The role of Equatorial Undercurrent in sustaining the Eastern Indian Ocean upwelling
Abstract By combining volume transport and salinity analysis from 1958 to 2014, this paper investigates how the transient Equatorial Undercurrent (EUC) sustains the summer‐fall equatorial eastern Indian Ocean (EIO) upwelling. On seasonal time scales, the EIO upwelling is mainly supplied by the salty...
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| Format: | Article |
| Language: | English |
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Wiley
2016-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL069433 |
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| author | Gengxin Chen Weiqing Han Yeqiang Shu Yuanlong Li Dongxiao Wang Qiang Xie |
| author_facet | Gengxin Chen Weiqing Han Yeqiang Shu Yuanlong Li Dongxiao Wang Qiang Xie |
| author_sort | Gengxin Chen |
| collection | DOAJ |
| description | Abstract By combining volume transport and salinity analysis from 1958 to 2014, this paper investigates how the transient Equatorial Undercurrent (EUC) sustains the summer‐fall equatorial eastern Indian Ocean (EIO) upwelling. On seasonal time scales, the EIO upwelling is mainly supplied by the salty water from the western basin through a buffering process: The winter‐spring EUC carries the salty water from the western basin eastward, induces downwelling in the EIO, and pushes portion of the salty water below the central thermocline, which subsequently upwells to the central thermocline during summer‐fall and sustains the EIO upwelling. On interannual time scales, enhanced upwelling occurs during positive Indian Ocean Dipole (+IOD) years. The strong summer‐fall EUC associated with the +IOD supplies water for the intensified upwelling. This research provides new knowledge for basin‐scale mass and property exchanges associated with the EIO upwelling, contributing to our understanding of three‐dimensional ocean circulation and climate variability. |
| format | Article |
| id | doaj-art-5a58df1a29934da18214016efdec9c86 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-5a58df1a29934da18214016efdec9c862025-08-20T03:10:24ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143126444645110.1002/2016GL069433The role of Equatorial Undercurrent in sustaining the Eastern Indian Ocean upwellingGengxin Chen0Weiqing Han1Yeqiang Shu2Yuanlong Li3Dongxiao Wang4Qiang Xie5State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou ChinaDepartment of Atmospheric and Oceanic Sciences University of Colorado Boulder Colorado USAState Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou ChinaDepartment of Atmospheric and Oceanic Sciences University of Colorado Boulder Colorado USAState Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou ChinaState Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou ChinaAbstract By combining volume transport and salinity analysis from 1958 to 2014, this paper investigates how the transient Equatorial Undercurrent (EUC) sustains the summer‐fall equatorial eastern Indian Ocean (EIO) upwelling. On seasonal time scales, the EIO upwelling is mainly supplied by the salty water from the western basin through a buffering process: The winter‐spring EUC carries the salty water from the western basin eastward, induces downwelling in the EIO, and pushes portion of the salty water below the central thermocline, which subsequently upwells to the central thermocline during summer‐fall and sustains the EIO upwelling. On interannual time scales, enhanced upwelling occurs during positive Indian Ocean Dipole (+IOD) years. The strong summer‐fall EUC associated with the +IOD supplies water for the intensified upwelling. This research provides new knowledge for basin‐scale mass and property exchanges associated with the EIO upwelling, contributing to our understanding of three‐dimensional ocean circulation and climate variability.https://doi.org/10.1002/2016GL069433Eastern Indian OceanEquatorial Undercurrentupwelling |
| spellingShingle | Gengxin Chen Weiqing Han Yeqiang Shu Yuanlong Li Dongxiao Wang Qiang Xie The role of Equatorial Undercurrent in sustaining the Eastern Indian Ocean upwelling Geophysical Research Letters Eastern Indian Ocean Equatorial Undercurrent upwelling |
| title | The role of Equatorial Undercurrent in sustaining the Eastern Indian Ocean upwelling |
| title_full | The role of Equatorial Undercurrent in sustaining the Eastern Indian Ocean upwelling |
| title_fullStr | The role of Equatorial Undercurrent in sustaining the Eastern Indian Ocean upwelling |
| title_full_unstemmed | The role of Equatorial Undercurrent in sustaining the Eastern Indian Ocean upwelling |
| title_short | The role of Equatorial Undercurrent in sustaining the Eastern Indian Ocean upwelling |
| title_sort | role of equatorial undercurrent in sustaining the eastern indian ocean upwelling |
| topic | Eastern Indian Ocean Equatorial Undercurrent upwelling |
| url | https://doi.org/10.1002/2016GL069433 |
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