ABSTRACT

By the dataset on the waters of Jiaozhou Bay from May to October 1980, the salinity level and its horizontal distribution are studied in this paper. The results showed that the varied range of salinity in the waters of Jiaozhou Bay was 24.67-31.93‰ from May to October, with an interval length of 7.26‰. The salinity of seawater reached 24.00‰ and above, but lower than 32.00‰. The monthly variation curve of the high value of salinity presented that the high value of salinity reached the lowest, 31.16‰, in August. The monthly variation curve of the low value of salinity presents that the low value of salinity reached the lowest, 24.67‰, in August. In the waters of Jiaozhou Bay, the high value and the low value of salinity reached their lowest in August. In May, June, July, and August, with the change of months, the high value of salinity in the water body of Jiaozhou Bay showed a decreasing change. In September and October, a high value of salinity showed an increasing change. Moreover, a high value of salinity appeared in the northwestern coastal waters of Jiaozhou Bay in May. In June, July, and August, the high value of salinity appeared in the southern waters outside of the bay mouth, the waters in the bay mouth + outside of the bay mouth (southern + northern waters outside of the bay mouth), and the southern waters outside of the bay mouth, respectively. In June, the descending rate of the high value of salinity was the largest, which indicated that the decrease of the high value of salinity was the fastest in the waters in the bay mouth and outside the bay mouth. At the same time, in September, the high value of salinity appeared in the southern waters outside the bay mouth and in the waters of bay mouth in October. In October, the ascending rate of the high value of salinity is large. In May, June, and August, the low value of salinity in the water body of Jiaozhou Bay showed a decreasing change; in July, the low value of salinity showed an increasing change; in September and October, the low value of salinity also showed an increasing change. From May to October, the low value of salinity appeared in the surrounding coastal waters of Jiaozhou Bay: southwestern coastal waters, northwestern coastal waters, and northeastern coastal waters. In August, the descending rate of the low value of salinity was the largest while the ascending rate was the largest in September.