东海西部近海春、秋季水团特征分析  

Characteristics analysis of water masses in the western East China Sea in spring and autumn

作　　者：朱佳[1] 胡建宇[1,2] 杨龙奇 陈照章 孙振宇[1,2] ZHU Jia;HU Jianyu;YANG Longqi;CHEN Zhaozhang;SUN Zhenyu(State Key Laboratory of Marine Environmental Science,College of Ocean and Earth Sciences,Xiamen University,Xiamen 361102,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519082,China)

机构地区：[1]厦门大学海洋与地球学院,近海海洋环境科学国家重点实验室,福建厦门361102 [2]南方海洋科学与工程广东省实验室(珠海),广东珠海519082

出　　处：《厦门大学学报（自然科学版）》2022年第5期888-895,共8页Journal of Xiamen University：Natural Science

基　　金：国家重点研发计划(2018YFC1406302);国家自然科学基金青年基金(42106005)。

摘　　要：水团的季节分布特征及温盐结构的时空变化对近海水文、气候渔场位置有着重要影响.基于东海西部近海春、秋季航次的温盐深实测资料,分析了温度和盐度在平面和垂向上的空间分布特征,并采用模糊聚类法及T-S相似度法将调查海域的水团划分为5类:闽浙沿岸水、混合水、台湾暖流水、黑潮表层水及黑潮次表层水.闽浙沿岸水在沿岸呈带状分布,春季其与混合水交汇时形成狭长的温、盐锋面.黑潮表层水在春季占据远岸海域深度<75 m的绝大部分海域,并在50 m层向岸延伸出两条高盐水舌;而在秋季仅分布在调查海域东北角,在东南部则被台湾暖流水取代.黑潮次表层水在春、秋季均存在跨陆架的涌升现象,秋季涌升至50 m层,并将台湾暖流水截断为南、北两部分.The seasonal distribution characteristics of water masses and the temporal and spatial variation of temperature-salinity structure have important influences on the hydrology,climate and fishery locations of offshore waters.Based on the CTD data gathered during spring and autumn cruises in the western East China Sea,the spatial distribution characteristics of temperature and salinity are analyzed.Using the fuzzy clustering method and T-S similarity method,5 water masses are classified as follows:the Min-Zhe coastal water,the mixed water,the Taiwan Warm Current water,the Kuroshio surface water and the Kuroshio subsurface water.The Min-Zhe coastal water is distributed in a zonal pattern along the west coast,forming a long and narrow strong front of temperature and salinity when it intersects with the mixed water in spring.The Kuroshio surface water occupies most of the offshore area shallower than 75 m in spring,with two high salinity water tongues extending to nearshore at the 50 m layer.In autumn,the Kuroshio surface water is only distributed in the northeast of the surveyed region and is replaced by the Taiwan Warm Current water in the southeast.The Kuroshio subsurface water upwells across the continental shelf in both spring and autumn,and it upwells to 50 m in autumn,cutting off the Taiwan Warm Current water into two parts.

关 键 词：东海西部近海 水团 模糊聚类法 T-S相似度法 

分 类 号：P731.23[天文地球—海洋科学]