| 陕南降水变化时空差异分析 |
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| 引用本文： | 李小燕.陕南降水变化时空差异分析[J].陕西理工学院学报(自然科学版),2012,28(5):74-78. |
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| 作者姓名： | 李小燕 |
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| 作者单位： | 陕西理工学院 汉水文化研究中心,历史文化与旅游学院,陕西汉中723000 |
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| 基金项目： | 国家社会科学基金资助项目(11BJY031);陕西省教育厅科研基金资助项目(11JK0748);陕西(高校)哲学社会科学重点研究基地“汉水文化研究中心”计划项目(SLGH1245);陕西省重点实验室项目(2010JS072);宝鸡文理学院重点项目(ZK1054) |
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| 摘 要： | 陕南地处南水北调中线工程水源地,降水量变化对该区域以及调水工程和受水区影响深刻.利用陕南及周边气象站点近30年的降水资料,运用经验正交函数法,分析获得陕南降水变化的空间分布特征和时间系数.结果表明:(1)陕南降水变化的特点主要表现出南北差异、东西差异和相对一致性的特点；(2)陕南降水变化的时间系数表现出明显的年内变化.
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| 关 键 词： | 经验正交函数 陕南 降水 时空差异 |
Research on temporal and spatial distribution of precipitation changes in southern Shaanxi |
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| LI Xiao-yan.Research on temporal and spatial distribution of precipitation changes in southern Shaanxi[J].Journal of Shananxi University of Technology:Natural Science Edition,2012,28(5):74-78. |
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| Authors: | LI Xiao-yan |
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| Institution: | LI Xiao-yan(Center of Hanshui Culture Studies,School of History and Tourism,Shaanxi University of Technology, Hanzhong 723000,China) |
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| Abstract: | Southern Shaanxi is located in the source of water area of the middle route project of South-to-North water diversion.The precipitation would influence this district,the water transfer project and the intake area.Using the precipitation data within almost 30 years from the meteorological agencies of Southern Shaanxi and the surrounding area,we calculated and decomposed the data using the method of empirical orthogonal function(EOF).We analyzed the feature vector distribution of precipitation.The results showed that:(1) precipitation changes of in southern Shaanxi present the feature of differences between the south and the north,differences between the east and the west,and relative uniformity;(2) The time-coefficient series of precipitation changes of in southern Shaanxi has a significant inter-annual variation,and the fluctuation continues to grow stronger during the year. |
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| Keywords: | empirical orthogonal function(EOF) southern Shaanxi precipitation temporal and spatial distribution |
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