| 摘要: |
| 台风是影响东海最严重的自然灾害之一。本文在现场观测基础上，结合遥感与模型数据，研究了连续两个台风过境对东海北部水环境及初级生产力的影响。研究结果表明：连续两个台风过境情况下，虽然前面台风有助于后续台风对海洋上层进行垂直混合作用，但它对后续台风过后海洋表层温度（SST）的降低以及初级生产力的增加却起到了削弱作用；除了加强垂向混合过程，台风也可以改变海洋上层的平流输运过程，受此影响，部分海区上层温度、盐度以及叶绿素在台风后重新分布；台风对海区次表层叶绿素浓度的改变程度明显高于表层，某些站位次表层叶绿素最大值（SCM）在台风刚过后被破坏，一段时间后SCM又重新出现，而且层内叶绿素浓度远高于台风前水平。 |
| 关键词: 连续台风过境 流场 温度 盐度 初级生产力 东海 |
| DOI：10.11693/hyhz20160400074 |
| 分类号: |
| 基金项目:科技部全球变化重大科学研究计划项目，2010CB951203号；国家重点基础研究发展规划项目，G1999043705号；上海市科委知识创新项目，10JC1404400号；国家自然科学基金项目，41106098号。 |
附件 |
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| EFFECTS OF SUCCESSIVE TWO TYPHOONS ON THE WATER ENVIRONMENT AND PRIMARY PRODUCTIVITY IN THE NORTHERN EAST CHINA SEA |
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WANG Teng, GAO Lei, LI Dao-Ji
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State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
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| Abstract: |
| Typhoon is one of the several most serious catastrophic weather events that affect East China Sea (ECS). We study the effects of successive two typhoons (Maemi and Choi-Wan) passing over the northern South China Sea in 2003 in 8-day interval based on field observation, remote sensing, and numerical modeling on water environment and primary productivity. Results show that the second typhoon made the water column even more vertical-mixed, and the decrease of SST and the increase of primary productivity following the second typhoon were somewhat relieved owing to the early influence of the first typhoon. In addition, the two typhoons altered the advection structure in the upper ocean, and the distributions of temperature, salinity, and chlorophyll were significantly reshaped. The chlorophyll content in the subsurface layers changed more greatly than in the surface layer under the two-typhoon effect. At some stations, the subsurface chlorophyll maximum (SCM) layers were destroyed after typhoon, and several days later, they resumed and reached much greater chlorophyll concentrations than previous ones. |
| Key words: successive typhoon passage current temperature salinity primary productivity East China Sea |
