东中国海黑潮海洋锋的季节变化特征及其成因

发布时间：2018-01-19 20:24

本文关键词： 海洋锋季节变化东海黑潮　出处：《气象科学》2016年02期 　论文类型：期刊论文

【摘要】：利用高分辨率海洋和大气再分析资料研究了东中国海黑潮海洋锋的季节变化特征及其成因。研究表明,东海黑潮海洋锋存在明显的季节变化,从冬季到次年春季逐渐增强,并在春季达到最强,初夏以后强度逐渐减弱,9—10月达到全年最弱。通过诊断混合层热流量方程发现,东海黑潮区一年四季均表现为暖的温度平流,有利于海洋锋的形成和维持,该暖平流也存在季节变化并在春季达到最大,对海洋锋在春季达到最强起了重要作用。海气界面净热通量在秋冬季对海洋锋的形成有促进作用,有利于海洋锋增强,而在春夏季则起抑制作用,促进海洋锋消亡。温度垂直输送全年对海洋锋起一定程度的抑制作用。总之,在海温水平平流和海表净热通量的共同作用下导致海洋锋春季达到最强,而夏秋季海表净热通量和温度垂直输送作用的共同作用致使海洋锋减弱并最后消失。因此,海洋的动力和热力共同作用导致了东海黑潮海洋锋的季节变化,其中海温水平平流和海表净热通量对海洋锋的季节变化起主要作用,而温度垂直输送项对海洋锋的发展起抑制作用,但影响相对较小。
[Abstract]:The seasonal variation characteristics of the Kuroshio oceanic front in the East China Sea and its causes are studied using high-resolution oceanic and atmospheric reanalysis data. The results show that the Kuroshio oceanic front in the East China Sea has obvious seasonal variation. From winter to the following spring, the intensity increased gradually, and reached its strongest in spring, and weakened gradually after early summer, and reached the weakest in the whole year from September to October. It was found by diagnosing the heat flux equation of mixed layer. The warm temperature advection in the Kuroshio region of the East China Sea is favorable to the formation and maintenance of the oceanic front. The warm advection also has seasonal variation and reaches its maximum in spring. Net heat flux at sea and air interface can promote the formation of ocean front in autumn and winter, which is beneficial to the enhancement of ocean front, but it can be inhibited in spring and summer. The vertical transport of temperature can restrain the ocean front to some extent. In a word, the combination of horizontal advection of sea temperature and net heat flux of sea surface leads to the strongest spring of ocean front. In summer and autumn, the sea surface net heat flux and vertical transport of temperature make the ocean front weaken and finally disappear. Therefore, the dynamic and thermal interaction of the sea leads to the seasonal variation of the Kuroshio ocean front in the East China Sea. The horizontal advection of sea temperature and net heat flux of sea surface play a major role in the seasonal variation of ocean front, while the vertical transport of temperature inhibits the development of ocean front, but the influence is relatively small.
【作者单位】：南京信息工程大学气象灾害预报预警与评估协同创新中心/气象灾害教育部重点实验室;南京信息工程大学大气科学学院;
【基金】：国家重大科学研究计划项目(2012CB955600) 国家自然科学基金资助项目(41275094) 江苏高校优势学科建设工程项目(PAPD) 江苏省高校“青蓝工程”
【分类号】：P731
【正文快照】： 引言东海又称东中国海,位于中国大陆以东,是太平洋西部的陆缘海之一。东海蕴藏着丰富的石油资源,其优良的气候条件和温盐环境提供了鱼虾繁殖的良好场所,是我国的海产宝库,也是军事战略和经济要地。随着我国海洋经济迅速发展,对海洋气象预报提出更高要求,因此,研究东海的天气现

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