| 30—50天低频振荡和准双周振荡对持续异常的影响 |
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| 引用本文： | 孙永罡,陈久康.30—50天低频振荡和准双周振荡对持续异常的影响[J].南京气象学院学报,1992,15(3):368-376. |
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| 作者姓名： | 孙永罡 陈久康 |
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| 作者单位： | 黑龙江省气象台
(孙永罡)，南京气象学院(陈久康) |
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| 基金项目： | 75-09-01经费资助 |
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| 摘 要： |
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| 关 键 词： | 持续异常 低频振荡 准双周振荡 |
THE INFLUENCE OF 30-50 DAY LOW-FREQUENCY FLUCTUATION AND QUASI-14 DAY FLUCTUATION ON THE PERSISTENT ANOMALIES |
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| Sun Yonggang,Chen Jiukang Meteorological Observatory of Heilongjiang Province Nanjing Institute of Meteorology.THE INFLUENCE OF 30-50 DAY LOW-FREQUENCY FLUCTUATION AND QUASI-14 DAY FLUCTUATION ON THE PERSISTENT ANOMALIES[J].Journal of Nanjing Institute of Meteorology,1992,15(3):368-376. |
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| Authors: | Sun Yonggang Chen Jiukang Meteorological Observatory of Heilongjiang Province Nanjing Institute of Meteorology |
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| Institution: | Sun Yonggang;Chen Jiukang Meteorological Observatory of Heilongjiang Province Nanjing Institute of Meteorology |
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| Abstract: | Using the data of the 500 hPa pentad anomaly of 14 winters (1971-1984) inthe Northern Hemisphere,the geographical distribution of the general circulation anoma-lies in the Northern winter is analysed. The effects of the 30-50 day low-frequencyfluctuation and quasi-14 day fluctuation on the persistent anomalies in their evolutionare studied. Results show that the time scale of the persistent anomalies is mainly associ-ated with the 30-50 day low-freqency fluctuation. It is found that Alaska is the keyregion of not only the persistent anomalies but also the 30-50 day low-frequency fluc-tuation. The persistent circulation anomalies and weather-climate anomalies are chieflydominated by the 30-50 day low-frequency fluctuation. |
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| Keywords: | persistent anomaly 30--50 day low--frequency fluctuation quasi--14 day fluctuation |
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