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本文对黑潮海域和赤道东太平洋1954—1983年月平均海面温度距平,分别施以经验正交函数分解,并采用数字滤波、相关分析和合成研究等方法进行了分析。结果发现,这两个海域存在不同频段的低频振荡,其中在准两年周期里,黑潮流域对赤道东太平洋水温振荡存在明显的响应,并具有约6个月的位相落后;而在周期大于28个月的振荡中,这种响应很弱且仅限于20°N以南。
In this paper, monthly average sea surface temperature anomalies in the Kuroshio and Equatorial Eastern Pacific from 1954 to 1983 are respectively subjected to empirical orthogonal function decomposition and analyzed by means of digital filtering, correlation analysis and synthetic study. The results show that there are low frequency oscillations in different frequency bands in these two sea areas. In the quasi-two-year period, the Kuroshio watershed has a clear response to the water temperature oscillations in the equatorial Eastern Pacific and has a phase backward of about 6 months. When the period is longer than In the 28-month oscillations, this response is weak and confined to just south of 20 ° N.