基于Argo的热带东印度洋上层水团季节分布  

Seasonal variations of upper-layer watermasses in eastern tropical Indian Ocean explored by Argo floats

作　　者：宣莉莉[1] 邱云[2] 许金电[2] 张晓爽[1] 邵彩霞[1] 

机构地区：[1]国家海洋信息中心海洋环境信息保障技术重点实验室,天津300171 [2]国家海洋局第三海洋研究所海洋动力学实验室,福建厦门361005

出　　处：《解放军理工大学学报（自然科学版）》2015年第2期188-194,共7页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(41276034;41030854;41176003;41106005;41376015);国家海洋局海洋公益性行业科研专项经费资助项目(20130531-8)

摘　　要：为研究热带东印度洋上层海洋孟加拉湾水(BBW)及阿拉伯海水(ASW)的季节分布,利用2003-2012年的地转海洋学实时观测阵(Argo)资料,依据温盐标准分析其分布特征。结果显示,BBW在11月至次年3月主要分布在阿拉伯海东南部海域,6-10月出现在苏门答腊岛外海及赤道海域,并持续至次年2月。ASW在5,6月及10月至次年1月沿赤道向东延伸最远,可至90°E以东海域,在多数月份(6月至次年4月)还出现在湾内。分析表明,BBW有3个出湾通道:11月至次年3月,东印度沿岸流及东北季风漂流是BBW从湾内进入阿拉伯海东南部海域的2个主要流路,6-10月,BBW通过湾口东侧的连续南向流输送至苏门答腊岛外海;ASW入侵湾内有2个路径:11月至次年4月,由赤道至湾口的连续北向流经湾口东侧进入湾内,6-9月ASW由西南季风漂流输运至湾内。To study the seasonal variation of the Bay of Bengal water（BBW） and Arabian Sea water（ASW） in the upper Eastern Tropical Indian Ocean（ETIO）, nearly 10 years（2003--2012） Array for Real-time Ge- ostrophic Oceanography （Argo） float data and the standard of watermass analysis were used to analyse their distribution characteristics. The result shows that BBW mainly distributes in the southeast of Arabian Sea from November to the proceeding March, while it appears at the equator and off Sumatra during June and October, which persists until the proceeding February. ASW extends eastward along the equator, as far as 90°E in the May-June and October-the proceeding January. Besides, ASW also appears in the bay most of the time （June-the proceeding April）. Further analysis shows that BBW has three pathways out of the bay. During November and the proceeding March, East India Coastal Current and the northeast mon- soon current are two main pathways for transporting BBW from the interior bay to the southeast of Arabi- an Sea. During June and October, BBW is carried southward into the equator and off the Sumatra via the eastern bay mouth by the continuously southward current. There are two pathways for ASW to invade intothe bay.During november and the proceeding april, ASW is carried into the bay through the eastern bay mouth by the northward flow located between the bay and the equator. It is transported into the bay by the summer monsoon current during June and September.

关 键 词：地转海洋学实时观测阵 热带东印度洋 上层水团 季节分布 

分 类 号：P731[天文地球—海洋科学]