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本文利用日本气象厅于1967—1987年间沿137°E经向断面上的水文观测资料,并运用经验正交函数对特定区域次表层的温度剖面场进行了分解,同时计算了对应区域的地转流通量,指出热带西太平洋热含量变化最显著的区域是逆流槽附近的次表层(50—300m),该层的热含量可以作为研究ENSO现象的重要特征量。同时还指出,次表层热含量的年际变化,与海流的变化有内在的联系,并与埃尔尼诺事件和黑潮变异密切相关。
In this paper, the hydrographic data along the 137 ° E meridional section of Japan Meteorological Agency from 1967 to 1987 are used to decompose the temperature profile of subsurface in a specific region by the empirical orthogonal function. Meanwhile, It is pointed out that the most significant change in the tropical Pacific over the tropical Pacific is the subsurface (50-300 m) near the countercurrent trough, and the heat content of this layer can be used as an important feature for studying the ENSO phenomenon. At the same time, it is also pointed out that the interannual variation of subsurface heat content is intrinsically linked with the change of ocean current and closely related to El Niño event and Kuroshio mutation.