[1]刘江涛,等.1973-2016年雅鲁藏布江流域极端降水事件时空变化特征[J].山地学报,2018,(05):750-764.[doi:10.16089/j.cnki.1008-2786.000371]
 LIU Jiangtao,XU Zongxue,et al.Spatiotemporal Variation of Extreme Precipitation Events in the Yarlung Zangbo River Basin from 1973 to 2016, China[J].Mountain Research,2018,(05):750-764.[doi:10.16089/j.cnki.1008-2786.000371]
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1973-2016年雅鲁藏布江流域极端降水事件时空变化特征()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2018年05期
页码:
750-764
栏目:
山地灾害
出版日期:
2018-11-30

文章信息/Info

Title:
Spatiotemporal Variation of Extreme Precipitation Events in the Yarlung Zangbo River Basin from 1973 to 2016, China
文章编号:
1008-2786-(2018)5-750-15
作者:
刘江涛1 2徐宗学12 *赵 焕1 2彭定志1 2张 瑞1 2
1.北京师范大学 水科学研究院 北京 100875; 2.城市水循环与海绵城市技术北京市重点实验室 北京 100875
Author(s):
LIU Jiangtao1 2 XU Zongxue1 2* ZHAO Huan1 2 PENG Dingzhi1 2 ZHANG Rui1 2
1.College of Water Sciences, Beijing Normal University, Beijing 100875, China; 2.Beijing Key Laboratory of Urban Hydrological Cycle and Sponge City Technology, Beijing 100875, China
关键词:
雅鲁藏布江 极端降水 印度洋偶极子 时空变化
分类号:
X43; P333.2
DOI:
10.16089/j.cnki.1008-2786.000371
文献标志码:
A
摘要:
随着全球气候的改变,由极端降水事件所引发的干旱、洪涝、泥石流等自然灾害,引起了社会各界的广泛关注。本文基于雅鲁藏布江流域19个气象站点1973-2016年的逐日降水数据,使用线性倾向估计法、Mann-Kendall非参数统计检验法和皮尔森相关系数法,分析了雅鲁藏布江流域极端降水事件的时空变化特征及其与印度洋偶极子指数(DMI)的相关性。结果表明:(1)1973-2016年间,雅鲁藏布江流域极端降水指标整体上呈现出上升趋势,与流域内年平均降水量变化趋势相一致,其中降水日数(RD)、降水总量(PRCPTOT)、极端降水量(R95p)、连续湿润日数(CWD)指标均在95%信度水平上显著上升。RD、 CWD极端降水指标分别在1995年左右、2001年左右发生了突变;(2)雅鲁藏布江流域的极端降水指标在空间上存在明显的差异性,表现出从东部到西部逐渐递减的分布特征。极端降水指标在雅鲁藏布江流域的空间分布特征表明,近年来,东部湿润地区暴雨事件可能更加频繁,洪涝灾害更加严重,西部地区则从相对干旱逐渐变得相对湿润;(3)对极端降水指标进行主成分分析,PRCPTOT和CWD指标的载荷在主成分1和主成分2中分别占0.94、0.71,表明可以用它们分别代表极端降水事件的降水量级和降水持续性;(4)1-3月份的极端降水事件更容易受到印度洋偶极子(IOD)的影响,在雅鲁藏布江流域中部地区,2月份的DMI与PRCPTOT、CWD呈现出正相关关系,相关系数分别达到0.412和0.356,是易受DMI影响的主要地区。雅鲁藏布江流域在250 hPa和500 hPa的位势高度差值均存在负值中心,有利于极端降水事件的发生。研究结果为雅鲁藏布江流域水资源管理和灾害防治提供科学基础。

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备注/Memo

备注/Memo:
收稿日期(Received date):2018-02-28; 改回日期(Accepted date): 2018-08-27
基金项目(Foundation item):国家自然科学基金重大研究计划重点支持资助项目(91647202)。 [National Natural Science Foundation of China, Major Program(91647202)]
作者简介(Biography):刘江涛(1991-),男,河南商丘人,硕士研究生,主要研究方向:水文与水资源。 [LIU Jiangtao(1991-), male, born in Shangqiu, Henan province, M.Sc.candidate, research on hydrology and water resource] E-mail: liujiangtao@mail.bnu.edu.cn
*通讯作者(Corresponding author):徐宗学(1962-),男,博士,教授,主要研究方向:水文与水资源。 [XU Zongxue(1962–), male, Ph.D., professor, specialized in hydrology and water resource]
更新日期/Last Update: 2018-11-30