基于融合遥感数据的广东沿岸温度锋面的季节变化研究*

doi:10.11978/2016125

热带海洋学报 ›› 2017, Vol. 36 ›› Issue (5): 16-23.doi: 10.11978/2016125CSTR: 32234.14.2016125

所属专题：海洋大数据及应用

基于融合遥感数据的广东沿岸温度锋面的季节变化研究^*

邱春华(), 崔永生, 胡诗琪, 霍丹

中山大学海洋科学学院, 近岸海洋科学与技术中心, 广东广州, 510275

收稿日期:2016-12-01 修回日期:2017-01-11 出版日期:2017-09-20 发布日期:2017-09-22
作者简介:
作者简介：邱春华(1983—), 女, 山东省滨州市人, 副教授, 博士, 主要从事海气相互作用、海洋环流等研究工作。E-mail: qiuchh3@mail. sysu.edu.cn
基金资助:
国家重点研发计划(2017YFC0305804);国家自然科学基金青年基金项目(41406002);广东省自然科学基金自由申请项目(2015A030313151);中山大学高校基本科研业务费优秀青年教师重点培育项目(17lgzd11)

Seasonal variation of Guangdong coastal thermal front based on merged satellite data

Chunhua QIU(), Yongsheng CUI, Shiqi HU, Dan HUO

The Center for Coastal Ocean Science and Technology, School of Marine Sciences, Sun Yat-sen University, Guangzhou 510275, China

Received:2016-12-01 Revised:2017-01-11 Online:2017-09-20 Published:2017-09-22
About author:
Author:QIU Chunhua.E-mail: qiuchh3@mail. sysu.edu.cn
Supported by:
National Key R&D Program of China (2017YFC0305804);Young Scientists Fund of the National Natural Science Foundation of China (41406002);Natural Science Foundation of Guangdong Province (2015A030313151);Distinguished Young Teachers of Fundamental Research Funds for the Central Universities (17lgzd11)

摘要/Abstract

摘要：

基于2015年全年多源遥感数据融合的Operational Sea Surface Temperature and Sea Ice Analysis(OSTIA)海表温度数据, 利用最大温度梯度法, 对广东沿岸(20°—23°N, 110°—118°E)海表温度锋面的季节变化及生消机制进行了分析。广东沿岸温度锋面季节变化明显, 冬季强, 夏季弱;粤东温度锋面常年存在, 粤西温度锋面夏季消失;珠江口区域温度锋面与珠江羽状流的扩散路径有关, 即夏季锋面主轴往东北方向延伸, 秋季往西南方向延伸。对比温度锋面与风速的关系, 发现其形成及消失受季风的影响。通过简单的模型实验, 发现季风通过影响锋面两侧的湍流热通量引起锋面强度的变化: 西南(东北)季风带来的暖湿(干冷)空气减弱(增加)了近岸冷水的潜热释放, 导致冷水区温度上升(下降)大于暖水区, 引起锋面消失(生成)。

关键词: 温度锋面, 广东沿岸, 时空变化, 羽状流

Abstract:

Based on the Operational Sea Surface Temperature and Sea Ice Analysis (OSTIA) data in 2015, we analyzed the seasonal variation and genesis mechanisms of thermal fronts in Guangdong coastal zone. The Guangdong coastal thermal fronts are strong in winter and weak in summer. In the eastern Guangdong coastal zone, thermal fronts are seen all year round, while in the western Guangdong coastal zone, thermal fronts disappear in summer. In the Pearl River estuary zone, thermal fronts are associated with the Pearl River plumes, which extend east northward in summer and southward in autumn. We suggest wind speed play important roles in the genesis and disappearance of these thermal fronts. Using a simple model, we find that monsoon influences the front strength through air-sea turbulent heat fluxes. Under southwesterly (northeasterly) wind condition, warm and wet (cold and dry) air mass could decrease (increase) the latent heat release near the cold coastal zone, leading to a temperature increase in the cold zone, and finally the front disappears.

Key words: thermal front, Guangdong coastal zone, temporal and spatial variation, river plume

邱春华, 崔永生, 胡诗琪, 霍丹. 基于融合遥感数据的广东沿岸温度锋面的季节变化研究^*[J]. 热带海洋学报, 2017, 36(5): 16-23.

Chunhua QIU, Yongsheng CUI, Shiqi HU, Dan HUO. Seasonal variation of Guangdong coastal thermal front based on merged satellite data[J]. Journal of Tropical Oceanography, 2017, 36(5): 16-23.

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基于融合遥感数据的广东沿岸温度锋面的季节变化研究^*

Seasonal variation of Guangdong coastal thermal front based on merged satellite data

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