Water masses classification of the upper layer in the Equatorial Western Pacific using ISODATA of fuzzy cluster

In this paper,by using ISODATA of fuzzy cluster,the water masses classification of the upper layer in the E-quatorial Western Pacific is carried out.On the basis of the degree of the membership in the obtained optimal classification matrix,the solid distribution of the detailed structure of water masses is made.The water of the upper layer,consisting of six water masses,may be divided into three layers,i,e.,the surface,subsurface and intermediate layer.Besides analyzing the features of various water masses,a discussion on their distribution structure and formation mechanism is also made.