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Attributing interdecadal variations of southern tropical Indian Ocean dipole mode to rhythms of Bjerknes feedback intensity

文献类型：期刊论文

作者Zhang, Guangli3,6; Wang, Xin4,5; Xie, Qiang3; Huang, Bohua1,2; Chen, Jiepeng5; Fan, Hanjie5; Wang, Dongxiao6
刊名CLIMATE DYNAMICS
出版日期2024-02-02
页码17
ISSN号0930-7575
关键词Southern tropical Indian Ocean dipole mode Interdecadal changes Bjerknes feedback Climatological mean state
DOI10.1007/s00382-024-07102-8
英文摘要The changes in the intensity of the southern tropical Indian Ocean dipole mode (STIOD) are investigated using observations and the Community Earth System Model Large Ensemble (CESM-LE) project in this study. The positive STIOD is characterized as cold SST anomalies over the tropical southeastern Indian Ocean (SEIO) and warm SST anomalies over the southcentral Indian Ocean (SCIO), which peak in boreal summer. It is suggested that the intensity of interannual variability in the STIOD experienced prominent interdecadal changes from 1970 to the present. The STIOD was relatively weak before the late 1980s, while it is enhanced significantly during the late 1980s to early-2000s and displayed some decrease in the intensity after the early-2000s. As an important generation mechanism, changes in the strengths of the Bjerknes feedback between the SCIO and SEIO mainly contribute to the variations of the STIOD intensity. The changes in Bjerknes feedback are associated with the variations in climatological mean states over the tropical Indian Ocean. The warmer climatological SST strengthens the efficiency of the SEIO SST in driving wind. On the other hand, the combined effects of the Indonesian Throughflow and surface climatological zonal winds alter the mean thermocline depth over the SEIO, contributing to the variations in the relationship between the thermocline depth and SST anomalies in situ. Two sets of historical and RCP8.5 simulations from CESM1-LE with 35 ensemble members are analyzed to confirm the roles of mean state changes on the intensity of interannual variability of STIOD.
WOS关键词EL-NINO ; INTERANNUAL VARIABILITY ; CLIMATE-CHANGE ; PACIFIC ; RAINFALL ; MECHANISMS ; TEMPERATURE ; DYNAMICS ; PATTERNS ; MONSOON
资助项目State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences Project
WOS研究方向Meteorology & Atmospheric Sciences
语种英语
出版者SPRINGER
WOS记录号WOS:001153910800001
资助机构State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences Project
源URL[http://ir.idsse.ac.cn/handle/183446/10839]  
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; Wang, Dongxiao
作者单位1.George Mason Univ, Ctr Ocean Land Atmosphere Studies, Fairfax, VA USA
2.George Mason Univ, Dept Atmospher Ocean & Earth Sci, Fairfax, VA USA
3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China
4.Chinese Acad Sci, South China Sea Inst Oceanol, Global Ocean & Climate Res Ctr, Guangzhou, Peoples R China
5.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China
6.Sun Yat Sen Univ, Sch Marine Sci, Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Guangli,Wang, Xin,Xie, Qiang,et al. Attributing interdecadal variations of southern tropical Indian Ocean dipole mode to rhythms of Bjerknes feedback intensity[J]. CLIMATE DYNAMICS,2024:17.
APA Zhang, Guangli.,Wang, Xin.,Xie, Qiang.,Huang, Bohua.,Chen, Jiepeng.,...&Wang, Dongxiao.(2024).Attributing interdecadal variations of southern tropical Indian Ocean dipole mode to rhythms of Bjerknes feedback intensity.CLIMATE DYNAMICS,17.
MLA Zhang, Guangli,et al."Attributing interdecadal variations of southern tropical Indian Ocean dipole mode to rhythms of Bjerknes feedback intensity".CLIMATE DYNAMICS (2024):17.

入库方式： OAI收割

来源：深海科学与工程研究所

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