印度洋赤道Kelvin波对安达曼海东部近岸温跃层深度的影响  

The Impacts of Equatorial Indian Ocean Kelvin Wave on the Depth of Thermocline in Eastern Coastal Andaman Sea

作　　者：苏博[1,2] 刘琳[1,2] 李奎平[1,2] 高立宝[1,2] 于卫东[1,2] 

机构地区：[1]国家海洋局海洋与气候研究中心,山东青岛266061 [2]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2013年第3期343-350,共8页Advances in Marine Science

基　　金：国家海洋局国际科技合作项目--印度洋季风爆发的海气相互作用与生态响应合作观测研究(2010DFB20420);国家重点基础研究发展计划项目--印度洋季风爆发和推进过程中的关键海气相互作用(2010CB950303)

摘　　要：安达曼海东部近岸温度跃层深度变化呈现半年周期特征,与局地风场年周期变化不同。分析结果表明,安达曼海内部环境场受到来自赤道印度洋的海洋波动信号的影响,赤道印度洋风场导致的赤道Kelvin波沿赤道印度洋东传,并在印度洋东边界反射北传,从而将热带印度洋信号传输至安达曼海,作用于近岸海水,导致安达曼海近岸海水温跃层变化呈现半年周期的双峰状结构。年际时间尺度上,厄尔尼诺和印度洋偶极子事件是影响安达曼海东岸温跃层年际变化的两个重要因素,这对理解年际尺度的气候异常事件对近岸生态系统的影响有着重要意义。The change of thermocline in eastern coastal Andaman Sea is semiannual, not coordinated with the annual cycle variation of the local wind. Because the Andaman Sea is open to equatorial Indian Ocean, the remote signal from the equator will inevitably transmit into the Andaman Sea. Lots of studies showed that the variability of the equatorial wind excited Kelvin wave propagating into the North Indian Ocean. In this paper, the Kelvin wave provides a pathway to the transfer of the interior ocean signal from the equato rial Indian Ocean to the eastern coastal Andaman Sea, and impacts on the ocean vertical structure in east- ern coastal Andaman Sea, makes the variability of thermocline in the research area show semiannual cycle. Also, the depth of thermocline shows great interannual variability because of ENSO and IOD events. The variability of the thermocline in eastern coastal Andaman Sea has significant correlation with equator zonal wind, this is great significant to understand the effect of abnormal climate events on the coastal ecosystem in interannual time scale.

关 键 词：安达曼海 KELVIN波 温跃层深度 海面高度 

分 类 号：P731.11[天文地球—海洋科学]