Spatio-temporal variations in trends of vegetation and drought changes in relation to climate variability from 1982 to 2019 based on remote sensing data from East Asia

作     者：Shahzad ALI Abdul BASIT Muhammad UMAIR Tyan Alice MAKANDA Fahim Ullah KHAN Siqi SHI NI Jian Shahzad ALI;Abdul BASIT;Muhammad UMAIR;Tyan Alice MAKANDA;Fahim Ullah KHAN;Siqi SHI;NI Jian

作者机构：College of Chemistry and Life SciencesZhejiang Normal UniversityJinhua 321004P.R.China Department of AgricultureHazara UniversityMansehra 21120Pakistan Department of Computer ScienceUniversity of PeshawarPeshawar 25000Pakistan Faculty of Geo-Information Science and Earth Observation(ITC)University of TwenteEnschede 7500 AENetherlands 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2023年第22卷第10期

页      面：3193-3208页

核心收录：

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：the Basic Research Project of Zhejiang Normal University,China(ZC304022952) the China Postdoctoral Science Foundation Funding(2018M642614) the Natural Science Foundation Youth Proj ect of S h andong Provi nce,C hina(ZR2020QF281) 

主　　题：climate change drought severity vegetation dynamics heat mapping TVDI spatial correlation East Asia 

摘      要：Studying the significant impacts on vegetation of drought due to global warming is crucial in order to understand its dynamics and interrelationships with temperature,rainfall,and normalized difference vegetation index(NDVI).These factors are linked to excesses drought frequency and severity on the regional scale,and their effect on vegetation remains an important topic for climate change *** Asia is very sensitive and susceptible to climate *** this study,we examined the effect of drought on the seasonal variations of vegetation in relation to climate variability and determined which growing seasons are most vulnerable to drought risk;and then explored the spatio-temporal evolution of the trend in drought changes in East Asia from 1982 to *** data were studied using a series of several drought indexes,and the data were then classified using a heat map,box and whisker plot analysis,and principal component *** various drought indexes from January to August improved rapidly,except for vegetation health index(VHI)and temperature condition index(TCI).While these indices were constant in September,they increased again in October,but in December,they showed a descending *** seasonal and monthly analysis of the drought indexes and the heat map confirmed that the East Asian region suffered from extreme droughts in 1984,1993,2007,and 2012among the study *** distribution of the trend in drought changes indicated that more severe drought occurred in the northwestern region than in the southeastern area of East *** drought tendency slope was used to describe the changes in drought events during 1982–2019 in the study *** correlations among monthly precipitation anomaly percentage(NAP),NDVI,TCI,vegetation condition index(VCI),temperature vegetation drought index(TVDI),and VHI indicated considerably positive correlations,while considerably negative correlations were found among the three pairs of NDVI and VHI,TVDI and VHI,and NDV