| 近50a葫芦河流域气候变化特征 |
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| 引用本文： | 聂中青,贾冰,丁贞玉,马金珠.近50a葫芦河流域气候变化特征[J].兰州大学学报(自然科学版),2009,45(2). |
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| 作者姓名： | 聂中青 贾冰 丁贞玉 马金珠 |
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| 作者单位： | 兰州大学资源环境学院,兰州,730000 |
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| 基金项目： | 新世纪优秀人才支持计划项目(NCET)和西部交通建设科技项目 |
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| 摘 要： | 根据静宁、秦安两站的水文气象资料,分析了葫芦河流域近50a气候变化特征.采用Mann-Kendall法分析,结果显示近50a气温总体呈上升趋势,降水量呈下降走向.利用Meyer小波及Morlet小波分别分析并相互检验校正葫芦河流域年均气温及年降水量的主要变化周期,其中:年平均气温普遍存在30a以上,22,12~14,10a左右的中长周期以及4～7,2～3a的短周期,而年降水量存在30a以上,20,12~14,10a左右的中长周期以及6～8,2～4a的短周期.近50a葫芦河流域河川径流的变化主要受当地降水波动的影响.
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| 关 键 词： | 气候变化 Mann-Kendall法 小波分析 葫芦河流域 |
Characteristics of climate changes in Hulu River basin since recent 50 years |
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| NIE Zhong-qing,JIA Bing,DING Zhen-yu,MA Jin-zhu.Characteristics of climate changes in Hulu River basin since recent 50 years[J].Journal of Lanzhou University(Natural Science),2009,45(2). |
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| Authors: | NIE Zhong-qing JIA Bing DING Zhen-yu MA Jin-zhu |
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| Affiliation: | School of Resources and Environmental Sciences;Lanzhou University;Lanzhou 730000;China |
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| Abstract: | Based on the data of air temperature and precipitation from the meteorological stations in Jingning and Qin'an,the Mann-Kendall method is applied to the tendency characteristics of climate changes of the recent 50 years in Hulu River basin,which show that the general variance of annual mean air temperature is increasing and annual total precipitation is declining.The results of the Meyer and Morlet wavelet analysis show that there are multi-scaled period changes for annual air temperature and precipitation,... |
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| Keywords: | climate change Mann-Kendall method wavelet analysis Hulu River basin |
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