近50年黄河上游流域年均降水与极端降水变化分析

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英文篇名：Analysis of Annual Precipitation and Extreme Precipitation Change in the Upper Yellow River Basin in Recent 50 Years 作者：马佳宁 ; 高艳红 英文作者：MA Jianing;GAO Yanhong;Key laboratory of Land Surface Process and Climate in Cold and Arid Regions,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences;University of the Chinese Academy of Sciences; 关键词：黄河上游流域 ; 年均降水 ; 极端降水 ; 极端降水指数 ; 小波分析 英文关键词：The upper of the Yellow River Basin;;average annual precipitation;;extreme precipitation;;extreme precipitation index;;wavelet analysis 中文刊名：GYQX 英文刊名：Plateau Meteorology 机构：中国科学院西北生态环境资源研究院陆面过程与气候变化重点实验室;中国科学院大学; 出版日期：2019-02-28 出版单位：高原气象 年：2019 期：v.38 基金：国家重点研发计划项目(2017YFC1502101);; 国家自然科学基金项目(91537105) 语种：中文; 页：GYQX201901011 页数：12 CN：01 ISSN：62-1061/P 分类号：127-138

摘要

利用1970-2017年45个气象台站逐日降水资料分析了黄河上游流域降水空间分布规律以及年均降水和极端降水的变化趋势,将黄河上游流域按照地形地势、海拔、气候带分布等多种因素划分成源头区、产流区、出口区,并结合极端降水指数采用Mann-Kendall法、小波分析法分析了不同时间尺度下降水序列变化的周期和突变点,研究极端降水时空变化。结果表明,黄河上游流域年均降水从东南向西北扇形递减,源头区和产流区是年降水量的主要贡献区域;年均降水和极端降水均存在明显的周期振荡特征,其中源头区和产流区在22年左右,出口区在18年和8年左右;整个上游区域,极端降水和年均降水的变化趋势较为一致,但年降水量近年来呈现增长趋势,而极端降水事件的发生频率则有所降低。
        Greater attention has been received about the variation and trends in extreme climate events. Based on daily precipitation data recorded at 45 meteorological stations in the upper Yellow River Basin from 1970 to2017,the upper Yellow River Basin was distributed into three regions according to topography,elevation,climate and other factors. For each region,wavelet analysis and Mann-Kendall abrupt change analysis were employed to analyze the spatial distribution and temporal trends of annual precipitation and extreme precipitation events. The results showthat the distribution of average annual precipitation in the upper Yellow River Basin has obvious regional differences from the southeast to the northwest. The average annual precipitation and extreme precipitation in the upper Yellow River Basin had obvious periodic oscillation characteristics with 22 a mostly,followed by 18 a and 8 a. For the whole region,the extreme precipitation and average annual precipitation were more consistent,but the precipitation in the upper of the Yellow River Basin has been increasing in recent years,while the frequency of extreme precipitation events has been decreasing. It is implicated that the spatial pattern of climate in China has been changed during the past 48 years.

引文

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