琼东和粤西海表温度锋的季节与年际变化特征分析

发布时间：2018-04-01 23:08

  本文选题：琼东　切入点：粤西　出处：《热带海洋学报》2016年05期

【摘要】：以2006—2013年卫星遥感海表温度资料(GHRSST SST)为基础,通过数字图像处理的边缘检测方法提取温度锋面的核心位置,分析了琼东、粤西海域海表温度锋位置及强度的季节变化和年际变化特征,并进一步结合海面高度异常资料和海面风场资料探讨了温度锋变化的可能机制。分析结果表明,琼东、粤西海域温度锋的空间分布及锋面强度存在显著的季节变化,沿岸风应力是影响该海域锋面变化的主要动力因素。夏季温度锋面主要分布于琼东沿岸的东部及南部海域近岸50m到100m等深线之间,而冬季则主要分布在琼东的东部海域和粤西沿岸20m到100m等深线之间,春秋两季为其过渡季节;锋面强度的季节变化表现为冬季最强,春季、夏季次之,秋季最弱,其冬季锋面强度平均值可达到3℃?100km 1,夏季为1.7℃?100km 1;同时,锋面核心位置及强度的分析结果表明,琼东和粤西海域温度锋也存在较强的年际变化。
[Abstract]:Based on satellite remote sensing sea surface temperature data (GHRSST SST) from 2006 to 2013, the core position of temperature front is extracted by edge detection method of digital image processing. The seasonal and interannual variation characteristics of the position and intensity of sea surface temperature front in western Guangdong are discussed, and the possible mechanism of temperature front variation is discussed by combining the sea surface height anomaly data and sea surface wind field data. The spatial distribution of the temperature front and the intensity of the front in western Guangdong have significant seasonal variations. The coastal wind stress is the main dynamic factor affecting the variation of the sea front, and the summer temperature front mainly distributes between the isobath of 50 m to 100 m in the eastern and southern coastal areas of east and south of Qiongdong. In winter, it mainly distributes between the eastern sea area of Qiongdong and the isobath between 20m and 100m along the coast of western Guangdong, and the transition season is spring and autumn, the seasonal variation of frontal intensity is the strongest in winter, followed by spring, summer and autumn. The average winter frontal strength can reach 3 鈩，

本文编号：1697692