热带海洋学报 ›› 2015, Vol. 34 ›› Issue (6): 26-34.doi: 10.11978/2015012

所属专题: 海上丝绸之路专题

• 海洋水文学 • 上一篇    下一篇

孟加拉湾与赤道东印度洋水交换的季节变化特征*

宣莉莉1, 邱云2, 许金电2, 李自强3   

  1. 1. 国家海洋信息中心, 国家海洋局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, 福建 厦门 361005;
    3. 中国人民解放军61741部队, 北京 100000
  • 收稿日期:2015-01-25 修回日期:2015-06-10 出版日期:2015-11-10 发布日期:2015-11-24
  • 作者简介:宣莉莉(1989~), 女, 浙江省浦江市人, 硕士, 研究实习员, 主要从事热带边缘海海洋环流动力学研究。E-mail: julie2010@yeah.net
  • 基金资助:
    国家自然科学基金项目(41276034、41030854、41176003、41106005、41376015); 国家海洋局海洋公益性行业科研专项经费项目(20130531-8)

Seasonal variation of the water exchange between the Bay of Bengal and the equatorial eastern Indian Ocean

XUAN Li-li1, QIU Yun2, XU Jin-dian2, Li Zi-qiang3   

  1. 1. Key Laboratory of Marine Environmental Information Technology, National Marine Data and Information Service, Tianjin 300171, China;
    2. Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China;
    3. The Peoples Liberation Army of NO. 61741, Beijing 100000, China
  • Received:2015-01-25 Revised:2015-06-10 Online:2015-11-10 Published:2015-11-24

摘要: 文章利用海洋再分析产品及卫星遥感资料等分析了赤道东印度洋与孟加拉湾经向盐交换的季节变化特征, 估算了孟加拉湾湾口6°N断面的年均淡水输运量。盐通量计算结果表明孟加拉湾与赤道东印度洋的盐交换过程主要由海流控制, 湾口东西两侧过程基本相反。西南季风期(东北季风期)西侧为向北(南)的盐通量, 东侧为向南(北)的盐通量。湾口经向淡水输运量的分析表明, 断面上层在4~10月湾内向湾外输运淡水; 在11月~次年3月则相反。年均经向淡水输运量的分析表明, 在整个深度层次上由孟加拉湾向赤道东印度洋输运淡水, 断面年均淡水输运量为1.0×105m3·s-1

关键词: 赤道东印度洋, 孟加拉湾, 水交换, 海洋再分析数据集

Abstract: Based on the simple ocean data assimilation (SODA) reanalysis and satellite observations, we analyzed the seasonal variation of the meridional salt exchange between the Bay of Bengal (BOB) and the equatorial eastern Indian Ocean (EEIO). We estimated the annual-mean freshwater transport along the 6°N section at the mouth of the BOB. Results showed that the salt exchange between BOB and EEIO is dominated by the currents, and its direction is almost opposite between the east and west sides at the bay mouth. During the southwest monsoon (northeast monsoon), the salt flux is northward (southward) in the west while it is southward (northward) in the east of the bay mouth. Furthermore, the freshwater flows out of (into) the bay during April to October (November to the following March). The freshwater transport from the BOB to the EEIO happens in the whole depth. The annual-mean freshwater transport is 1.0×105m3·s-1.

Key words: Equatorial eastern Indian Ocean, Bay of Bengal, water exchange, simple ocean data assimilation

中图分类号: 

  • P731.26