台湾海峡西部海域温、盐度的时间变化

TIME VARIATION OF TEMPERATURE AND SALINITY IN WESTERN TAIWAN STRAIT

本文根据1984—1985年台湾海峡西部海域海洋综合调查资料,分析了海水温、盐度年、日较差及年、日变化特征,并对其成因进行了分析探讨。

This paper basing on comprahensively oceanic investigative data from 1984—1985 in western waters of Taiwan Strait.analyses the features of annual,and daily distribution of sea temperature and salinity,and the regularity of annual and daily variation.The results show that water temperature generally increases in march and discreases in September with the high in August and the low in February,with out difference in the whole strait;The salinity increases in the bottom layer in April and In the surface layer in between May and June.The highest salinity occurs in the southern waters in May and in the northern waters is between July and August,or in other words,the highast salinity occurs first in the southern waters,then in the northern uaters except for coastal surface layer there is an instable period of salinity after its gradual drop in between September and December.The branch of northern Kuroshio and south China sea water of high temperature and high salinity are the direct cause of the temperature and salinity increase in the western Taiwan Strait;The southward moving waters of low temperature and low salinity along Zhejiang-Fujian coasts is the main factor of temperature and salinity doop the river runoffs in wet season brings down the salinity a large scale in estuaries and inshore areas solar radiation has also important influnces on sea temperature,However,this paper considers tidal currents as the major regulating factor of the daily variation of temperature and salinity.