| 重庆市伏旱频次气候特征分析 |
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| 引用本文： | 韩世刚,苟思,吉莉,陈欢. 重庆市伏旱频次气候特征分析[J]. 安徽农业科学, 2010, 38(29): 16372-16373,16428 |
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| 作者姓名： | 韩世刚 苟思 吉莉 陈欢 |
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| 作者单位： | 重庆市气象局,重庆,401147;兰州大学大气科学学院,甘肃兰州,73000 |
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| 摘 要： | 利用重庆市1960～2006年34个地面气象站逐日气象资料,采用Morlet小波分析方法分析了近47年来重庆市伏旱气候变化特征。结果表明,重庆伏旱天气有明显下降趋势;特重伏旱有＂先下降-后上升＂趋势,特别是从20世纪90年代开始上升趋势越来越明显。重庆市1995和2004年前后伏旱气候变化有明显的2～3年振荡周期;整个60年代,重庆市特重伏旱很稳定,没有明显的振荡变化。1970～1978年重庆市特重伏旱有明显的4～5年强振荡周期。
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| 关 键 词： | 伏旱 Morlet小波分析 Matlab 重庆 |
Analysis on Features of Chongqing Summer Drought Frequency |
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| HAN Shi-gang et al. Analysis on Features of Chongqing Summer Drought Frequency[J]. Journal of Anhui Agricultural Sciences, 2010, 38(29): 16372-16373,16428 |
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| Authors: | HAN Shi-gang et al |
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| Affiliation: | HAN Shi-gang et al(Chongqing Meteorological Administration,Chongqing 401147) |
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| Abstract: | By using the weather data of 34 meteorological observation stations in Chongqing from 1960 to 2006,the features of summer drought frequency were studied with Morlet technique.The results showed that there are a trend of decreasing with the total summer drought frequency and a trend of decreasing-increasing with the extreme serious summer drought frequency in Chongqing.There are a strong period of 2-3 years in 1995 and 2004 with the total summer drought frequency and a strong period of 4-5 years from 1970 to... |
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| Keywords: | Summer drought Morlet wavelet analysis Matlab Chongqing |
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