Drought trigger thresholds for different levels of vegetation loss in China and their dynamics
文献类型：期刊论文
| 作者 | Guo, Wenwen; Huang, Shengzhi; Huang, Qiang; Leng, Guoyong4; Mu, Zhenxia2; Han, Zhiming; Wei, Xiaoting; She, Dunxian3; Wang, Hanye; Wang, Zhixia |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2023-03-15 |
| 卷号 | 331页码:109349 |
| 关键词 | Drought SPEI GPP Trigger threshold Threshold dynamics |
| DOI | 10.1016/j.agrformet.2023.109349 |
| 文献子类 | Article |
| 英文摘要 | Frequent meteorological droughts can negatively impact terrestrial ecosystems by controlling the opening and closing of vegetation stomatal and altering vegetation structure to limit the ability of vegetation to sequester carbon. Due to the lagging and accumulation effects of drought on vegetation growth, drought trigger thresholds for different levels of vegetation loss are still unclear, which is very important for accurately assessing the future impacts of drought on terrestrial ecosystem. Therefore, this study proposed a framework to investigate drought trigger thresholds under various vegetation losses based on copula theory and conditional probabilities, and assessed the dynamics of drought trigger thresholds and possible causes, based on the random forest model. In addition, we used multiple GPP and soil water datasets for the analysis to ensure the robustness of relevant findings. The results show that: (1) there is a generally positive correlation between GPP and SPEI in China, and the response time of vegetation to drought is mostly on a short time scale (less than or equal to 4 months); (2) drought trigger thresholds are also higher in eastern China, with lower vegetation resistance and significantly higher risk of vegetation productivity loss than in other regions; (3) the trigger thresholds in northeastern China show a decreasing trend, with vegetation resistance gradually increasing. CO2 fertilization enhances vegetation drought resistance, but the magnitude of resistance increase is reduced due to the adverse effects of water stress and VPD on vegetation. The findings of this study may advance our comprehension of terrestrial ecosystem vulnerability and response to drought, and further provide scientific guidance for watershed water allocation, drought |
| WOS关键词 | NET PRIMARY PRODUCTIVITY ; CLIMATE EXTREMES ; TREE MORTALITY ; SOIL-MOISTURE ; CARBON ; TEMPERATURE ; FORESTS ; IMPACT ; MODEL ; ECOSYSTEMS |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| WOS记录号 | WOS:000964168700001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/200824]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 作者单位 | 1.Wuhan Univ, State Key Lab Water Resources & Hydropower Engn Sc, Wuhan 430072, 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.Xinjiang Key Lab Hydraul Engn Secur & Water Disast, Urumqi 830052, Xinjiang, Peoples R China 4.Xian Univ Technol, State Key Lab Eco Hydraul Northwest Arid Reg China, Xian 710048, Peoples R China 5.Univ Leipzig, Remote Sensing Ctr Earth Syst Res, D-04103 Leipzig, Germany 6.UFZ Helmholtz Ctr Environm Res, Dept Remote Sensing, Permoserstr 15, D-04318 Leipzig, Germany |
| 推荐引用方式 GB/T 7714 | Guo, Wenwen,Huang, Shengzhi,Huang, Qiang,et al. Drought trigger thresholds for different levels of vegetation loss in China and their dynamics[J]. AGRICULTURAL AND FOREST METEOROLOGY,2023,331:109349. |
| APA | Guo, Wenwen.,Huang, Shengzhi.,Huang, Qiang.,Leng, Guoyong.,Mu, Zhenxia.,...&Peng, Jian.(2023).Drought trigger thresholds for different levels of vegetation loss in China and their dynamics.AGRICULTURAL AND FOREST METEOROLOGY,331,109349. |
| MLA | Guo, Wenwen,et al."Drought trigger thresholds for different levels of vegetation loss in China and their dynamics".AGRICULTURAL AND FOREST METEOROLOGY 331(2023):109349. |
入库方式： OAI收割
来源：地理科学与资源研究所
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