Surface deformation detected by ALOS PALSAR small baseline SAR interferometry over permafrost environment of Beiluhe section, Tibet Plateau, China
Surface deformation detected by ALOS PALSAR small baseline SAR interferometry over permafrost environment of Beiluhe section, Tibet Plateau, China
复制标题
ALOS PALSAR小基线SAR干涉测量青藏高原北麓河地段多年冻土环境地表形变
DOI：
10.1016/j.rse.2013.07.006
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发表时间：
2013-11-01
影响因子：
13.5
通讯作者：
Wang, Gang
中科院分区：
文献类型：
--
作者：
Chen, Fulong;Lin, Hui;Wang, Gang
多年冻土和活动层的演变与生物多样性和气候变化密切相关，因为它涉及到水和碳储存的反馈效应。在这项研究中，我们首先研究了活动层的变化，地貌过程和人类活动的小基线合成孔径雷达干涉测量手段在北麓河可可西里自然保护区（TP），中国西藏高原（TP）。使用L波段ALOS PALSAR数据3.5年观测跨度（2007年6月至2010年12月）。估计的地表位移（主要在20 mm yr（-1）至20 mm yr（-1）的范围内）和时间序列暗示了活动层和冻土下的演变。由于地貌过程的影响，沿着坡的运动趋势较为复杂，因此需要进行跨学科的解释。青藏铁路路基沿着出现了明显的地表沉降现象，表明人类活动对这一脆弱的多年冻土环境的影响是显著的。由于与气候变化、地质灾害预测、自然保护和区域可持续发展有关的综合因素所产生的后果，对这一冻土高原进行监测是至关重要和必要的。(C)版权所有© 2013 Elsevier Inc.
The evolution of permafrost and the active layer is highly related to biological diversity and climate change because of its feedback effects involving water and carbon storage. In this study, we firstly examined the relationship of active layer variation, geomorphological processes and anthropogenic activities by means of small baseline synthetic aperture radar interferometry in Beiluhe, Hoh Xil natural reserve in Tibet Plateau (TP), China. 3.5-Yr observation span of L-band ALOS PALSAR data (June, 2007 to December, 2010) was used. The estimated surface displacements (primarily in the range of 20 mm yr(-1) to 20 mm yr(-1)) and time-series implied evolution of the active layer and permafrost beneath. The motion trend along slopes was complicated due to the geomorphological processes, and thus interdisciplinary interpretations were needed. Anthropogenic influences on this frail permafrost environment were significant, as evident from the remarkable surface settlement along the embankment of Qinghai-Tibet Railway. It is crucial and necessary to monitor this permafrost plateau owing to the consequences arising from a combination of factors related to climate change, geo-hazard prediction, nature conservation and regional sustainable development. (C) 2013 Elsevier Inc All rights reserved.