气候变化领域集成服务门户(CCPortal): Spatial variations in ground surface temperature at various scales on the northeastern Qinghai-Tibet Plateau, China

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DOI	10.1016/j.catena.2022.106811
	Spatial variations in ground surface temperature at various scales on the northeastern Qinghai-Tibet Plateau, China
	Serban, Raul-David; Bertoldi, Giacomo; Jin, Huijun; Serban, Mihaela; Luo, Dongliang; Li, Xinze
发表日期	2023
ISSN	0341-8162
EISSN	1872-6887
卷号	222
英文摘要	Ground surface temperature (GST, depth of 5 cm) is essential for understanding the climate-induced impacts in the Earth Critical Zone, especially in cold regions. This work aims to detect the GST variability from fine (2 to 16 m) to local and landscape scales (2 and 50 km2) and along an 800-m elevational transect. The study area is located in the southern part of the Headwater Area of the Yellow River (HAYR), a representative area of discontinuous alpine permafrost on northeastern Qinghai-Tibet Plateau. From 2019 to 2020, GST was recorded at 39 sites under similar and varied environmental conditions. A statistically significant correlation was identified between mean annual GST (MAGST) with landcover (0.37, p < 0.05) and elevation (- 0.76, p < 0.001). The analysis of variance (ANOVA) showed significant differences in MAGST between sites on bare ground and with vegetation. At the local/landscape scales, MAGSTs in meadows (-0.6 to 0.6 degrees C) were higher than those in swamp meadows (-1.4 to 0.7 degrees C) and bare grounds (-2.0, - 1.2 degrees C). At the fine scale, GST revealed a high similarity between plots (R2 > 0.95 for 90 % of the sites) but with an RMSE ranging from 0.25 to 1.5 degrees C. The intra-plot difference in MAGST was below 0.5 degrees C for sites with similar landcover in both plots and up to 1-2 degrees C when vegetation was compared to the bare ground. The decrease of MAGST with rising elevation was more pronounced for the sites in bare ground (R2 = 0.83, p < 0.001) than vegetated ones (e.g., meadow: R2 = 0.64, p < 0.003). These results help identify the patterns of permafrost distribution and thaw at a high spatial resolution and better understand their relationship with vegetation development, soil organic carbon, and the rapid landscape changes in the HAYR.
关键词	Permafrost Landcover Ground surface temperature (GST)Climate change
英文关键词	PENINSULA LIVINGSTON ISLAND; YELLOW-RIVER; PERMAFROST DISTRIBUTION; MOUNTAIN PERMAFROST; SOIL-TEMPERATURE; THERMAL REGIME; ENVIRONMENTAL CONTROLS; SNOW COVER; CLIMATE; VARIABILITY
WOS研究方向	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000927058500001
来源期刊	CATENA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283216
作者单位	European Academy of Bozen-Bolzano; Chinese Academy of Sciences; Northeast Forestry University - China; Northeast Forestry University - China; Shaoxing University; West University of Timisoara; China University of Petroleum
推荐引用方式 GB/T 7714	Serban, Raul-David,Bertoldi, Giacomo,Jin, Huijun,et al. Spatial variations in ground surface temperature at various scales on the northeastern Qinghai-Tibet Plateau, China[J],2023,222.
APA	Serban, Raul-David,Bertoldi, Giacomo,Jin, Huijun,Serban, Mihaela,Luo, Dongliang,&Li, Xinze.(2023).Spatial variations in ground surface temperature at various scales on the northeastern Qinghai-Tibet Plateau, China.CATENA,222.
MLA	Serban, Raul-David,et al."Spatial variations in ground surface temperature at various scales on the northeastern Qinghai-Tibet Plateau, China".CATENA 222(2023).