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本文依据1983,1984,1987,1988几年的有关资料,利用“对应分析法”对台湾海峡中、北部海域春、夏季(5—8月)的水团及有关问题进行了分析。结果表明:(1)5—8月间该海域存在两种水团分布类型,其中5月属冬季型,全海域存在浙闽沿岸水和海峡暖流水两个水团;6—8月属夏季型,全海域均为海峡暖流水盘踞,按温度不同,它又分为上层水和深层水两部分。(2)浙闽沿岸水具低温、低盐、高溶解氧特征,均一性较差,年际变异较大;海峡暖流水以高盐为主要特征,温、盐度和溶解氧分布较均匀,且诸特征相对稳定。(3)海峡东、西两侧均存在上升流现象,西侧的上升流出现于6—8月,中心在海潭岛附近;东侧的上升流7月见于澎湖群岛北方海区。(4)6—8月间,海峡暖流深层水(核心)主要沿海峡偏西一侧北上,而不是紧靠东侧径直向北。
Based on the relevant information of 1983, 1984, 1987 and 1988, this paper analyzes the water masses in spring and summer (May - August) in the middle and northern part of the Taiwan Strait by using the “Correspondence Analysis Method”. The results show that: (1) There are two types of water mass distribution in the sea from May to August, of which winter belongs to winter in May, there are two water masses of warm water in Zhejiang Province and Fujian Strait in the whole sea area; Type, the entire sea are strait warm water entrenched, according to the temperature is different, it is divided into upper and deep water two parts. (2) The characteristics of low temperature, low salt and dissolved oxygen in Zhejiang-Fujian coastal water are poor, and the interannual variability is great. The warm water in the Straits is characterized by high salt, and the distribution of temperature, salinity and dissolved oxygen is more uniform, The features are relatively stable. (3) The upwelling phenomenon exists on both east and west sides of the Strait. The rising stream on the west side appears in June-August and the center is near Haitan Lake. The rising stream on the east side is found in the northern sea area of Penghu Islands in July. (4) In the period from June to August, the deep channel (core) of the warm current in the Straits flows westward on the west side of the main isthmus rather than on the north side of the east side.