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作者根据1986～1990年间中—美联合TOGA调查的CTD资料,应用模糊聚类法划分西太平洋北赤道流及其邻近海域(130°E断面)上部水域的水团,并描述它们的分布和主要特征及其对1986～1989年发生的El Nio和anti—El Nio事件的响应。结果表明,该海域的1000m以浅分布着四个水团:西太平洋热带表层水,北太平洋次表层水、北太平洋中层水和南极中层水。在1986～1987的El Nio年,海区的温跃层明显上移,大约上移了45m;“暖水池”(水温>28°C)的范围也明显缩小。在1988～1989的anti—El Nio年,研究海区“暖水池”的范围明显扩大;而且上均匀层的盐度降低了0. 30左右,近海表面的温度大约升高了0. 24°C。
Based on the CTD data from the Sino-US joint TOGA survey from 1986 to 1990, the authors applied fuzzy clustering to classify the water masses in the upper reaches of the western equatorial Pacific and its adjacent waters (130 ° E section) and describe their distribution and predominance Characteristics and their responses to the El Nio and anti-El Nio events that occurred between 1986 and 1989. The results show that there are four water masses in shallow depth of 1000m in this area: the western Pacific tropical surface water, the North Pacific sub-surface water, the North Pacific middle layer water and the Antarctic middle layer water. In El Nio years 1986-1987, the thermocline in the sea area shifted significantly upwards by about 45 m and the range of “warm pools” (water temperature> 28 ° C) was also significantly reduced. During the anti-El Nio years 1988-1989, the range of “warm pools” in the study area expanded significantly, and the salinity of the upper uniform layer decreased by about 0.30 and the temperature of the offshore surface increased by approximately 0.24 ° C.