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本文应用带通滤波统计方法,研究了热带不同地区准二年周期振荡的海表温度与冬季500hPa高度场之间的时滞相关。结果表明,不同热带太平洋地区(西、中、东太平洋)海温对中高纬度大气环流的影响,或严格地说,它们之间的相互影响是不同的。在不同纬圈上,相关系数可以有规则的向东或向西传播。同时在不同径圈上也可以向极地或赤道传播。传播的方向和位置依赖于热带海表温度所在的经度。由于传播的速度十分缓慢,平均约2年80—210个经度,或2年约60个纬度。因此可以认为不属于经典的Rossby波,而是一种新的海气相互作用波。
In this paper, the band-pass filtering method is used to study the correlation between the sea surface temperature and the winter 500hPa geopotential height field in quasi-biennial periodic oscillations in different tropical regions. The results show that the effects of SST in different tropical Pacific (West, Central and Eastern Pacific) on atmospheric circulation in the middle and high latitudes, or strictly speaking, are different. At different latitudes, the correlation coefficient can be regularly transmitted eastward or westward. At the same time in different circles can also be polar or equatorial transmission. The direction and location of the spread depends on the longitude of the tropical sea surface temperature. Due to the slow speed of dissemination, there are an average of about 80-210 longitudes over two years or about 60 latitudes over two years. So it can be considered as not a classic Rossby wave, but a new wave of sea-air interaction.