Factors Affecting Long-Term Trends in Global NDVI | |
Yujie Yang; Shijie Wang; Xiaoyong Bai; Qiu Tan; Qin Li; Luhua Wu; Shiqi Tian; Zeyin Hu; Chaojun Li; Yuanhong Deng | |
2019 | |
发表期刊 | Forests |
卷号 | 10期号:5页码:1-17 |
摘要 | Diagnosing the evolution trends of vegetation and its drivers is necessary for ecological conservation and restoration. However, it remains unclear what the underlying distribution pattern of these trends and its correlation with some drivers at large spatial-temporal scales. Here we use the normalized difference vegetation index (NDVI) to quantify the activity of vegetation by Theil-Sen median trend analysis and the Mann-Kendall test, Pearson correlation analysis and Boosted regression trees (BRT) model. Results show that about 34% of the global continent area has experienced greening in the grid annual NDVI from 1982 to 2015. The major greening areas were observed in the Sahel, European, India and south China. Only 10% of the global continent land areas were browning, and these were observed in Canada, South America, central Africa and Central Asia. BRT model shows that rainfall is the most important factor affecting vegetation evolution (63.1%), followed by temperature (15%), land cover change (8.6%), population (6.5%), elevation (6.4%) and nightlight (0.4%). It's about 21% of the world's continent were affected by rainfall, mainly in arid regions such as central Asia and Australia. The main temperature-affected areas accounted for 36%, located near the equator or in high latitudes. |
关键词 | Ndvi Theil-sen Median Mann-kendall Test Trends Correlation Analysis Boosted Regression Trees |
收录类别 | SCI |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.gyig.ac.cn/handle/42920512-1/10220 |
专题 | 环境地球化学国家重点实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, 99 Lincheng West Rd, Guiyang 550081, Guizhou, Peoples R China 2.Guizhou Normal Univ, Sch Geog & Environm Sci, Guiyang 550081, Guizhou, Peoples R China 3.Chinese Acad Sci, Puding Karst Ecosyst Observat & Res Stn, Puding 562100, Peoples R China |
推荐引用方式 GB/T 7714 | Yujie Yang;Shijie Wang;Xiaoyong Bai;Qiu Tan;Qin Li;Luhua Wu;Shiqi Tian;Zeyin Hu;Chaojun Li;Yuanhong Deng. Factors Affecting Long-Term Trends in Global NDVI[J]. Forests,2019,10(5):1-17. |
APA | Yujie Yang;Shijie Wang;Xiaoyong Bai;Qiu Tan;Qin Li;Luhua Wu;Shiqi Tian;Zeyin Hu;Chaojun Li;Yuanhong Deng.(2019).Factors Affecting Long-Term Trends in Global NDVI.Forests,10(5),1-17. |
MLA | Yujie Yang;Shijie Wang;Xiaoyong Bai;Qiu Tan;Qin Li;Luhua Wu;Shiqi Tian;Zeyin Hu;Chaojun Li;Yuanhong Deng."Factors Affecting Long-Term Trends in Global NDVI".Forests 10.5(2019):1-17. |
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