| 基于Z指数的河北省旱涝多尺度变化特征 |
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| 引用本文： | 王宏,余锦华,李宗涛,周贺玲.基于Z指数的河北省旱涝多尺度变化特征[J].辽宁气象,2012(1):43-47. |
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| 作者姓名： | 王宏 余锦华 李宗涛 周贺玲 |
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| 作者单位： | [1]南京信息工程大学大气科学学院,江苏南京210044 [2]承德市气象局,河北承德067000 [3]河北省气象局,河北石家庄050021 [4]廊坊市气象局,河北廊坊065000 |
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| 基金项目： | 公益性（气象）行业科研专项（GYHY200906016）项目资助 |
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| 摘 要： | 利用1961—2009年京、津、冀73个气象站降水资料,计算降水Z指数,采用趋势分析、小波分析等方法,对河北省旱涝特征进行了分析。结果表明：近49 a来,河北省年降水Z指数呈下降趋势,并存在多时间尺度变化特征,具有7、9 a和15 a尺度的周期。夏季降水Z指数呈下降趋势,存在15 a显著的变化周期;冬、春季和秋季的降水Z指数均呈上升趋势,10—11 a的周期震荡明显。
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| 关 键 词： | 降水Z指数 多时间尺度 小波分析 河北省 |
Multi-time scale characteristics of drought and flood based on Z index in Hebei province |
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| WANG Hong,YU Jin-hua LI Zong-tao ZHOU He-ling.Multi-time scale characteristics of drought and flood based on Z index in Hebei province[J].Liaoning Meteorological Quarterly,2012(1):43-47. |
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| Authors: | WANG Hong YU Jin-hua LI Zong-tao ZHOU He-ling |
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| Affiliation: | 1.School of Atmospheric Science,Nanjing University of Information Science and Technology,Nanjing 210044, China;2.Chengde Meteorological Service,Chengde 067000,China;3.Hebei Meteorological Service, Shijiazhuang 050021,China;4.Langfang Meteorological Service,Langfang 065000,China) |
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| Abstract: | Based on the precipitation data from 73 weather stations in Beijing,Tianjin and Hebei province from 1961 to 2009,the characteristics of drought and flood were analyzed with methods of a trend analysis and a wavelet analysis.The results indicate that Z index of the annual precipitation is in a decreasing trend in recent 49 years and there exists multi-time scale characteristics.The cycles are 7years,9 years and 15 years.Z index of summer precipitation is also in a decreasing trend and its cycle is 15 years,while Z indices of other seasons are in increasing trends and the significant cycles are 10-11 years. |
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| Keywords: | Z index of precipitation Multi-time scale Wavelet analysis Hebei province |
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