气候变化领域集成服务门户(CCPortal): Spatial variations in the difference in elevational shifts between greenness and temperature isolines across the Tibetan Plateau grasslands under warming

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DOI	10.1016/j.scitotenv.2023.167715
	Spatial variations in the difference in elevational shifts between greenness and temperature isolines across the Tibetan Plateau grasslands under warming
	Zhang, Lei; Shen, Miaogen; Yang, Zhiyong; Wang, Yafeng; Chen, Jin
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
卷号	906
英文摘要	Climate warming has induced widespread isotherm shifts toward higher elevations on the Tibetan Plateau, but elevational shifts of vegetation greenness (indicated by Normalized Difference Vegetation Index, NDVI) do not necessarily keep pace with the isotherm shifts. Thus, there should be spatial variations in the difference between the velocities of vertical movement of greenness isolines (VNDVI) and isotherms (VT) across the Tibetan Plateau grasslands. Using satellite-observed NDVI and gridded climate data during 2000-2017, we found uphill shifts of the isotherms in 81.8 % of the surveyed areas, mainly in the eastern, central, southwestern, and northeastern parts, whereas upward shifts of the greenness isolines were observed only in 49.7 % of these areas, mainly in the southeastern, west-central, and southwestern edge of Tibetan Plateau grasslands. In the areas where both the greenness isolines and isotherms shifted uphill, VDNVI was faster than VT in the west-central and northeastern parts, and VNDVI was smaller than VT in the western, south-central, central, and southeastern regions; the difference between VNDVI and VT was positively related with elevational gradient of NDVI (NDVIEG) in the areas where NDVIEG was negative and the temporal trend of NDVI was positive, and was negatively related with NDVIEG and temporal trends of NDVI and temperature in the areas where NDVIEG was positive and temporal trend of NDVI was negative. Our results revealed spatial heterogeneity in the difference in the elevational shifts between the isotherm and vegetation greenness isoline across the Tibetan Plateau grasslands, which is related with both diverse adaptation to local environment (NDVIEG) and complex responses of vegetation greenness to warming in terms of both direction and magnitude. These findings have important implications for the prediction of vegetation production and carbon cycle and the adaptive management of alpine grasslands under climate change.
关键词	Alpine grasslands Climate change Elevational movement Spatial variability Vegetation greenness
英文关键词	CLIMATE-CHANGE; VEGETATION PRODUCTIVITY; ABOVEGROUND BIOMASS; RESPONSES; PRECIPITATION; VELOCITY
WOS研究方向	Environmental Sciences
WOS记录号	WOS:001099975500001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283775
作者单位	Beijing Normal University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Institute of Tibetan Plateau Research, CAS
推荐引用方式 GB/T 7714	Zhang, Lei,Shen, Miaogen,Yang, Zhiyong,et al. Spatial variations in the difference in elevational shifts between greenness and temperature isolines across the Tibetan Plateau grasslands under warming[J]. 中国科学院青藏高原研究所,2024,906.
APA	Zhang, Lei,Shen, Miaogen,Yang, Zhiyong,Wang, Yafeng,&Chen, Jin.(2024).Spatial variations in the difference in elevational shifts between greenness and temperature isolines across the Tibetan Plateau grasslands under warming.SCIENCE OF THE TOTAL ENVIRONMENT,906.
MLA	Zhang, Lei,et al."Spatial variations in the difference in elevational shifts between greenness and temperature isolines across the Tibetan Plateau grasslands under warming".SCIENCE OF THE TOTAL ENVIRONMENT 906(2024).