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Effects of extreme drought events on vegetation activity from the perspectives of meteorological and soil droughts in southwestern China

文献类型：期刊论文

作者Huang, Fengxian1; Liu, Lulu; Gao, Jiangbo3,6; Yin, Ziying5; Zhang, Yibo1; Jiang, Yuan1; Zuo, Liyuan1; Fang, Wenguo2
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2023-12-10
卷号903页码:166562
ISSN号0048-9697
关键词Extreme drought event Vegetation activity Common land model Southwestern China
DOI10.1016/j.scitotenv.2023.166562
产权排序1
文献子类Article
英文摘要Under climate warming, extreme drought events (EDEs) in southwestern China have become more frequent and severe and have had significant impacts on vegetation growth. Clarifying the influence of soil and meteorological droughts on the vegetation photosynthetic rate (PHR) and respiration rate (RER) can help policymakers to anticipate the impacts of drought on vegetation and take measures to reduce losses. In this study, the frequency and features of EDEs from 1990 to 2021 were analyzed using the standardized precipitation evapotranspiration index, and the longest-lasting and most severe EDE was chosen to assess the effects of drought on vegetation activity. Then, a land surface model was used to simulate the vegetation PHR and RER. Finally, the effects of the EDE on the vegetation PHR and RER were analyzed from the perspectives of soil and meteorological droughts. The results revealed that from 1990 to 2021, a total of 11 EDEs were observed in southwestern China, and the longest-lasting and most severe EDE occurred in 2009-2010 (EDE2009/2010). EDE2009/2010 significantly reduced the monthly mean PHR and RER by 9.82 g C m- 2 month-1 and 0.80 g C m- 2 month-1, respectively, causing a cumulative reduction of approximately 5.61 x 1013 g C. Soil and meteorological droughts had a driving force of 39 % on the PHR changes and an explanatory force of 42 % on the RER reduction. In particular, the soil drought had an average explanatory force of 25 % on the PHR and made a contribution of 24 % to the RER. The drought affected different types of vegetation differently, and crops were more susceptible than grassland and forests on the monthly time scale. The vegetation exhibited resilience to drought, returning to normal PHR and RER levels 2 months after the end of EDE2009/2010. This research contributes to understanding and predicting the impact of EDEs on vegetation growth in southwestern China.
学科主题Environmental Sciences & Ecology
WOS关键词EVAPOTRANSPIRATION INDEX SPEI ; MODEL STRUCTURE ; CARBON-CYCLE ; IMPACT ; TEMPERATURE ; PHOTOSYNTHESIS ; EVAPORATION ; CLIMATE ; TRANSPIRATION ; UNCERTAINTY
WOS研究方向Environmental Sciences & Ecology
出版者ELSEVIER
WOS记录号WOS:001069587700001
源URL[http://ir.igsnrr.ac.cn/handle/311030/197880]  
专题陆地表层格局与模拟院重点实验室_外文论文
作者单位1.Qinghai Normal Univ, Peoples Govt Qinghai Prov & Beijing Normal Univ, Acad Plateau Sci & Sustainabil, Xining 810008, Peoples R China
2.China Univ Geosci Beijing, Beijing 100083, Peoples R China
3.Qinghai Normal Univ, Sch Geog Sci, Xining 810016, Peoples R China
4.11A Datun Rd, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
6.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Huang, Fengxian,Liu, Lulu,Gao, Jiangbo,et al. Effects of extreme drought events on vegetation activity from the perspectives of meteorological and soil droughts in southwestern China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,903:166562.
APA Huang, Fengxian.,Liu, Lulu.,Gao, Jiangbo.,Yin, Ziying.,Zhang, Yibo.,...&Fang, Wenguo.(2023).Effects of extreme drought events on vegetation activity from the perspectives of meteorological and soil droughts in southwestern China.SCIENCE OF THE TOTAL ENVIRONMENT,903,166562.
MLA Huang, Fengxian,et al."Effects of extreme drought events on vegetation activity from the perspectives of meteorological and soil droughts in southwestern China".SCIENCE OF THE TOTAL ENVIRONMENT 903(2023):166562.

入库方式： OAI收割

来源：地理科学与资源研究所

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