北印度洋-南海季风区热带海洋极端波候变化特征  

Variations of extreme wave climate of tropical ocean and monsoon region in the north Indian Ocean-South China Sea

作　　者：傅晨 罗耀[1] 杨磊[1] 王东晓[1,2] 周峰华 FU Chen;LUO Yao;YANG Lei;WANG Dongxiao;ZHOU Fenghua(South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院南海海洋研究所,广州510301 [2]中国科学院大学,北京100049

出　　处：《南京信息工程大学学报（自然科学版）》2018年第3期379-385,共7页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：中国科学院国际合作局对外合作重点项目(131551KYSB20160002)

摘　　要：利用1979—2016年ERA-Interim有效波高(SWH)和海表风场数据,分析了南海-北印度洋极端海浪场分布和变化.结果表明:南海-北印度洋极端SWH分布和极端风速分布形态以及年际变化趋势高度一致,说明了涌浪为主的北印度洋和风浪为主的南海一样,极端SWH都由局地的极端风速控制;强极端SWH主要分布在阿拉伯海以及南海北部,阿拉伯海北部增长与该区域气旋强度增强有着密切关系,而南海的极端SWH主要受东北季风控制;东非沿岸极端SWH线性增长趋势则与索马里急流的年代际尺度上有逐渐增强的线性趋势有关.北印度洋及南海海域极端SWH距平场的EOF分析结果表明,南海极端SWH与北印度洋表现出反相变化的特征.北印度洋(南海海域)极端SWH多出现在西南季风(东北季风)期间,因为在西南季风(东北季风)期间,极端风速也相对增强.Using ERA-interim significant wave height(SWH)and sea surface wind field data from 1979 to 2016,the distribution and changes of extreme wave fields in the South China Sea-north Indian Ocean were analyzed.The results show that the extreme SWH distribution in the South China Sea-North Indian Ocean is highly consistent with extreme wind speed distribution patterns and inter-annual trends,reflecting the fact that extreme SWH is controlled by local extreme wind speeds in the north Indian Ocean and South China Sea.Strong extreme SWH occurs in the Arabian Sea and the northern part of the South China Sea.The growth of the northern Arabian Sea is closely related to the enhancement of cyclone intensity in the region.The extreme SWH in the South China Sea is mainly controlled by the northeast monsoon.The linear SWH growth trend in the east African coast is related to the increasing linear trend in the interdecadal scale of the Somali Jet.The EOF analysis of the extreme SWH anomalies in the north Indian Ocean and the South China Sea showed that the extreme SWH in the South China Sea and the north Indian Ocean showed reversed-phase changes.The extreme SWH in the north Indian Ocean(South China Sea)mostly occurs during the southwest monsoon(northeast monsoon)because extreme wind speeds also relatively increased during that period.

关 键 词：南海 北印度洋 极端波候 年际变化 

分 类 号：P731[天文地球—海洋科学]