| 黄河中下游旱涝年的低频波振荡特征 |
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| 引用本文： | 何素兰,黄荣辉.黄河中下游旱涝年的低频波振荡特征[J].应用气象学报,1993,4(4):402-407. |
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| 作者姓名： | 何素兰 黄荣辉 |
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| 作者单位： | 1.国家气象中心 北京100081
(何素兰，宋连春)，中国科学院大气物理研究所 北京100080(黄荣辉) |
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| 摘 要： | 采用低通滤波和功率谱分析的方法，分析了黄河中下游地区旱、涝年500 hPa高度场的30—60天周期的低频振荡。从1986年和1988年的分析结果看出:在旱年的夏季，乌拉尔山地区的低频振荡周期短、谱值高；贝加尔湖地区的低频振荡周期长、谱值高；副热带地区的低频振荡周期短、谱值低。相反，在涝年的夏季，乌拉尔山地区、贝加尔湖地区和副热带地区的低频振荡具有与旱年相反的特征。
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| 关 键 词： | 低频振荡 功率谱 干旱 洪涝 |
The Low Frequency Oscillation Characteristics of Typical Drought/Flood in the Low and Middle Reaches of Huanghe River |
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| He Sulan Song Lianchun.The Low Frequency Oscillation Characteristics of Typical Drought/Flood in the Low and Middle Reaches of Huanghe River[J].Quarterly Journal of Applied Meteorology,1993,4(4):402-407. |
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| Authors: | He Sulan Song Lianchun |
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| Affiliation: | 1.1) (National Meteorological Center, Beijing 100081); 2) (Institute of Atmospheric Physics, Academia Sinica, Beijing 100080) |
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| Abstract: | The methods of band-pass filter and power spectrum are used to analyse atmospheric low frequency oscillation (LFO) (30—60 days) characteristics of 500hPa geopotential height field over the Northern Hemisphere in typical drought/flood year in the low and middle reaches of Huanghe River. The facts can be drawn as follows: The characteristics of LFO in summer drought appear that longer period and higher spectrum value occurred in Bejkal Lake region and shorter period and lower spectrum value in Ural, while the characteristics of LFO in flood year in Ural, Bajkal lake and subtropical regions are contrary to those in drought year |
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| Keywords: | LFO Power spectrum Drought Flood |
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