| ENSO事件对中高纬大气低频振荡的调频作用 |
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| 引用本文： | 邱明宇,陆维松,陶丽.ENSO事件对中高纬大气低频振荡的调频作用[J].南京气象学院学报,2004,27(3):365-373. |
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| 作者姓名： | 邱明宇 陆维松 陶丽 |
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| 作者单位： | 南京气象学院,大气科学系,江苏,南京,210044 |
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| 基金项目： | 国家自然科学基金资助项目(40275016),江苏省"六大人才高峰"行动计划基金资助项目 |
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| 摘 要： | 采用诊断方法研究了El Nino和La Nina事件对中高纬大气低频振荡的调频作用。应用1950—1996年北半球中高纬逐日500 hPa高度场资料进行功率谱分析得出：夏季低频振荡较弱,冬季低频振荡较强;El Nino事件有使低频振荡周期缩短的趋势,La Nina事件有使低频振荡周期延长的趋势。
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| 关 键 词： | 调频作用 低频振荡 功率谱分析 ENSO |
| 文章编号： | 1000-2022(2004)03-0365-09 |
Frequency Modulation Effect of ENSO Events on Atmospheric Low-frequency Oscillations in the Extra-tropical Latitudes |
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| QIU Ming-yu,LU Wei-song,TAO Li.Frequency Modulation Effect of ENSO Events on Atmospheric Low-frequency Oscillations in the Extra-tropical Latitudes[J].Journal of Nanjing Institute of Meteorology,2004,27(3):365-373. |
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| Authors: | QIU Ming-yu LU Wei-song TAO Li |
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| Abstract: | A diagnostic analysis is carried out to investigate the frequency modulation effect of El Nino and La Nina events on atmospheric low-frequency oscillations(LFO) in the mid-high latitudes.The power spectral analysis is performed for the daily Northern 500hPa height field data in the mid-high latitudes from 1950 to 1996.The results show that:(1) the intensity of low-frequency oscillation in winter is stronger than that in summer;(2)main periods of low-frequency oscillations show a shortening/lengthening tendency of low-frequency oscillation period during El Nino/La Nina event.The above results have the significant meaning to the research of the short-term climatic variation. |
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| Keywords: | frequency modulation low-frequency oscillation power spectral analysis ENSO |
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