| 冬季婆罗洲岛西北沿岸上升流的时空特征及机理研究 |
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| 作者姓名： | YAN Yunwei LING Zheng CHEN Changlin |
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| 作者单位： | College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;State Key Laboratory of Satellite Ocean Environment dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China,State Key Laboratory of Satellite Ocean Environment dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China,State Key Laboratory of Satellite Ocean Environment dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| 基金项目： | The National Natural Science Foundation of China under contract No. 91128212; the National Basic Research Program of China under contract No. 2013CB430301; the National Science Fund of China for distinguished Young Scholars (NSFdYS) under contract No. 41125019; the National Natural Science Foundation of China under contract No. 41306024; the Project of Global Change and Air-Sea Interaction under contract No. GASI-03-01-03-03; the Basic Research Program of Second Institute of Oceanography, State Oceanic Administration of China under contract No. JT1301. |
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| 摘 要： | Winter coastal upwelling off northwest Borneo in the South China Sea(SCS) is investigated by using satellite data, climatological temperature and salinity fields and reanalysis data. The upwelling forms in December, matures in January, starts to decay in February and almost disappears in March. Both Ekman transport induced by the alongshore winter monsoon and Ekman pumping due to orographic wind stress curl are favorable for the upwelling. Transport estimates demonstrate that the month-to-month variability of Ekman transport and Ekman pumping are both consistent with that of winter coastal upwelling, but Ekman transport is two times larger than Ekman pumping in January and February. Under the influence of El Ni?o-Southern Oscillation(ENSO), the upwelling shows remarkable interannual variability: during winter of El Ni?o(La Ni?a) years, an anticyclonic(a cyclonic) wind anomaly is established in the SCS, which behaves a northeasterly(southwesterly) anomaly and a positive(negative) wind stress curl anomaly off the northwest Borneo coast, enhancing(reducing) the upwelling and causing anomalous surface cooling(warming) and higher(lower) chlorophyll concentration. The sea surface temperature anomaly(SSTA) associated with ENSO off the northwest Borneo coast has an opposite phase to that off southeast Vietnam, resulting in a SSTA seesaw pattern in the southern SCS in winter.
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| 关 键 词： | coastal upwelling northwest Borneo South China Sea Ekman transport Ekman pumping interannual variability |
| 收稿时间： | 3/3/2014 12:00:00 AM |
| 修稿时间： | 2014/4/18 0:00:00 |
Winter coastal upwelling off northwest Borneo in the South China Sea |
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| YAN Yunwei,LING Zheng,CHEN Changlin.Winter coastal upwelling off northwest Borneo in the South China Sea[J].Acta Oceanologica Sinica,2015,34(1):3-10. |
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| Authors: | YAN Yunwei LING Zheng and CHEN Changlin |
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| Institution: | 1.College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;State Key Laboratory of Satellite Ocean Environment dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China2.State Key Laboratory of Satellite Ocean Environment dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | Winter coastal upwelling off northwest Borneo in the South China Sea (SCS) is investigated by using satellite data, climatological temperature and salinity fields and reanalysis data. The upwelling forms in december, matures in January, starts to decay in February and almost disappears in March. Both Ekman transport induced by the alongshore winter monsoon and Ekman pumping due to orographic wind stress curl are favorable for the upwelling. Transport estimates demonstrate that the month-to-month variability of Ekman transport and Ekman pumping are both consistent with that of winter coastal upwelling, but Ekman transport is two times larger than Ekman pumping in January and February. Under the influence of El Niño-Southern Oscillation (ENSO), the upwelling shows remarkable interannual variability: during winter of El Niño (La Niña) years, an anticyclonic (a cyclonic) wind anomaly is established in the SCS, which behaves a northeasterly (southwesterly) anomaly and a positive (negative) wind stress curl anomaly off the northwest Borneo coast, enhancing (reducing) the upwelling and causing anomalous surface cooling (warming) and higher (lower) chlorophyll concentration. The sea surface temperature anomaly (SSTA) associated with ENSO off the northwest Borneo coast has an opposite phase to that off southeast Vietnam, resulting in a SSTA seesaw pattern in the southern SCS in winter. |
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| Keywords: | coastal upwelling northwest Borneo South China Sea Ekman transport Ekman pumping interannual variability |
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