Changes in the depths of seasonal freezing and thawing and their effects on vegetation in the Three-River Headwater Region of the Tibetan Plateau

doi:10.1007/s11629-019-5450-7

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2019 > Vol16 No.12

	Changes in the depths of seasonal freezing and thawing and their effects on vegetation in the Three-River Headwater Region of the Tibetan Plateau
	Wang Rui; Dong Zhi-bao; Zhou Zheng-chao
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:12 页码:2810-2827
关键词	Frozen soil depth Active layer thickness Alpine vegetation Climate warming Three Rivers Source Region
ISSN号	1672-6316
DOI	10.1007/s11629-019-5450-7
文献子类	Article
英文摘要	Frozen ground degradation plays an important role in vegetation growth and activity in high-altitude cold regions. This study estimated the spatiotemporal variations in the active layer thickness (ALT) of the permafrost region and the soil freeze depth (SFD) in the seasonally frozen ground region across the Three Rivers Source Region (TRSR) from 1980 to 2014 using the Stefan equation, and differentiated the effects of these variations on alpine vegetation in these two regions. The results showed that the average ALT from 1980 to 2014 increased by 23.01 cm/10a, while the average SFD decreased by 3.41 cm/10a, and both changed intensively in the transitional zone between the seasonally frozen ground and permafrost. From 1982-2014, the increase in the normalized difference vegetation index (NDVI) and the advancement of the start of the vegetation growing season (SOS) in the seasonally frozen ground region (0.0078/10a, 1.83d/10a) were greater than those in the permafrost region (0.0057/10a, 0.39d/10a). The results of the correlation analysis indicated that increases in the ALT and decreases in the SFD in the TRSR could lead to increases in the NDVI and advancement of the SOS. Surface soil moisture played a critical role in vegetation growth in association with the increasing ALT and decreasing SFD. The NDVI for all vegetation types in the TRSR except for alpine vegetation showed an increasing trend that was significantly related to the SFD and ALT. During the study period, the general frozen ground conditions were favorable to vegetation growth, while the average contributions of ALT and SFD to the interannual variation in the NDVI were greater than that of precipitation but less than that of temperature.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000502451800009
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46633]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.12
推荐引用方式 GB/T 7714	Wang Rui,Dong Zhi-bao,Zhou Zheng-chao. Changes in the depths of seasonal freezing and thawing and their effects on vegetation in the Three-River Headwater Region of the Tibetan Plateau[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(12):2810-2827.
APA	Wang Rui,Dong Zhi-bao,&Zhou Zheng-chao.(2019).Changes in the depths of seasonal freezing and thawing and their effects on vegetation in the Three-River Headwater Region of the Tibetan Plateau.JOURNAL OF MOUNTAIN SCIENCE,16(12),2810-2827.
MLA	Wang Rui,et al."Changes in the depths of seasonal freezing and thawing and their effects on vegetation in the Three-River Headwater Region of the Tibetan Plateau".JOURNAL OF MOUNTAIN SCIENCE 16.12(2019):2810-2827.