【摘要】 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。更多还原

【Abstract】 The data used in this paper was from the Sino -American Joint TOGA Program from 1986 to 1990. The water masses in the upper part of the North Equatorial Current and adjacent area of 130°E section in the western tropical Pacific Ocan were classified by using clustering method. The variation in the features of water masses and responses to the El - Nino and La - Nina Events,which occurred between 1986 to 1989,were described. It was indicated that there were four water masses within 1000 m depth in the studied area:western Pacific tropical surface water,north Pacific subsurface water,north Pacific intermediate water and Antarctic intermediate water. In 1986 - 87 El - Nino years, the thermocline obviously moved up by about 45 meters and the range of Warming Pool(T>28℃)dwindled in the area. In 1988 - 89 La -Nina years,the range of the pool grew much larger and the salinity in the well - mixed surface layer decreased by about 0. 30 and the temperature near sea surface increased by about 0. 24℃.更多还原