舟山近海海域夏季上升流时空特征及其与风场的关系

发布时间：2018-05-02 13:46

  本文选题：舟山近海海域 + 海表温度　； 参考：《上海海洋大学学报》2016年01期

【摘要】：利用2002-2013年期间的卫星遥感海表温度(SST)数据分析了舟山海域夏季上升流的时空特征,并结合同时期的海面风场数据探讨了风对该海域夏季上升流的影响。对多年夏季月平均的SST进行经验正交函数(EOF)分解结果表明,7月份前两个模态方差贡献率分别为71.66%、16.55%,8月份前两个模态方差贡献率分别为87.03%和7.30%,并均通过了显著性检验,舟山近海海域的上升流存在较为明显的年际变化。相关分析显示,经向风速和SST异常存在显著的负相关关系,即夏季盛行的西南风有利于上升流的发展。并且,艾克曼(Ekman)体积输运计算结果表明,舟山海域7、8月份风生上升流的量级分别为3.0×10~(-5)m/s和1.5×10~(-5)m/s,7月上升流显著强于8月,这与8月份观测到的海表显著低温异常相关。
[Abstract]:Based on the satellite remote sensing sea surface temperature (SST) data from 2002 to 2013, the spatial and temporal characteristics of summer upwelling in Zhoushan sea area are analyzed, and the influence of the monsoon on the summer upwelling in Zhoushan sea area is discussed with the sea surface wind field data of the same period. The empirical orthogonal function (EOF) decomposition of the monthly average SST in summer shows that the contribution rates of the first two modes in July are 71.66 and 16.555.The contribution rates of the first two modes in August are 87.03% and 7.30%, respectively, and they have passed the significance test. There is obvious interannual variation of the upwelling in the coastal waters of Zhoushan. Correlation analysis shows that there is a significant negative correlation between meridional wind speed and SST anomaly, that is, the prevailing southwest wind in summer is conducive to the development of upwelling. Moreover, the calculation results of Ekman volume transport in Zhoushan sea area show that the order of wind upwelling in July and August is 3.0 脳 10~(-5)m/s and 1.5 脳 10 ~ (-5) m / s, respectively, and the upwelling in July is stronger than that in August, which is related to the apparent low temperature anomaly observed in August.
【作者单位】： 上海海洋大学海洋科学学院;上海海洋大学大洋渔业资源可持续利用省部共建教育部重点实验室;
【基金】：上海市科委重点支撑项目(13230502000) 国家海洋局溢油鉴别与损害评估技术重点实验室资助项目(D-8005-14-8003) 上海海洋大学博士科研启动基金项目(A2-0302-14-300071)
【分类号】：P732.6
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本文编号：1834198