Drought variability and its connection with large-scale atmospheric circulations in Haihe River Basin  

作　　者：Jia Wei Wei-guang Wang Yin Huang Yi-min Ding Jian-yu Fu Ze-feng Chen Wan-qiu Xing 

机构地区：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University,Nanjing 210098,China [2]College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China [3]China Water Resources Beifang Investigation,Design and Research Co.,Ltd.,Tianjin 300222,China

出　　处：《Water Science and Engineering》2021年第1期1-16,共16页水科学与水工程（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grants No.51979071,51779073,and 51809073);the Jiangsu Provincial Natural Science Fund for Distinguished Young Scholars(Grant No.BK20180021);the National Ten Thousand Talent Program for Young Top-Notch Talents,and the Six Talent Peaks Project of Jiangsu Province.

摘　　要：Drought is one of the most widespread and devastating extreme climate events when water availability is significantly below normal levels for a long period.In recent years,the Haihe River Basin has been threatened by intensified droughts.Therefore,characterization of droughts in the basin is of great importance for sustainable water resources management.In this study,two multi-scalar drought indices,the standardized precipitation evapotranspiration index(SPEI)with potential evapotranspiration calculated by the PenmaneMonteith equation and the standardized precipitation index(SPI),were used to evaluate the spatiotemporal variations of drought characteristics from 1961 to 2017 in the Haihe River Basin.In addition,the large-scale atmospheric circulation patterns were used to further explore the potential links between drought trends and climatic anomalies.An increasing tendency in drought duration was detected over the Haihe River Basin with frequent drought events occurring in the period from 1997 to 2003.The results derived from both SPEI and SPI demonstrated that summer droughts were significantly intensified.The analysis of large-scale atmospheric circulation patterns indicated that the intensified summer droughts could be attributed to the positive geopotential height anomalies in Asian mid-high latitudes and the insufficient water vapor fluxes transported from the south.©2021 Hohai University.Production and hosting by Elsevier B.V.This is an open access article under the CC BY-NC-ND license(http://creativecommons.org/licenses/by-nc-nd/4.0/).

关 键 词：DROUGHT Standardized precipitation index Standardized precipitation evapotranspiration index Large-scale atmospheric circulation 

分 类 号：P426.616[天文地球—大气科学及气象学]