| 咸阳市近54a汛期降水特征分析 |
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| 引用本文： | 王英,牛乐田,刘帆,胡国玲.咸阳市近54a汛期降水特征分析[J].咸阳师范专科学校学报,2014(6):50-55. |
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| 作者姓名： | 王英 牛乐田 刘帆 胡国玲 |
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| 作者单位： | 咸阳市气象局,陕西咸阳712000 |
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| 摘 要： | 利用1960—2013年咸阳地区12县（区）月降水资料,采用线性回归法和Morlet小波分析方法,分析了近54 a咸阳市汛期（5—10月）降水的变化特征。结果表明近54 a来咸阳市汛期降水线性趋势变化不明显,但前汛期、主汛期降水总体呈上升趋势,秋汛期降水量总体呈下降趋势。近54 a咸阳市汛期降水年代际变化的主要周期为25 a,20世纪60年代到70年代中后期主要周期是7 a,70年代后期至2010年8 a周期显著。60年代中期和90年代中期主要周期为准4a。
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| 关 键 词： | 汛期降水 线性倾向估计 小波分析 |
An Analysis of the Characteristics of Precipitation for the Past Fifty-Four Years in Xianyang City |
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| WANG Ying,NIU Le-tian,LIU Fan,HU Guo-ling.An Analysis of the Characteristics of Precipitation for the Past Fifty-Four Years in Xianyang City[J].Journal of Xianyang Teachers College,2014(6):50-55. |
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| Authors: | WANG Ying NIU Le-tian LIU Fan HU Guo-ling |
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| Institution: | (Xianyang Municipal Meteorological Bureau, Xianyang 712000, Shaanxi, China) |
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| Abstract: | An analysis is made of the variation characteristics of precipitation during the flood season（May to October） for the past fifty-four years in Xianyang City by means of the precipitation data in the twelve counties（districts） in Xianyang area from 1960 to 2013 as well as the linear recursive approach and Morlet Wavelet Analytical Approach. The result shows that there is an inconspicuous variation tendency in terms of the precipitation during the flood season in Xianyang City for the past fifty-four years. However, the previous section and the main section of the flood season witnessed a general rising tendency in terms of precipitation. The precipitation during the autumnal rainy period witnessed a declining tendency. The main cycle of the decade variation of precipitation during the flood season is twenty-five years, whereas the main cycle of the 1960 s and the middle and late 1970 s is seven years, the remarkable main cycle of the late 1970 s to 2010 eight years, and the main cycle of the mid-1960 s and mid-1990 s is approximately four years. |
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| Keywords: | precipitation during the flood season estimation of linear tendency wavelet analysis |
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