北黄海底层冷水团的变化特征及其对外长山岛海区养殖扇贝死亡的影响

THE CHARACTERISTICS OF COLD WATER MASS VARIATION AT THE BOTTOM OF THE NORTH YELLOW SEA AND ITS HYDROLOGICAL EFFECTS ON THE MORTALITY OF SHELLFISH CULTURED IN THE WATERS OF OUTER CHANG-SHAN ISLANDS

应用模糊聚类软划分算法,对北黄海底层水团进行了分析.根据分析的结果,可将该海区划分为三个水团:北黄海沿岸水、北黄海水团和北黄海冷水团,进而讨论了三个水团的月变化特征,北黄海冷水团的多年变化特征,以及冷水团温度变化与气温变化之间的关系.最后,还分析了小长山与老虎滩海洋站气温变化与獐子岛养殖扇贝死亡率之间的关系,并提出了预测扇贝死亡率的回归模式.

In this paper, by using ISODATA of fuzzy cluster method, the water masses classification of bottom layer in the north Yellow Sea in carried out. On the basis of the result analysis , the waters of this area can be divided into three water masses, i. e. , the coastal Water Mass of the North Yellow Sea, the Water Mass of the North Yellow Sea and the Cold Water Mass of the North Yellow Sea, and then we discuss the monthly varied characters of the three water masses, the multi-year varied characters of the North Yellow Sea Cold Water Mass and a relation with air temperature. Finally, besides analyzing the relationship between the air temperature variation at Xiao-Changshan and Lao-Hutan coastal stations and the mortality of shellfish cultured in the Zhang-Zi island, a regression model to predict the mortality of cultivated shellfish is also established.