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首页> 外文期刊>The Science of the Total Environment >Comprehensive assessment of drought risk in the arid region of Northwest China based on the global palmer drought severity index gridded data
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Comprehensive assessment of drought risk in the arid region of Northwest China based on the global palmer drought severity index gridded data

机译：基于全球帕尔默干旱严重性指数网格数据的西北干旱区干旱风险综合评价

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摘要

Droughts are extremely widespread natural disasters, which cause the most severe losses among natural disasters. The comprehensive drought risk in Northwest China (NWC) was evaluated based on the self-calibrating (SC) Palmer Drought Severity Index (PDSI) and copula method. The major conclusions are the following: (1) based on the rotated empirical orthogonal function (REOF), a significant consistency in the spatial distribution of the monthly averaged SC-PDSI was observed in NWC, especially in the subregions Inner Mongolia Plateau (IM), Hexi Corridor (HX), and Qiangtang Plateau (QT); (2) the largest frequency was obtained for slight drought and slight wet conditions, while extreme drought and extreme wet showed the lowest values; (3) with respect to the PDSI-th, the Clayton, Arch12, Arch12, Arch12, Arch12, and Frank played the major roles in the copula weight in the subregions IM, HX, Qinghai River Basin (QH), QT, North Xinjiang (NXJ), and South Xinjiang (SXJ), respectively. In terms of PDSI-pm, Arch12, Clayton, Gaussian, Arch12, Clayton, and Clayton dominated the weights of multi-copula functions in the regions IM, HX, QH, QT, NXJ, and SXJ, respectively; and (4) the frequency and probability of droughts in each area differed. The least drought events occurred in the QT and the most emerged in the HX for SC-PDSI.
机译：干旱是极为普遍的自然灾害，造成自然灾害中最严重的损失。基于自校准（SC）帕尔默干旱严重度指数（PDSI）和copula方法，评估了中国西北地区（NWC）的综合干旱风险。主要结论如下：（1）基于旋转经验正交函数（REOF），在西北太平洋，特别是在内蒙古高原（IM）的子区域，观测到的月平均SC-PDSI的空间分布具有显着一致性。 ，河西走廊（HX）和Qian塘高原（QT）； （2）在轻度干旱和轻度潮湿条件下获得最大频率，而极度干旱和极度潮湿则显示最低值。 （3）就PDSI-th而言，Clayton，Arch12，Arch12，Arch12，Arch12和Frank在次区域IM，HX，青海河流域（QH），QT，新疆北部的copula重量中起主要作用。 （NXJ）和南疆（SXJ）。就PDSI-pm而言，Arch12，Clayton，Gaussian，Arch12，Clayton和Clayton分别主导了IM，HX，QH，QT，NXJ和SXJ区域中的多系函数的权重； （4）每个地区的干旱发生频率和可能性不同。 SC-PDSI发生在QT的干旱事件最少，发生在HX的最多。

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  • 来源
    《The Science of the Total Environment》 |2018年第15期|951-962|共12页
  • 作者

    Peng Yang; Jun Xia; Yongyong Zhang; Chesheng Zhan; Yunfeng Qiao;

  • 作者单位

    Key Laboratory of Water Cycle & Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences,University of Chinese Academy of Sciences;

    Key Laboratory of Water Cycle & Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences,State Key Laboratory of Water Resources & Hydropower Engineering Sciences, Wuhan University;

    Key Laboratory of Water Cycle & Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences;

    Key Laboratory of Water Cycle & Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences;

    University of Chinese Academy of Sciences,Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    drought duration; drought severity; probability; copula; REOF; NWC;

    机译：干旱持续时间;干旱严重程度;概率;系;REOF;NWC;

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