| 赤道中印度洋上层环流结构与季节变化特征分析 |
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| 引用本文： | 王毅,崔凤娟.赤道中印度洋上层环流结构与季节变化特征分析[J].海洋与湖沼,2015,46(2):241-247. |
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| 作者姓名： | 王毅 崔凤娟 |
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| 作者单位： | 1. 中国海洋大学海洋环境学院 青岛266100;美国国家大气暨海洋总署太平洋海洋环境实验室 西雅图98115
2. 中国海洋大学海洋环境学院 青岛266100 |
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| 基金项目： | 国家自然科学基金项目,41276011号;教育部科学技术研究项目,113041A号。 |
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| 摘 要： | 本文通过分析RAMA印度洋观测浮标系统锚系ADCP实测资料,对赤道中印度洋上层海流季节变化进行了研究。研究结果表明,0°,80.5°E纬向流垂向剖面呈现上150m层一致的东向流,而经向流在100m以浅呈现表层向北次表层向南的翻转流结构。赤道中印度洋上层纬向流季节信号被半年周期的东向射流Wyrtki Jets(WJs)所控制。WJs发生于季风方向转换的季节,4—5月份较弱,10—11月份较强。赤道中印度洋上层经向流年周期信号显著。北半球夏季与冬季分别出现风应力旋度驱动的Sverdrup南向流与北向流。本文结论为赤道中印度洋上层环流季节变化特征的研究提供了观测角度的支持。
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| 关 键 词： | 赤道中印度洋 上层环流 Wyrtki Jets |
| 收稿时间： | 5/2/2014 12:00:00 AM |
| 修稿时间： | 2014/5/19 0:00:00 |
THE STRUCTURE AND SEASONAL VARIATION OF UPPER-LAYER CURRENTS AT CENTRAL EQUATORIAL INDIAN OCEAN |
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| WANG Yi and CUI Feng-Juan.THE STRUCTURE AND SEASONAL VARIATION OF UPPER-LAYER CURRENTS AT CENTRAL EQUATORIAL INDIAN OCEAN[J].Oceanologia Et Limnologia Sinica,2015,46(2):241-247. |
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| Authors: | WANG Yi and CUI Feng-Juan |
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| Institution: | College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle 98115, USA and College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China |
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| Abstract: | The ADCP current data at 0°, 80.5°E from the Research Moored Array for African-Asian-Australian Monsoon Analysis and Prediction (RAMA) program are analyzed. The annual mean state and seasonal cycle of currents at the central equatorial Indian Ocean are presented with strong observational evidence. The annual mean zonal currents in the upper 150m are eastward while the meridional currents northward at surface and southward at subsurface constituting a shallow roll at 0°, 80.5°E. The seasonal cycle of the zonal currents are dominated by the semi-annual eastward currents known as Wyrtki Jets (WJs). WJs occur in April to May and October to July. The boreal fall jets are stronger than the spring ones. Annual signal of the meridional currents is significant in the upper ocean. Southward Sverdrup currents are driven by negative curl of the sea surface wind stress in boreal summer and conversely northward Sverdrup currents occurs in boreal winter. |
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| Keywords: | Central Equatorial Indian Ocean upper layer currents Wyrtki Jets |
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