跃层谱表达法及自适应识别对南黄海西部温跃层的应用分析

发布时间：2018-05-02 10:25

本文选题：海洋层结谱表达法及自适应识别 + 温跃层　；参考：《国家海洋局第一海洋研究所》2017年硕士论文

【摘要】：本文利用2006-07的温盐实测资料,分别采用海洋层结谱表达法及自适应识别,和传统跃层确定方法对资料进行处理分析。对两种方法在识别跃层时,对各种不同类型跃层的确定结果进行比较。形成海洋层结谱表达法及自适应识别下的“五点三要素图”,传统跃层确定方法下的跃层深度、及强度要素平面分布图,分析夏季跃层的分布特点,分析表明:1)夏季温跃层产生的普遍原因是海表由于太阳辐射温度升高,与下层水间的温差导致温跃层产生,温跃层深度自西向东,随水深增大而增大,强度强的温跃层深度较浅厚度较薄,强度弱的温跃层深度较深厚度较大。2)夏季逆温跃层是由于黄海暖流残余水与黄海冷水团的共同作用产生的。3)跃层谱表达法及自适应识别法更加完整地确定、表达了跃层。没有人为规定最低标准,检测结果更加客观。在多跃层的确定中没有忽略温度垂向梯度中客观存在的变化,更加细致地体现出了其实际情况。此外,本文利用南黄海西部2007-04的温盐实测资料,细致的分析了该海区的逆温跃层特征。采用海洋层结谱表达法及自适应识别,得到逆温跃层的“五点三要素”,形成强度要素平面分布图。分析表明,逆温跃层的存在与黄海暖流水有直接的关系:1)4月份,黄海暖流水受到的海面冷却仍是产生逆温跃层的普遍原因,在该海区黄海暖流向北延伸和向两侧拓展的区域都有该种类型的逆温跃层存在,位置相对较浅;2)但在偏南的黄海暖流主干区,海面冷却产生的效应被主流区的热量补充所抵消,逆温跃层很弱甚至消失,这是该月份逆温跃层分布区向北退缩并在南部中心附近呈现缺失区的主要原因;3)南下的鲁北沿岸流水的冷水叠加在黄海暖流水的暖水上方,使逆温跃层加强,使得冷暖水的作用区成为强逆温跃层区;4)黄海暖流左侧冷沿岸流水及右侧冷水的前端向黄海暖流楔入,其前端往往覆盖在底层高温高盐的黄海暖流水上方形成下逆温跃层,从而形成双逆温跃层。这些特点,较以前认知更加客观、全面、细致和准确。
[Abstract]:In this paper, the temperature and salt data of 2006-07 are used to process and analyze the data, respectively, by using marine stratification spectrum expression and adaptive recognition, and the traditional cline determination method. The determination results of different types of clines are compared when the two methods are used to identify the clines. The "5.3 element map" of marine stratification spectrum expression and adaptive recognition is formed, and the depth of cline and the plane distribution map of intensity elements under the traditional method of determining the cline are formed, and the distribution characteristics of the thermocline in summer are analyzed. The analysis shows that the common cause of the thermocline in summer is that the thermocline is produced by the temperature difference between the sea surface and the lower water, and the depth of the thermocline increases from west to east, and increases with the increase of water depth. The depth of the thermocline with strong strength is thinner than that of the shallow cline. The depth of the thermocline with weak strength is deeper than that of the thermocline. 2) the thermocline layer in summer is determined by the interaction of Huang Hai warm current residual water and Huang Hai cold water mass. 3) the thermocline spectrum expression method and adaptive identification method are more complete and express the thermocline layer. There is no artificial minimum standard, and the test results are more objective. The objective changes in the vertical gradient of temperature are not ignored in the determination of the multicline, and the actual situation is reflected in more detail. In addition, the characteristics of the inversion thermocline in the sea area are analyzed in detail by using the measured data of temperature and salt in the west of South Huang Hai in 2007-04. The "5.3 elements" of the inversion thermocline are obtained by using the expression of ocean stratification spectrum and adaptive recognition, and the plane distribution map of the intensity elements is formed. The analysis shows that the existence of inverse thermocline is directly related to Huang Hai warm current water. In April, the sea surface cooling of Huang Hai warm current water is still the common cause of the inversion thermocline. This type of inverse thermocline exists in the area where the Huang Hai warm current extends northward and extends to both sides, and the position is relatively shallow. However, in the southerly Huang Hai warm current trunk area, the effect of sea surface cooling is offset by the heat recharge in the mainstream area. The inversion thermocline is very weak or even disappeared, which is the main reason why the distribution area of the inversion thermocline retreats northward and presents a missing area near the center of the south.) the cold water of the flowing water along the north coast of Shandong Province is superimposed on the warm water of the Huang Hai warm current. Strengthen the thermocline and make the action zone of cold and warm water become the strong inversion thermocline area (4) Huang Hai warm current the cold coastal water on the left and the front end of the right cold water wedge into the Huang Hai warm current, Its front end often covers the bottom layer of high temperature and high salt in Huang Hai warm current water to form a lower inversion thermocline, thus forming a double inversion thermocline. These characteristics are more objective, comprehensive, meticulous and accurate than previous cognition.
【学位授予单位】：国家海洋局第一海洋研究所
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P714

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