海洋科学2017，Vol.41Issue(10)：1-9,9.DOI:10.11759/hykx20170307002
春季长江口外上升流的月际变化——以123°E断面为例
Monthly variation of upwelling area off the Changjiang River Estuary in spring
摘要
Abstract
To analyze the monthly variation in the hydrographic upwelling features off the Changjiang River Estuary in spring,we investigated the hydrographic environment of the sea area using conductivity-temperature-depth (CTD) sensors in April,May,and June 2015.The survey data of the 123°E section show that the upwelling was persistent during spring.The upwelling water was mainly characterized by high salinity and originated from Taiwan Warm Current water,which upwelled along the submerged slope off the estuary as it flowed northward.We observed the upwelling to strengthen monthly and reach the 10 m layer in June.During the investigation period,the surface cold saline water was rapidly replaced by warm fresh water,whereas the upwelling water was relatively stable.Thus,the intensities of the thermocline and halocline tended to increase and the halocline gradually advanced northward.According to our analysis results,the strength of the northward flow of the Taiwan Warm Current became stronger from April to June,so it could be a major factor influencing the monthly variation in upwelling.The results also show that the influence of diluted the Changjiang River water increased monthly and caused an intensive thermocline and halocline,which ultimately restrained the upwelling.In addition,although the Northern Jiangsu coastal current is an important water mass in the adjacent Changjiang River Estuary area,it had the least effect on upwelling.关键词
上升流/水文特征/长江口/春季Key words
upwelling/hydrographic features/the Changjiang River Estuary/spring分类
海洋科学引用本文复制引用
要津,王珍岩..春季长江口外上升流的月际变化——以123°E断面为例[J].海洋科学,2017,41(10):1-9,9.基金项目
国家自然科学基金项目(41476045) （41476045）
中国科学院战略性先导科技专项(A类)(XDA11020600,XDA11030103)National Natural Science Foundation of China,No.41476045 （A类）
Strategic Priority Research Program of the Chinese Academy of Sciences,No.XDA11020600,No.XDA11030103 （）
