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利用卫星观测OLR资料以及海气耦合数值模拟试验结果,从每年波-频分析结果提取了各种传播模态的强度指数序列,分析了热带北半球夏季季节内振荡(BSISO)各种传播模态的年际变化谱特征,探讨了热带各海区海气相互作用对其影响。主要结果如下:赤道外西传波和印度洋北传波以准2 a为显著振荡周期,赤道东传波、南海北传波和西太平洋北传波则都包含准2 a和准5 a两种周期,南海北传波是5种指数中惟一以准5 a为最主要周期振荡的模态。热带印度洋、西太平洋、东太平洋各海区海气相互作用对各指数准2 a振荡、准5 a振荡既有加强作用,也有削弱作用。各海区比较而言,对赤道东传波准2 a和准5 a振荡、南海北传波准2 a和准5 a振荡起最大加强作用的是西太平洋海区海气相互作用;对赤道外西传波准2 a振荡、西太平洋北传波准2 a和准5 a振荡起最大加强作用的是印度洋海区海气相互作用。
Based on the OLR data from satellite observations and the numerical simulation results of the ocean-atmosphere coupling, the intensity index sequences of various propagation modes are extracted from the annual wave-frequency analysis results, and the various propagation modes of summer intra-seasonal oscillations (BSISO) in the northern hemisphere are analyzed And the interannual variation of the sea-atmosphere interaction characteristics. The main results are as follows: The equatorial 2 a and the north equatorial equatorial equatorial wave propagate both in the equatorial 2 a and quasi 5 a Period, the North China Sea wave is the only one of the five kinds of indices to be the most dominant periodic oscillation of 5 a. In the tropical Indian Ocean, the Western Pacific Ocean and the East Pacific, the sea-air interaction agrees with the criterion 2 a for each index, and the quasi-5 a oscillation has both strengthening effect and weakening effect. In each sea area, the air-sea interaction in the western Pacific Ocean is the most significant for the easterly-2 a and quasi-5-a oscillations of the equatorial east-easterly waves and the northward easterly waves of the South China Sea and the quasi-5-a oscillations. The oscillation of the quasi-2-a oscillation is mainly due to the interaction of the sea-air in the Indian Ocean with the greatest enhancement of the north-west Pacific Ocean and the quasi 5-a oscillations.