| 摘要: |
| 本文利用1982年7—9月地面气压,850、500hPa高度和温度,广东地区测站的雨量等资料,进行功率谱、交叉谱、凝聚谱以及相关系数的计算。结果表明,这年夏季,印缅槽存在准三周的周期振荡,澳大利亚冷高压存在准两周的周期振荡,两者叠加的结果,与广东地区降水存在的准两周和准一周的振荡周期相吻合。研究还指出,这两个系统的周期变化比广东地区的降水超前1—3天。 |
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| 基金项目:国家气象局热带气象科学基金资助项目 |
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| MEDIUM-RANGE OSCILLATIONS FOR THE INDOCHINA-BURMA TROUGH AND THE AUSTRALIAN COLD HIGH AND THEIR RELATIONSHIP WITH PRECIPITATION IN GUANGDONG IN THE SUMMER OF 1982 |
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Lin Lishan, Xie Lingjuan
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Guangdong Institute of Tropical and Oceanic
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| Abstract: |
| Using surface pressure,height and temperature data at 850 and 500 hPa.and rainfall records in Guangdong stations for July-September, 1982, power spectrum, cross spectrum, coagulation spectrum and correlation coefficient are derived in this paper.It shows that there is a quasi-3-week oscillation for the Indochina-Burma Trough and quasi-biweekly oscillation for the Australian Cold High and that their superimposed result is consistent with the quasi-biweekly and quasi-weekly oscillations for the precipitation in Guangdong.It is also shown that the periodic variations in the former two systems take place 1-3 days in advance of the ones in Guangdong precipitation. |
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