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The Spatiotemporal Change in Land Cover and Discrepancies within Different Countries on the Qinghai-Tibet Plateau over a Recent 30-Year Period

文献类型：期刊论文

作者Chen, Yan1,2; Xu, Erqi1
刊名LAND
出版日期2023-09-01
卷号12期号:9页码:21
关键词Qinghai-Tibet Plateau climate change land cover change characteristics multi-country differences vegetation degradation
DOI10.3390/land12091797
通讯作者Xu, Erqi(xueq@igsnrr.ac.cn)
英文摘要The Qinghai-Tibet Plateau is a unique global natural geographical unit with a high altitude and fragile ecology, where land cover change has been affecting its regional ecological security and sustainable development. The plateau covers nine countries with different variations in climate change and human activities, which cause significant spatial variations in its land cover change. This paper uses land cover data to reveal the spatiotemporal characteristics and multi-country differences in land cover change on the Qinghai-Tibet Plateau from 1992 to 2020 by applying spatiotemporal characteristic analysis and mapping methods. The results show that grassland (65.70%), bare land (15.56%), and woodland (10.25%) are the main types of land cover on the plateau, accounting for 91.51% of the total area. The interconversion of bare land and grassland was dominant in 1992-2020, with an area share of 67.83%. The turning point year of grassland change occurred in 2015. The grassland area increased by 6312 km(2) in 1992-2015, while it decreased by 14,646 km(2) in the plateau in 2015-2020. The areas of woodland, cropland, and water increased by 2.77%, 5.85%, and 7.57%, respectively, and the area of built-up land increased from 299.17 km(2) to 1206.29 km(2). Overall, a warming and wetting trend of the climate in the Qinghai-Tibet Plateau has driven the expansion of natural vegetation and water in the central plateau within China, with its natural vegetation area increasing by 0.11%. However, the development of regional warming and drying caused local grassland degradation, where Kyrgyzstan and India within the Qinghai-Tibet Plateau experienced the most prominent vegetation degradation. Human activities are relatively frequent in the Qinghai-Tibet Plateau within China and India, causing higher growth rates of built-up land and cropland than in other countries. The establishment of reserves and effective forest management policies have led to significant increases in woodland areas in China and Nepal within the plateau, while weak forest management and limited investment in forest conservation have led to high rates of deforestation in India and Myanmar. Accelerated temperature rises and regional differences in precipitation are the main drivers of large-scale land cover change on the plateau and differences in human activities and land use policies are responsible for the dramatic and diverse localized land cover change.
WOS关键词CLIMATE-CHANGE ; CHINA ; WATER
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23100403] ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0603] ; National Natural Science Foundation of China[42271277] ; National Natural Science Foundation of China[72221002] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[2021052]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001146103600001
出版者MDPI
资助机构Strategic Priority Research Program of the Chinese Academy of Sciences ; Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/202402]  
专题中国科学院地理科学与资源研究所
通讯作者Xu, Erqi
作者单位1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Yan,Xu, Erqi. The Spatiotemporal Change in Land Cover and Discrepancies within Different Countries on the Qinghai-Tibet Plateau over a Recent 30-Year Period[J]. LAND,2023,12(9):21.
APA Chen, Yan,&Xu, Erqi.(2023).The Spatiotemporal Change in Land Cover and Discrepancies within Different Countries on the Qinghai-Tibet Plateau over a Recent 30-Year Period.LAND,12(9),21.
MLA Chen, Yan,et al."The Spatiotemporal Change in Land Cover and Discrepancies within Different Countries on the Qinghai-Tibet Plateau over a Recent 30-Year Period".LAND 12.9(2023):21.

入库方式： OAI收割

来源：地理科学与资源研究所

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