Spatio-Temporal Characteristics of Drought Events and Their Effects on Vegetation: A Case Study in Southern Tibet, China
文献类型：期刊论文
| 作者 | Ye, Zu-Xin1,3,4; Cheng, Wei-Ming3 ; Zhao, Zhi-Qi5; Guo, Jian-Yang1; Yang, Ze-Xian2; Wang, Rui-Bo3; Wang, Nan3,4
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| 刊名 | REMOTE SENSING
 |
| 出版日期 | 2020-12-01 |
| 卷号 | 12期号:24页码:24 |
| 关键词 | drought space– time characteristic single event multiple events vegetation southern Tibet |
| DOI | 10.3390/rs12244174 |
| 通讯作者 | Zhao, Zhi-Qi(zhaozhiqi@chd.edu.cn) |
| 英文摘要 | Frequent droughts in a warming climate tend to induce the degeneration of vegetation. Quantifying the response of vegetation to variations in drought events is therefore crucial for evaluating the potential impacts of climate change on ecosystems. In this study, the standardized precipitation index (SPI) was calculated using the precipitation data sourced from the China Meteorological Forcing Dataset (CMFD), and then the drought events in southern Tibet from 1982 to 2015 were identified based on the SPI index. The results showed that the frequency, severity, and intensity of drought events in southern Tibet decreased from 1982 to 2015, and the highest frequency of drought was found between 1993 and 2000. To evaluate the impact of drought events on vegetation, the vegetation characteristic indexes were developed based on the normalized difference vegetation index (NDVI) and the drought characteristics. The assessment of two drought events showed that the alpine grasslands and alpine meadows had high vegetation vulnerability (AI). The assessment of multiple drought events showed that responses of vegetation to drought were spatially heterogeneous, and the total explain rate of environmental factors to the variations in AI accounted for 40%. Among the many environmental factors investigated, the AI were higher at middle altitudes (2000-3000 m) than low altitudes (<2000 m) and high altitudes (3000-4500 m). Meanwhile, the silt soil fraction in the upper soil layer (0-30 cm) had the greatest positive correlation with AI, suggesting that areas with a high silt soil fraction were more sensitive to drought. The relative contribution rates of environmental factors were predicted by a multivariate linear regression (MLR) model. The silt soil fraction was found to make the greatest relative contribution (23.3%) to the changes in AI. |
| WOS关键词 | METEOROLOGICAL DROUGHT ; SPECTRAL REFLECTANCE ; USE EFFICIENCY ; CLIMATE-CHANGE ; TIME-SCALES ; RIVER-BASIN ; WATER ; PRECIPITATION ; PRODUCTIVITY ; PLATEAU |
| 资助项目 | Natural Science Foundation of China[41930863] ; Natural Science Foundation of China[41661144042] ; Natural Science Foundation of China[41673124] ; Science and Technology Project of Xizang Autonomous Region[XZ201901-GA-07] ; Second Tibetan Plateau Scientific Expedition and Research[2019QZKK0707] ; Special Fund for Basic Scientific Research of Central Colleges, Chang'an University[3001102278302] |
| WOS研究方向 | Environmental Sciences & Ecology ; Remote Sensing |
| 语种 | 英语 |
| WOS记录号 | WOS:000603222500001 |
| 出版者 | MDPI |
| 资助机构 | Natural Science Foundation of China ; Science and Technology Project of Xizang Autonomous Region ; Second Tibetan Plateau Scientific Expedition and Research ; Special Fund for Basic Scientific Research of Central Colleges, Chang'an University |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/137357]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zhao, Zhi-Qi |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China 2.SanJiang Univ, Sch Elect & Informat Engn, Nanjing 210012, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 5.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ye, Zu-Xin,Cheng, Wei-Ming,Zhao, Zhi-Qi,et al. Spatio-Temporal Characteristics of Drought Events and Their Effects on Vegetation: A Case Study in Southern Tibet, China[J]. REMOTE SENSING,2020,12(24):24. |
| APA | Ye, Zu-Xin.,Cheng, Wei-Ming.,Zhao, Zhi-Qi.,Guo, Jian-Yang.,Yang, Ze-Xian.,...&Wang, Nan.(2020).Spatio-Temporal Characteristics of Drought Events and Their Effects on Vegetation: A Case Study in Southern Tibet, China.REMOTE SENSING,12(24),24. |
| MLA | Ye, Zu-Xin,et al."Spatio-Temporal Characteristics of Drought Events and Their Effects on Vegetation: A Case Study in Southern Tibet, China".REMOTE SENSING 12.24(2020):24. |
入库方式： OAI收割
来源：地理科学与资源研究所
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