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Dynamic response of vegetation to meteorological drought and driving mechanisms in Mongolian Plateau

文献类型：期刊论文

作者Gao, Shenghang11; Huang, Shengzhi10,11; Singh, Vijay P.6,8,9; Deng, Xiaoya5; Duan, Limin3,4,7; Leng, Guoyong2; Guo, Wenwen11; Li, Yifei11; Zhang, Lin11; Han, Zhiming1
刊名JOURNAL OF HYDROLOGY
出版日期2025-04-01
卷号650页码:14
关键词Drought SPEI NDVI Trigger threshold Threshold dynamics Meteorological
ISSN号0022-1694
DOI10.1016/j.jhydrol.2024.132541
通讯作者Huang, Shengzhi(huangshengzhi7788@126.com)
英文摘要Due to the complex response of vegetation growth to meteorological drought, it is necessary to quantify the meteorological drought threshold triggering vegetation loss. However, the dynamic change of the trigger threshold under changing environment and its driving mechanism are not clear. Therefore, this study proposed a research framework of meteorological drought trigger threshold under different vegetation (NDVI) loss conditions based on copula theory and conditional probability, and explored the possible causes of spatiotemporal changes of meteorological drought (SPEI) threshold triggering vegetation loss based on CatBoost model. The findings revealed that:(1) the proportion of quick response time (1-6 months) of vegetation to meteorological drought increased gradually in the Mongolian Plateau (MP) from May to September, and reached the peak in September (77 %); (2) the trend in the overall MP from May to September showed a decrease in trigger thresholds, and the ratio of the grids exhibiting significantly decreased trigger thresholds to those with significantly increased trigger thresholds was greater than 1 for each month, with July having the smallest ratio; (3) the spatial pattern of trigger threshold was mainly attributed to soil moisture (SM), and the proportion of dominant grids at four vegetation loss levels was 20 %, 16 %, 19 % and 15 %, respectively, while the temporal variations of the thresholds from June to September were mainly attributable to water use efficiency (WUE), and that in May were mainly attributable to potential evapotranspiration (PET) and temperature (TMP). These findings will help to improve our understanding of the terrestrial ecosystem vulnerability and their response to meteorological drought, providing valuable insights for crafting timely and effective strategies to safeguard ecosystem health and mitigate the adverse impacts of drought.
WOS关键词WATER AVAILABILITY ; IMPACT
资助项目National Key R & D Program of China[2022YFC3202300] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA28060100] ; National Natural Science Foundation of China[52279026]
WOS研究方向Engineering ; Geology ; Water Resources
语种英语
WOS记录号WOS:001392232200001
出版者ELSEVIER
资助机构National Key R & D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/212536]  
专题中国科学院地理科学与资源研究所
通讯作者Huang, Shengzhi
作者单位1.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.Collaborat Innovat Ctr Integrated Management Water, Hohhot 010018, Peoples R China
4.Inner Mongolia Agr Univ, Water Conservancy & Civil Engn Coll, Hohhot 010018, Peoples R China
5.China Inst Water Resources & Hydropower Res, State Key Lab Simulat & Regulat Water Cycle River, Beijing 100038, Peoples R China
6.UAE Univ, Natl Water & Energy Ctr, Al Ain, U Arab Emirates
7.Inner Mongolia Key Lab Ecohydrol & High Efficient, Hohhot 010018, Peoples R China
8.Texas A&M Univ, Zachry Dept Civil & Environm Engn, College Stn, TX 77843 USA
9.Texas A&M Univ, Dept Biol & Agr Engn, College Stn, TX 77843 USA
10.North China Univ Water Resources & Elect Power, Sch Water Conservancy, Zhengzhou 450046, Peoples R China
推荐引用方式
GB/T 7714		 Gao, Shenghang,Huang, Shengzhi,Singh, Vijay P.,et al. Dynamic response of vegetation to meteorological drought and driving mechanisms in Mongolian Plateau[J]. JOURNAL OF HYDROLOGY,2025,650:14.
APA Gao, Shenghang.,Huang, Shengzhi.,Singh, Vijay P..,Deng, Xiaoya.,Duan, Limin.,...&Huang, Qiang.(2025).Dynamic response of vegetation to meteorological drought and driving mechanisms in Mongolian Plateau.JOURNAL OF HYDROLOGY,650,14.
MLA Gao, Shenghang,et al."Dynamic response of vegetation to meteorological drought and driving mechanisms in Mongolian Plateau".JOURNAL OF HYDROLOGY 650(2025):14.

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来源：地理科学与资源研究所

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