首页|Antecedent snowmelt and orographic precipitation contributions to water supply of Pakistan disastrous floods,2022

Antecedent snowmelt and orographic precipitation contributions to water supply of Pakistan disastrous floods,2022

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
In 2022,the Pakistan witnessed the hottest spring and wettest summer in history.And devastating floods inundated a large portion of Pakistan and caused enormous damages.However,the primary water source and its contributions to these unprecedented floods remain unclear.Based on the reservoir inflow measurements,Multi-Source Weighted-Ensemble Precipitation(MSWEP),the fifth generation ECMWF atmospheric reanalysis(ERA5)products,this study quantified the contributions of monsoon precipitation,antecedent snow-melts,and orographic precipitation enhancement to floods in Pakistan.We found that the Indus experienced at least four inflow up-rushes,which was mainly supplied by precipitation and snowmelt;In upper Indus,abnormally high temperature continued to influence the whole summer and lead to large amounts of snowmelts which not only was a key water supply to the flood but also provided favorable soil moisture conditions for the latter precipitation.Before July,the snowmelt has higher contributions than the precipitation to the streamflow of Indus River,with contribution value of more than 60％.Moreover,the snowmelt could still supply 20％-40％water to the lower Indus in July and August;The leading driver of 2022 mega-floods over the southern Pakistan in July and August was dominated by the precipitation,where terrain disturbance induced precipitation account to approximately 33％over the southern Pakistan.The results help to understand the mechanisms of flood formation,and to better predict future flood risks over complex terrain regions.

Extreme heavy rainfallSnowmeltOrographic precipitationFloodsPakistan

Yan WANG、Peng CUI、Chen-Di ZHANG、Guo-Tao ZHANG、Jian-Sheng HAO、Xu YUAN、Yao-Zhi JIANG、Lu WANG

展开 >

Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China

Key Laboratory of Mountain Hazards and Earth Surface Process,Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610299,China

Polar and Marine Research Institute,College of Harbor and Coastal Engineering,Jimei University,Xiamen 361021,China

School of Resources and Environment,University of Electronic Science and Technology of China,Chengdu 610054,China

Hebei Province Tangshan Caofeidian Meteorological Bureau,Tangshan 063000,China

展开 >

Second Tibet Plateau Scientific Expedition and Research Program(STEP)Second Tibet Plateau Scientific Expedition and Research Program(STEP)National Science Foundation of China

2019Q-ZKK0903-022019QZKK090642371085

2024

10.1016/j.accre.2023.12.002

气候变化研究进展(英文版)
国家气候中心

气候变化研究进展(英文版)

影响因子：0.806
ISSN：1674-9278
年,卷(期)：2024.15(3)