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Vegetation Changes along the Qinghai-Tibet Plateau Engineering Corridor Since 2000 Induced by Climate Change and Human Activities
Song, Yi1; Jin, Long2; Wang, Haibo3
2018
Source PublicationREMOTE SENSING
Volume10Issue:1
SubtypeArticle
AbstractThe Qinghai-Tibet (QT) Plateau Engineering Corridor is located in the hinterland of the QT Plateau, which is highly sensitive to global climate change. Climate change causes permafrost degradation, which subsequently affects vegetation growth. This study focused on the vegetation dynamics and their relationships with climate change and human activities in the region surrounding the QT Plateau Engineering Corridor. The vegetation changes were inferred by applying trend analysis, the Mann-Kendall trend test and abrupt change analysis. Six key regions, each containing 40 nested quadrats that ranged in size from 500 x 500 m to 20 x 20 km, were selected to determine the spatial scales of the impacts from different factors. Cumulative growing season integrated enhanced vegetation index (CGSIEVI) values were calculated for each of the nested quadrats of different sizes to indicate the overall vegetation state over the entire year at different spatial scales. The impacts from human activities, a sudden increase in precipitation and permafrost degradation were quantified at different spatial scales using the CGSIEVI values and meteorological data based on the double mass curve method. Three conclusions were derived. First, the vegetation displayed a significant increasing trend over 23.6% of the study area. The areas displaying increases were mainly distributed in the Hoh Xil. Of the area where the vegetation displayed a significant decreasing trend, 72.4% was made up of alpine meadows. Second, more vegetation, especially the alpine meadows, has begun to degenerate or experience more rapid degradation since 2007 due to permafrost degradation and overgrazing. Finally, an active layer depth of 3 m to 3.2 m represents a limiting depth for alpine meadows.
KeywordPermafrost Degradation Human Activities Vegetation Change Scale Effect Qinghai-tibet Plateau Engineering Corridor
WOS HeadingsScience & Technology ; Technology
DOI10.3390/rs10010095
WOS KeywordPERMAFROST CHANGES ; CHINA ; DYNAMICS ; DESERTIFICATION ; VARIABILITY ; ECOSYSTEMS ; PARAMETERS ; QUALITY ; MODEL ; SCALE
Indexed BySCI
Language英语
WOS Research AreaRemote Sensing
WOS SubjectRemote Sensing
WOS IDWOS:000424092300094
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5184
Collection生态环境研究室
Affiliation1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China
2.CCCC First Highway Consultants Co Ltd, Minist Transport, Key Lab Highway Construct & Maintenance Technol P, Xian 710065, Shaanxi, Peoples R China
3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Song, Yi,Jin, Long,Wang, Haibo. Vegetation Changes along the Qinghai-Tibet Plateau Engineering Corridor Since 2000 Induced by Climate Change and Human Activities[J]. REMOTE SENSING,2018,10(1).
APA Song, Yi,Jin, Long,&Wang, Haibo.(2018).Vegetation Changes along the Qinghai-Tibet Plateau Engineering Corridor Since 2000 Induced by Climate Change and Human Activities.REMOTE SENSING,10(1).
MLA Song, Yi,et al."Vegetation Changes along the Qinghai-Tibet Plateau Engineering Corridor Since 2000 Induced by Climate Change and Human Activities".REMOTE SENSING 10.1(2018).
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