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通过对1976年和1979年6—8月澳大利亚高压(以1000hPa平均涡度代表)与中国华北15个站24小时降水量的功率谱、交叉谱分析,发现两者在准一周周期处有较高的凝聚值,并呈反位相相关。即澳大利亚有冷空气爆发时,有利于华北产生大范围的大到暴雨。由1976年5—8月澳大利亚高压与南、北半球有关环流系统的物理量的交叉谱,发现在6.9天周期处均有较高的凝聚值,而且位相由小到大,进一步说明了澳大利亚高压与中国北方降水遥相关的影响过程。
By the cross spectrum analysis of the power spectrum and cross spectrum of the high pressure in Australia (represented by 1000hPa mean vorticity) from 1976 to 1979 and the 24 stations in North China from 1976 to 1979, both of them show higher quasi-one-week period The cohesion value, and anti-phase correlation. That is when Australia has a cold air outburst, it is conducive to a wide range of heavy rain in North China. From May to August 1976, the cross spectrum of the physical quantities of the Australian high pressure system and the circulation systems in the southern and northern hemispheres showed that the higher the cohesive value at the 6.9-day cycle and the smaller the phase, further illustrated the correlation between the Australian high pressure and China The impact of the teleconnection of northern precipitation.