气候变化领域集成服务门户(CCPortal): Hillslope-Scale Variability in Seasonal Frost Depth and Soil Water Content Investigated by GPR on the Southern Margin of the Sporadic Permafrost Zone on the Tibetan Plateau

CCPortal

DOI	10.1002/ppp.1844
	Hillslope-Scale Variability in Seasonal Frost Depth and Soil Water Content Investigated by GPR on the Southern Margin of the Sporadic Permafrost Zone on the Tibetan Plateau
	Ma, Yingzhao; Zhang, Yinsheng; Zubrzycki, Sebastian; Guo, Yanhong; Bin Farhan, Suhaib
通讯作者	Ma, YZ (通讯作者)
发表日期	2015
ISSN	1045-6740
EISSN	1099-1530
起始页码	321
结束页码	334
卷号	26 期号:4
英文摘要	Ground temperature data show that permafrost has recently been absent at a site on the southern edge of the sporadic permafrost zone on the Tibetan Plateau (TP). A detailed survey of seasonal frost depth (SFD) and soil water content (SWC) here is significant for understanding the hydrological response to thawing permafrost. However, little is known about the spatial heterogeneity of SFD and SWC at the hillslope scale in this vulnerable permafrost region. Thus, high-frequency ground-penetrating radar (GPR) was applied to a field site that varied in terms of topography (slope, aspect and elevation) and surface environments (vegetation cover and stream presence). The GPR data and accompanying field observations of gravimetric water content and frost depth revealed a spatial variation at the hillslope scale in SFD and SWC, and indicated that topography, vegetation and stream distribution significantly influence the patterns observed. The average SFD was much deeper along the north-facing slope, compared to the south-facing slope in early May, and its thickness varied considerably with altitude along each slope. An increase in the extent of vegetation cover correlated with decreasing SFD. The SWC at shallow depth was higher along the south-facing slope than along the north-facing slope at the beginning of the thawing period. For slopes of both aspects, the SWC vertical profiles exhibited a similar variability, with SWC decreasing with depth, but at different rates. This study demonstrates that GPR provides an appropriate method for quantifying SWC at the hillslope scale on the TP. Copyright (C) 2015 JohnWiley & Sons, Ltd.
关键词	GROUND-PENETRATING RADAR ACTIVE LAYER DEGRADATION DYNAMICS FEATURES BARROW
英文关键词	hillslope; spatial variability; seasonal frost depth; soil water content; GPR; Tibetan Plateau
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geology
WOS记录号	WOS:000368431200003
来源期刊	PERMAFROST AND PERIGLACIAL PROCESSES
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/258463
推荐引用方式 GB/T 7714	Ma, Yingzhao,Zhang, Yinsheng,Zubrzycki, Sebastian,et al. Hillslope-Scale Variability in Seasonal Frost Depth and Soil Water Content Investigated by GPR on the Southern Margin of the Sporadic Permafrost Zone on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2015,26(4).
APA	Ma, Yingzhao,Zhang, Yinsheng,Zubrzycki, Sebastian,Guo, Yanhong,&Bin Farhan, Suhaib.(2015).Hillslope-Scale Variability in Seasonal Frost Depth and Soil Water Content Investigated by GPR on the Southern Margin of the Sporadic Permafrost Zone on the Tibetan Plateau.PERMAFROST AND PERIGLACIAL PROCESSES,26(4).
MLA	Ma, Yingzhao,et al."Hillslope-Scale Variability in Seasonal Frost Depth and Soil Water Content Investigated by GPR on the Southern Margin of the Sporadic Permafrost Zone on the Tibetan Plateau".PERMAFROST AND PERIGLACIAL PROCESSES 26.4(2015).