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热带海洋学报 >

2016 , Vol. 35 >Issue 5: 1 - 9

DOI: https://doi.org/10.11978/2015141

海洋水文学

琼东和粤西海表温度锋的季节与年际变化特征分析*

  • 陈彪 ,
  • 王静 ,
  • 经志友 ,
  • 李敏
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  • 1. 中山大学地理科学与规划学院, 广东省城市化与地理空间模拟重点实验室, 广东 广州 510275; 2. 热带海洋环境国家重点实验室(中国科学院南海海洋研究所), 广东 广州510301; 3. 广东省近海海洋变化与灾害预警重点实验室, 广东 湛江524088;
陈彪(1991—), 男, 广东省梅州市人, 硕士研究生, 主要从事海洋遥感信息应用研究。E-mail: chenb25@mail2.sysu.edu.cn

收稿日期: 2015-11-24

  网络出版日期: 2016-09-22

基金资助

基金项目：国家自然科学基金项目(41276108、41276022、41230962)

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Seasonal and interannual variation of thermal fronts off the east coast of Hainan Island and the west coast of Guangdong

  • CHEN Biao ,
  • WANG Jing ,
  • JING Zhiyou ,
  • LI Min
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  • 1. Guangdong Key Laboratory for Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China; 2. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China; 3. Guangdong Province Key Laboratory for Coastal Ocean Variation and Disaster Prediction (GLOD), Zhanjiang 524088, China;
英文作者简介

Received date: 2015-11-24

  Online published: 2016-09-22

Supported by

Foundation item: National Natural Science Foundation of China (41276108、41276022、41230962)

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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。

关键词： 琼东; 粤西; 温度锋; 边缘检测; 季节变化; 年际变化

本文引用格式

陈彪 , 王静 , 经志友 , 李敏 . 琼东和粤西海表温度锋的季节与年际变化特征分析*[J]. 热带海洋学报, 2016 , 35(5) : 1 -9 . DOI: 10.11978/2015141

Abstract

The seasonal and interannual variation of sea surface temperature (SST) fronts off the east coast of Hainan Island and the west coast of Guangdong are investigated by detecting their intensities and central positions using 8-year (2006-2013) GHRSST data and edge detection methods. Potential mechanisms for their variations are then examined via correlation analysis of sea level anomalies and sea surface winds. The results show that the spatial distribution and intensity of the SST fronts off the east coast of Hainan Island and the west coast of Guangdong have obvious seasonal variation, which is driven primarily by the wind forcing. In summer, the SST fronts are located off the east and south coast of Hainan Island; in winter, they are mostly anchored in the east coast of Hainan Island and the west coast of Guangdong. The intensity of thermal front varies with the seasonal wind forcing, which is the strongest in winter with 3℃•100km-1 and is the weakest in fall with 1.4℃•100km-1; 2.1℃•100km-1 and 1.7℃•100km-1 were recorded in spring and summer, respectively. Besides, the results from the center and intensity of SST fronts show pronounced interannual variability of these fronts off the east coast of Hainan Island and west coast of Guangdong.

Key words： east coast of Hainan Island; west coast of Guangdong; SST front; edge detection; seasonal variation; interannual variation

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