中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 深海科学与工程研究所
  3. 中国科学院深海科学与工程研究所
  4. 深海科学研究部
  5. 海洋环流观测与数值模拟研究室
Dynamics of the Summer Counter-Wind Current Along South Sri Lanka Coast 1: The Dominant Role of Intra-Seasonal Variability

文献类型：期刊论文

作者Xin, Hongyu4,5,6; Wang, Weiqiang3,5; Xie, Qiang6; Han, Weiqing2; Huang, Ke5; Xu, Kang3,5; Arulananthan, K.1; Tennakoon, Kamal1
刊名JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
出版日期2024-09-01
卷号129期号:9页码:19
关键词south Sri Lanka coastal current counter-wind current boreal summer intra-seasonal oscillation Rossby wave local wind
ISSN号2169-9275
DOI10.1029/2023JC020618
英文摘要The spatiotemporal characteristics of the south Sri Lanka coastal current (SSLCC) during summer are examined in this study. Climatologically, the SSLCC flows eastward as a part of the southwest monsoon current during summer. However, westward SSLCC occurred lasting more than 20 days in the summer of 2013, 2016, 2017, and 2018 based on reanalysis data, implying significant interannual variability of the SSLCC. The analysis on the summer extreme westward SSLCC indicates that the intra-seasonal wind associated with atmospheric boreal summer intra-seasonal oscillation (BSISO) is the main factor leading to the westward SSLCC. Firstly, the northward propagation of the BSISO induces the westerly wind anomaly and positive wind stress curl anomaly along the south and east coast of Sri Lanka, which induces the westward SSLCC. Secondly, driven by equatorial Indian Ocean intra-seasonal wind, the low sea level anomaly associated with upwelling Rossby wave reflected from the west coast of Sumatra Island propagates westward. This propagation significantly influences the cyclonic circulation off the south coast of Sri Lanka, thus facilitating the occurrence of the westward SSLCC. Climatologically, the south Sri Lanka coastal current (SSLCC) transports high-salinity water from the Arabian Sea to the Bay of Bengal as it flows eastward during summer. However, extreme westward SSLCC occurred in the summer of 2013, 2016, 2017, and 2018, lasting roughly 20 days and affecting the salinity balance of the Northern Indian Ocean. Our study aims at investigating the characteristics of the SSLCC and explores the mechanism of the summer westward SSLCC. The findings suggest that the westward SSLCC is primarily regulated by the intra-seasonal component (30-105 days). The regulation of this intra-seasonal signal involves a combination of factors, including a positive wind stress curl anomaly along the south and east coast of Sri Lanka and the presence of upwelling Rossby waves along the 5 degrees N section. The south Sri Lanka coastal current (SSLCC) exhibits significant intra-seasonal, semi-annual, and annual components Intra-seasonal signal associated with boreal summer intra-seasonal oscillation dominates the emergence of the summer westward SSLCC The synergistic effect of the cyclonic wind stress curl anomaly on the southern Sri Lanka coast and upwelling Rossby waves reflected from Sumatra Island facilitates the summer westward SSLCC
WOS关键词EQUATORIAL INDIAN-OCEAN ; SEA-SURFACE HEIGHT ; MONSOON CURRENT ; INTRASEASONAL VARIABILITY ; WESTERN BAY ; ARABIAN SEA ; BENGAL ; CIRCULATION ; OSCILLATION ; PACIFIC
资助项目National Key R&D Program of China ; National Natural Science Foundation of China[42076020] ; National Natural Science Foundation of China[42275024] ; National Natural Science Foundation of China[42176021] ; Guangdong Basic and Applied Basic Research Foundation[2023B1515020009] ; Guangdong Basic and Applied Basic Research Foundation[2022B1212050003] ; Science and Technology Planning Project of Guangzhou[2024A04J6275] ; South China Sea Institute of Oceanology of the Chinese Academy of Sciences[SCSIO2023QY01] ; South China Sea Institute of Oceanology of the Chinese Academy of Sciences[SCSIO2023HC07] ; South China Sea Institute of Oceanology of the Chinese Academy of Sciences[SCSIO202201] ; NSFC Shiptime Sharing Project[42149910] ; NSFC Shiptime Sharing Project[NORC2022-10 + NORC2022-303] ; NSFC Shiptime Sharing Project[42249910] ; NSFC Shiptime Sharing Project[NORC2023-10 + NORC2023-303] ; NSFC Shiptime Sharing Project[059GJHZ2023104MI] ; Chinese Academy of Sciences ; [2022YFE0203500]
WOS研究方向Oceanography
语种英语
WOS记录号WOS:001310047900001
出版者AMER GEOPHYSICAL UNION
资助机构National Key R&D Program of China ; National Natural Science Foundation of China ; Guangdong Basic and Applied Basic Research Foundation ; Science and Technology Planning Project of Guangzhou ; South China Sea Institute of Oceanology of the Chinese Academy of Sciences ; NSFC Shiptime Sharing Project ; Chinese Academy of Sciences
源URL[http://ir.idsse.ac.cn/handle/183446/11377]  
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, Weiqiang
作者单位1.Natl Aquat Resources Res & Dev Agcy Crow Isl, Colombo, Sri Lanka
2.Univ Colorado Boulder, Dept Atmospher & Ocean Sci, Boulder, CO USA
3.Chinese Acad Sci, Guangdong Key Lab Ocean Remote Sensing, South China Sea Inst Oceanol, Guangzhou, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Peoples R China
6.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China
推荐引用方式
GB/T 7714		 Xin, Hongyu,Wang, Weiqiang,Xie, Qiang,et al. Dynamics of the Summer Counter-Wind Current Along South Sri Lanka Coast 1: The Dominant Role of Intra-Seasonal Variability[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2024,129(9):19.
APA Xin, Hongyu.,Wang, Weiqiang.,Xie, Qiang.,Han, Weiqing.,Huang, Ke.,...&Tennakoon, Kamal.(2024).Dynamics of the Summer Counter-Wind Current Along South Sri Lanka Coast 1: The Dominant Role of Intra-Seasonal Variability.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,129(9),19.
MLA Xin, Hongyu,et al."Dynamics of the Summer Counter-Wind Current Along South Sri Lanka Coast 1: The Dominant Role of Intra-Seasonal Variability".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 129.9(2024):19.

入库方式： OAI收割

来源：深海科学与工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。