| 小波分析法在内蒙古寒旱区降水量特征研究中的应用 |
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| 引用本文： | 邹春霞,申向东,李夏子,邹存菁.小波分析法在内蒙古寒旱区降水量特征研究中的应用[J].干旱区资源与环境,2012(4):113-116. |
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| 作者姓名： | 邹春霞 申向东 李夏子 邹存菁 |
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| 作者单位： | 内蒙古农业大学水利与土木建筑工程学院;内蒙古农业大学生态环境学院;内蒙古河套灌区永济管理局 |
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| 基金项目： | 国家自然科学基金(10262001);科技部重大基础前期研究专项(2002ccc03400);内蒙古高等学校科学研究项目(NJzy08044);内蒙古农业大学博士科研启动项目(BJ07-27)资助 |
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| 摘 要： | 区域降水量不但是影响土壤风蚀的一个重要因素,同时还对植被及农牧业发展起着决定性的作用。以内蒙古寒旱区降水量为研究对象,在收集多年气象站观测数据的基础上,引入MHF小波函数,对其时间序列进行小波分析。揭示了区域降水量变化的多时间尺度的复杂结构,分析了其在不同时间尺度下的周期性和突变诊断点。研究表明:内蒙古寒旱区降水具有明显的季节性和阶段性特征,以1年和9年的周期振动最强;在整个时间域上,降水量呈减小趋势。
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| 关 键 词： | 降水 MHF小波 多时间尺度 寒旱区 |
Application of wavelet method on analysis of precipitation characteristics in dry-cold areas,Inner Mongolia,China |
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| ZOU Chunxia,SHEN Xiangdong,LI Xiazi,ZOU Cunjing.Application of wavelet method on analysis of precipitation characteristics in dry-cold areas,Inner Mongolia,China[J].Journal of Arid Land Resources and Environment,2012(4):113-116. |
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| Authors: | ZOU Chunxia SHEN Xiangdong LI Xiazi ZOU Cunjing |
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| Institution: | 1.College of Water Conservancy and Civil Engineering,Inner Mongolia Agricultural University,Hohhot 010018,P.R.China;2.College of Ecology and Environmental Science,Inner Mongolia Agricultural University,Hohhot 010018,P.R.China;3.Yongji Bureau of Hetao Irrigation Region,Bayannaoer,Inner Mongolia 015000,P.R.China) |
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| Abstract: | The study focused on the precipitation time series of past long years in dry-cold areas,Inner Mongolia,China,which is one of important factors influencing on wind erosion,vegetations,agricultural development.The MHF wavelet method was adopted to analyze the temporal-frequency multi-time scale variations and jump features of dust storm activities,which can reveal the multi-scale characteristics of dust storm.Consequently,the periods and turning points of precipitation in different time-scale were revealed.Meanwhile,the trend of rainfall in the following years was forecasted.The results showed that the precipitation showed obvious staggered features in dry-cold areas,Inner Mongolia,China.It was also found that approximate 1-year and 9-year period-oscillation was the strongest.In final the wavelet coefficients patterns exhibited a probablely decreasing trend in the following years. |
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| Keywords: | precipitation MHF wavelet method multi-time scale dry-cold areas |
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