黄海暖流源区水团组成百分比的年际变化

发布时间：2018-01-02 17:36

本文关键词：黄海暖流源区水团组成百分比的年际变化　出处：《天津科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：黄海暖流源区位于济州岛西南,横跨黄东海,毗邻日本海,为陆架浅海区域。研究区域处于黑潮、对马暖流、台湾暖流、黄海沿岸流、长江冲淡水以及黄海冷水团的综合作用区域,多种水团在此交汇。分析水团的分布和变动不仅在海洋渔业方面有重要作用,而且在海洋污染研究、海洋资源开发,乃至国防建设方面都有重要作用。研究水团特征的年际变化,有助于研究海洋大尺度热力状况和动力状况的变化规律以及它们和大气的相互作用。本文利用在西北太平洋采用“双向嵌套”技术,水平分辨率达到1/4°的NEMO模型的长达50年(1958-2007)的温度、盐度、流场数据集,从海洋水团分析的角度,基于浓度混合分析法,利用Matlab对研究区域进行水团划分,获取研究区内的水团的分布和变化情况,提取水团边界,然后获取冬夏季各个水团的体积百分比的时间序列,分析其年际变化特征。主要的结论如下：黄海暖流源区水团的个数有季节变化。冬季有2个水团,表底一致,东西两侧分别是黑潮上层水和东海陆架混合水,体积百分比分别是74%,26%,前者明显大于后者。夏季有3个水团,表底分别被不同的水团占据,表层东西两侧分别是黑潮表层水和东海表层水,黑潮次表层水覆盖底层,由深到浅逐渐变性,它们的体积百分比分别是35%,8%,54%。虽然黄海暖流源区水团个数有季节变化,但是冬夏季的水团个数没有年际变化,有年际变化的是水团在黄海暖流源区的体积。1958-2007年的50年中,黑潮上层水有9年为强年,9年为弱年,其余32年为平年。黑潮上层水和东海陆架混合水存在着-1的负相关,即在研究区是此消彼长的关系。所以黑潮上层水的强年就是东海陆架混合水的弱年,反之,也成立。二者的消长变化与黄海暖流、黄海沿岸流、台湾暖流的消长变化有密切关系。东海表层水有6年为强年,7年为弱年,其余37年为平年。东海表层水主要受长江冲淡水的影响,垂向厚度不大。其范围的年际变化主要体现在东西向的水平范围的大小,与黑潮表层水体积的年际变化存在着-0.45的负相关,与黑潮次表层水体积的年际变化没有相关关系。黑潮表层水有10年为强年,7年为弱年,其余33年为平年。黑潮次表层水有7年为强年,9年为弱年,其余34年为平年。黑潮表层水和黑潮次表层水存在着-0.88的负相关。黑潮次表层水的强年,往往是黑潮表层水的弱年,反之,也基本成立。黑潮次表层水主导研究区的底层,同时研究区的底层在有些年份还受到黄海冷水团南侵的冷水以及南下进入东海的高温黄海水的影响。
[Abstract]:The Yellow Sea source area is located in the southwest of Jeju Island, across Huang Donghai, adjacent to the sea of Japan, as the shelf sea area. The study area in the Tsushima warm current, Kuroshio, Taiwan warm current, the Yellow Sea coastal current, the comprehensive effect of Changjiang River and the Yellow Sea cold water mass area, a variety of water masses in this intersection. The distribution and variation analysis of water masses is not only important in marine fisheries, and marine pollution research, marine resources development, and national defense construction has an important role. Interannual variability of water mass characteristics, change law is helpful to the study of large scale ocean thermal conditions and dynamic conditions and their interaction with the atmosphere. This paper uses "two-way nested" technology in the northwest the Pacific Ocean, NEMO model horizontal resolution of 1/4 degree for 50 years (1958-2007) of temperature, salinity and flow field data sets from ocean water analysis point of view, based on the strong Mixed analysis method of water mass division of the study area by Matlab, the distribution and change of water masses in the region to obtain research situation, the volume percentage of the water mass boundary extraction, time sequence and then obtain each winter and summer water, analyzes its interannual variations. The following main conclusions: a number of the Yellow Sea water source area is seasonal changes. There are 2 water in winter, the bottom of the table, are things on both sides of the upper Kuroshio Water and the continental shelf of the East China Sea mixed water volume, the percentages were 74%, 26%, the former is obviously higher than the latter. In summer 3 water masses, the bottom of the table respectively occupied by different water masses, the surface on both sides of the Kuroshio surface water respectively. And the East China Sea surface water, the Kuroshio subsurface water covering the bottom, from deep to shallow gradually degenerated, their volume percentage were 35%, 8%, 54%. although the the Yellow Sea water source area in a number of seasonal changes, but the water in winter and summer. The number of no interannual variation, the interannual variability of.1958-2007 is the volume of water masses in the the Yellow Sea warm current in the source region of the 50 years, the upper water 9 years for years, 9 years for the weak years, the remaining 32 years for an average year. The upper water and the Continental shelf of the East China Sea mixed water exists -1 negative correlation. In the study area is a reciprocal relationship. So strong is the upper water west of the continental shelf of the East China Sea mixed water weak, on the other hand, is also set up. Changes of the two and the the Yellow Sea warm current, the Yellow Sea coastal current, there is a close relationship between the changes of Taiwan warm current. The East China Sea surface water 6 years to 7 years. For weak years, 37 years for the year. The rest of the East China Sea surface water is mainly affected by the Changjiang River, the vertical is not thick. The interannual variation of its range is mainly reflected in the size of the range to what level, and the interannual variation of the Kuroshio surface water volume has -0.45 negative correlation with the Kuroshio subsurface The interannual variation of water volume. There is no correlation between the Kuroshio surface water for 10 years for years, 7 years for the weak years, the remaining 33 years for the year. The Kuroshio subsurface water for 7 years for years, 9 years for the weak years, the remaining 34 years for the year. The Kuroshio surface water and Kuroshio exist -0.88 negative correlation. The black tide of subsurface water is strong, the Kuroshio surface water is weak, but also the basic establishment. The Kuroshio subsurface water bottom leading research area, and the bottom of the study area in some years but also by the cold water of the Yellow Sea cold water mass and the influence to invade the south south into the East China Sea Huang Haishui temperature.

【学位授予单位】：天津科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P731.16

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