli,et al."Strengthening impacts of spring sea surface temperature in the north tropical Atlantic on Indian Ocean dipole after the mid-1980s".CLIMATE DYNAMICS 1(2022):16. |
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