南海北部海区水团分析

ANALYSIS OF WATER MASSES IN THE NOR-THERN AREA OF THE SOUTH CHINA SEA

以模糊聚类为主要方法,在南海北部海区划出8个水团:沿岸冲淡水团(F)、近岸混合水团(M)、暖表层水团(WS)、表层水团(S)、表-次层混合水团(SU)、次层水团(U)、次-中层混合水团(UI)和中层水团(I).对各水团的形成、基本特征、变性特点以及消长变化和分布规律进行了综合分析.可将它们分为3种类型:径流冲淡型——F,浅海变性型——M、WS、S、SU和深海大洋型——U、UI和I.

In this paper, according to t -S Diagram and by using the fuzzy cluster as a main method, the waters in the northern area of the South China Sea have been divided into eight water masses : the Nearshore Diluted Water Mass (F), the Shore Mixed Water Mass (M), the Warm Surface Water Mass (WS), the Surface Water Mass (S), the Surface-Subsurface Mixed Water Mass (SU), the Subsurface Water Mass (U), the Subsurface Intermediate Mixed Water Mass (UI) and the Intermediate Water Mass (I). The formative mechanism,basic characteristics, modified features, growing and declining and the distribution regularities of different water masses in this area are studied by comprehensive analysis in the paper. These water masses are divided into three types: the type of runoff-diluted water-F, the type of shallow -modified water-M, WS, S and SU and the type of oceanic -deep water-U, UI, I.