华东师范大学学报（自然科学版） >

2018 , Vol. 2018 >Issue 1: 146 - 153,170

DOI: https://doi.org/10.3969/j.issn.1000-5641.2018.01.014

地理学

江苏沿海2016年夏季冷水块的特征分析

  • 何占元 ,
  • 张文静 ,
  • 朱首贤 ,
  • 陈阳 ,
  • 郑后俊
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  • 1. 河海大学 海洋学院, 南京 210098;
    2. 国防科技大学 气象海洋学院, 南京 211101
何占元,男,博士研究生,研究方向为海洋动力学与数值模拟.E-mail:zyhe141592@163.com.

收稿日期: 2017-02-27

  网络出版日期: 2018-01-11

基金资助

国家自然科学基金（41376012，41076048，41275029）；中央高校基本科研业务费项目（2011B05714，2014B06514）

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Analysis of characteristics of the cold water patch off the Jiangsu coast in summer 2016

  • HE Zhan-yuan ,
  • ZHANG Wen-jing ,
  • ZHU Shou-xian ,
  • CHEN Yang ,
  • ZHENG Hou-jun
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  • 1. College of Oceanography, Hohai University, Nanjing 210098, China;
    2. College of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101, China

Received date: 2017-02-27

  Online published: 2018-01-11

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摘要

利用走航CTD观测资料和AVHRR资料分析了江苏沿海2016年夏季（6-8月）冷水块特征.7月18-21日的走航CTD观测资料表明，从海面到30m层都存在冷中心，冷中心逐层向东倾斜，显示存在从黄海沿底部向江苏沿海输送冷水的通道.AVHRR资料的月平均海表温均存在冷水块，其半径为67.9~85.8 km，强度为0.5~1.2℃，冷水块中心与沿岸温差为1.9~2.9℃；逐日的海表温有78d存在冷水块，最大半径161.8 km，最大强度2.8℃，与沿岸最大温差为5.9℃，其中心位置变化大，相邻两天中心位置的最大距离为125.4 km.逐日冷水块和风场对比分析表明，南风有利于冷水块的生成.

关键词： 江苏沿海; 冷水块; 观测; AVHRR; 风场

本文引用格式

何占元 , 张文静 , 朱首贤 , 陈阳 , 郑后俊 . 江苏沿海2016年夏季冷水块的特征分析[J]. 华东师范大学学报（自然科学版）, 2018 , 2018(1) : 146 -153,170 . DOI: 10.3969/j.issn.1000-5641.2018.01.014

Abstract

In this paper, the analysis of characteristics of a cold water patch (CWP) off the Jiangsu coast is carried out based on in-situ oceanographic observations using CTD and remote sensing data made by the Advanced Very High Resolution Radiometer (AVHRR)in the period of summer 2016 from June to Augst. Analysis of the CTD data demonstrates that relatively cold waters occurred at different depths from the sea surface to 30 m over the study region in summer 2016, with the center of the cold waters leaning to the east at deeper depth. This confirms the transportation of cold subsurface waters from the bottom of the Yellow Sea to the Jiangsu coast. The distributions of monthly averaged AVHRR Sea Surface Temperature (SST) demonstrate the existence of CWP, the radius of which varies from 67.9 km to 85.8 km, the intensity from 0.5℃ to 1.2℃, the temperature difference between the CWP center and the coast at the same latitude from 1.9℃ to 2.9℃. The daily distribution of SST indicates that there are 78 days existing CWP, among which the maximum radius is 161.8 km, the maximum intensity is 2.8℃, the maximum temperature difference is 5.9℃. The daily position of CWP center ranges in a large area, the longest distance between two adjacent days is 125.4 km. The effect of the surface wind forcing on the cold water area is also examined using a correlation analysis of the estimated radius and intensity of the CWP with surface winds, which came to a conclusion the southerly wind plays an important role in developing the CWP.

Key words： Jiangsu coast; cold water patch; observation; AVHRR; wind field

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