气候变化领域集成服务门户(CCPortal): Vegetation disturbances characterization in the Tibetan Plateau from 1986 to 2018 using Landsat time series and field observations

CCPortal

DOI	10.1088/1748-9326/acab1b
	Vegetation disturbances characterization in the Tibetan Plateau from 1986 to 2018 using Landsat time series and field observations
	Wang, Yanyu; Ma, Ziqiang; He, Yuhong; Yu, Wu; Chang, Jinfeng; Peng, Dailiang; Min, Xiaoxiao; Guo, Hancheng; Xiao, Yi; Gao, Lingfang; Shi, Zhou
发表日期	2023
ISSN	1748-9326
卷号	18 期号:1
英文摘要	Disturbances in vegetated land could dramatically affect the process of vegetation growth and reshape the land cover state. The overall greenup of vegetation on the Tibetan Plateau (TP) has almost served as a consensus to date. However, we still lack consistent acquisitions on the timing, the spatial patterns, and the temporal frequency of vegetation disturbance over the TP, limiting the capacity for planning land management strategies. Therefore, we explored the spatiotemporal pattern and variation of vegetation disturbances across the TP during the past decades and analyzed the disturbance agents. We utilized 37-year Landsat time series images and field observations coupled with a temporal segmentation approach to characterize the spatiotemporal pattern of vegetation disturbances across the TP for the period 1986-2018. The results from this study revealed that 75.71 M ha (accounting for 29.34% of TP's area) vegetation area underwent at least one disturbance, of which 8.44 M ha area ever experienced large-scale disturbances (disturbance area greater than 0.9 ha and disturbance magnitude (the difference between the spectral value of pre-disturbance and that of post-disturbance) over 0.2). Further, the spatial distributions of these large-scale disturbances varied over time: before 2002, the disturbed sites were evenly distributed over the southeast part of the TP probably induced by overgrazing and unscientific livestock management, while after 2002, most disturbances were concentrated in the south of the Yarlung Tsangpo, mainly caused by anthropogenic activities, such as urban area, roadways, railway, and water control projects. This study presents an effort to characterize vegetation disturbances and their variations over the past decades on the TP, which provides crucial insights toward a complete understanding of vegetation dynamics and its causal relationship with human activities.
关键词	disturbance vegetation change detection time series Landsat Tibetan Plateau
英文关键词	FOREST DISTURBANCE; CLIMATE-CHANGE; WILDFIRE DISTURBANCE; DETECTING TRENDS; RECOVERY; IMAGES; AREA; TERRESTRIAL; LANDTRENDR; GRASSLANDS
WOS研究方向	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000911758600001
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283911
作者单位	Zhejiang University; Peking University; University of Toronto; University Toronto Mississauga; Tibet University; Chinese Academy of Sciences; Chinese Academy of Sciences; Institute of Soil Science, CAS
推荐引用方式 GB/T 7714	Wang, Yanyu,Ma, Ziqiang,He, Yuhong,et al. Vegetation disturbances characterization in the Tibetan Plateau from 1986 to 2018 using Landsat time series and field observations[J],2023,18(1).
APA	Wang, Yanyu.,Ma, Ziqiang.,He, Yuhong.,Yu, Wu.,Chang, Jinfeng.,...&Shi, Zhou.(2023).Vegetation disturbances characterization in the Tibetan Plateau from 1986 to 2018 using Landsat time series and field observations.ENVIRONMENTAL RESEARCH LETTERS,18(1).
MLA	Wang, Yanyu,et al."Vegetation disturbances characterization in the Tibetan Plateau from 1986 to 2018 using Landsat time series and field observations".ENVIRONMENTAL RESEARCH LETTERS 18.1(2023).