钓鱼岛东北冷涡特征及其生长消亡规律

发布时间：2018-06-16 17:18

本文选题：东海南部 + 钓鱼岛　；参考：《海洋与湖沼》2017年03期

【摘要】：利用1987到2011年期间7个航次的调查数据揭示了夏季钓鱼岛东北海域存在冷涡的事实,首次将其命名为钓鱼岛东北冷涡,并初步分析了钓鱼岛东北冷涡特征及其生长消亡规律。结果表明:钓鱼岛东北冷涡是由底层海水涌升形成的中尺度冷涡,但其凸起的温盐等值线不能在海表面露头,不能从海表层水文特征识别该涡;该涡尺度在150km左右,其水团特征盐度为34.70—34.80,特征温度低于20°C;该涡是季节性冷涡,每年夏季都会出现,该涡5、6月份开始形成,到8月份强度最强,此时其向上涌升的趋势可以达到水深30m以浅,然后开始减弱,可以持续到10月份左右,其它时间则不存在;从50m层的温盐特征来看,不同年份夏季冷涡核心位置稍有不同,整体位置在123.2—124.2°E,26—27°N的范围内。
[Abstract]:Based on the investigation data of 7 voyages from 1987 to 2011, this paper reveals the fact that there is a cold vortex in the northeast waters of Diaoyu Island in summer, and for the first time calls it the Northeast Cold Vortex of Diaoyu Island, and preliminarily analyzes the characteristics of the Northeast Cold Vortex of Diaoyu Island and its growth and extinction law. The results show that the northeast cold vortex of Diaoyu Island is a mesoscale cold vortex formed by the upwelling of the bottom sea water, but its raised temperature and salt isolines can not be exposed on the sea surface and can not be identified from the hydrological characteristics of the sea surface, and the scale of the vortex is about 150km. The characteristic salinity of the water mass is 34.70-34.80 and the characteristic temperature is lower than 20 掳C. the vortex is a seasonal cold vortex, which occurs every summer. The vortex began to form in May and June, and the intensity was the strongest in August. At this time, the upward upwelling trend can reach 30 m shallow. From the characteristics of temperature and salt in 50m layer, the core position of summer cold vortex is slightly different in different years, and the whole position is in the range of 123.2-124.2 掳EW 26-27 掳N.
【作者单位】：中国科学院海洋研究所;中国科学院大学;
【基金】：国家自然科学基金委面上项目,41376031号;国家自然科学基金委青年项目,41306021号中国科学院战略性先导科技专项项目,XDA11020301号国家自然科学基金委员会-山东省人民政府联合资助海洋科学研究中心项目,U1406401号国家自然科学基金委员会-创新研究群体科学基金,41421005号
【分类号】：P731.2

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