吴秋原,史本伟,黄远光,杨世伦.1979—2018 年长江口及邻近海域风速和波高的分布特征与变化趋势[J].海洋通报,2020,(4):
1979—2018 年长江口及邻近海域风速和波高的分布特征与变化趋势
Distribution and variation trend of wind speed and wave height in the Yangtze Estuary and adjacent seas from 1979 to 2018
投稿时间:2019-09-11  修订日期:2020-03-02
DOI:10.11840/j.issn.1001-6392.2020.04.007
中文关键词:  长江口  海表风速  有效波高  变化趋势
英文关键词:Yangtze estuary  surface wind speed  significant wave height  secular trend
基金项目:国家自然科学基金委-山东省联合基金 (U1606401); 国家自然科学基金 (41576092); 科技部重点专项(2016YFA0600901; 2016YFE0133700)
作者单位E-mail
吴秋原 国家海洋信息中心天津 300171 akihara@qq.com 
史本伟 国家海洋信息中心天津 300171  
黄远光 国家海洋信息中心天津 300171  
杨世伦 国家海洋信息中心天津 300171 slyang@sklec.ecnu.edu.cn 
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中文摘要:
      本文基于欧洲中期天气预报中心 (ECMWF) 的 ERA5 与 ERA-Interim 再分析资料,提取长江口及其邻近海域1979— 2018 年间共 40 年的风场和海浪场数据,探讨该海域风浪和波高的时空变化特征,EOF 经验正交函数分解法分析结果显示风速与波高的数值在外海普遍高于近岸,且符合长江口所在东海海域受盛行东亚季风影响的特征。Mann-Kendall 检验法分析结果显示,在 1979—2018 年间该海域海表面年均风速呈增长趋势,平均增长速率为 0.228 cm/(s·a),累计增长 1.6 %;年均有效波高呈增长趋势,平均增长速率为 0.120 cm/a,累计增长 5.4 %;年风速和波高的极端值也呈不同程度的增长趋势。
英文摘要:
      Based on ERA5 and ERA-Interim Reanalysis data of ECMWF, sea surface wind and wave field datasets in the Yangtze Estuary and adjacent seas from 1979 to 2018 are extracted out. By using EOF method, the spatial distribution of wind speed and significant wave height and statistical of their seasonal variation are analyzed. Results found that wind speed and wave height in open seas were generally higher than in nearshore areas, and were consistent with the truth that climate of the East China Sea is controlled by the East Asian Monsoon circulation. The Mann-kendall is used to analyze the variation trend of wind speed and wave height. Results found that the sea surface wind speed in the research area had an obvious increasing trend as a whole by 1.6 % during the recent 40 years, of about 0.228 cm/(s窑a) and significant wave height had an obvious increasing trend as a whole by 5.4 % during the 40 years, of about 0.120 cm/a. In addition, wind speed and wave height showed different levels of increasing trend in extreme conditions.
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