Analyzing Yengisogat Glacier surface velocities with ALOS PALSAR data feature tracking, Karakoram, China
Analyzing Yengisogat Glacier surface velocities with ALOS PALSAR data feature tracking, Karakoram, China
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利用 ALOS PALSAR 数据特征跟踪分析 Yengisogat 冰川表面速度，中国喀喇昆仑
DOI：
10.1007/s12665-012-1563-9
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发表时间：
2012-01
影响因子：
2.8
通讯作者：
Wang, Xin
中科院分区：
文献类型：
--
作者：
Jiang, Zong-li;Liu, Shi-yin;Peters, Juliane;Lin, Jian;Long, Si-chun;Han, Yong-shun;Wang, Xin
人们对喀喇昆仑山脉冰川的详细行为知之甚少。利用先进陆地观测卫星（ALOS）相控阵型L波段合成孔径雷达（PALSAR）数据获取了喀喇昆仑山脉英吉索嘎特冰川的表面速度。 2007 年至 2009 年获取的四个具有 46 天时间基线的 ALOS PALSAR 数据集涵盖了所有四个季节，用于提取偏移场并根据季节速度估计年平均表面速度。对于 ALOS PALSAR 数据，使用 GAMMA 软件中的合成孔径雷达 (SAR) 特征跟踪程序代替 SAR 干涉测量，因为在快速移动的冰川或图像采集之间的时间间隔较长的情况下相干性较低。讨论了测量的准确性，并且测量结果与光学图像特征跟踪的先前结果一致。研究表明，南部支流对冰川的主要水流做出了贡献，南部支流的冰川表面速度比北部支流快。这主要归因于冰川长期发展角度中冰川方位的影响。冰川表面速度的季节和空间变化意味着支流南斯卡姆里冰川可能正在汹涌澎湃。 Copland 等人之前曾提到过这一点。根据沿冰川中心线的表面速度分布估算，南部支流的平衡线高度约为 5,000 米。
Little is known about the detailed behavior of glaciers in the Karakoram Mountains. Advanced land observing satellite (ALOS) phased array type L-band synthetic aperture radar (PALSAR) data were used to obtain the surface velocity of the Yengisogat Glacier in the Karakoram Mountains. Four ALOS PALSAR data sets with 46 days temporal baseline acquired from 2007 to 2009 covered all four seasons and were used to extract the offset fields and estimate annual average surface velocity based on seasonal velocities. For the ALOS PALSAR data the synthetic aperture radar (SAR) feature-tracking procedures within the GAMMA software were utilized instead of SAR interferometry because of low coherence in case of fast-moving glaciers or large time intervals between the image acquisitions. The accuracy of the measurements is discussed, and the measurements were consistent with previous results from optical imagery feature tracking. It was revealed that the south tributaries contributed to the main flow of the glacier, with the glacier surface velocities of the south tributaries moving more rapidly than the north tributaries. This was mainly attributed to the effect of the glacier’s aspect in the glacier long-term development point of view. Seasonal and spatial variations of the glacier surface velocity imply that the tributary South Skamri Glacier is probably surging. This has previously been mentioned by some researchers such as Copland et al. The Equilibrium Line Altitude was found to be at about 5,000 m a.s.l for south tributaries, estimated from the surface velocity distribution along the glacier centerline.
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影响因子：
5.2
作者：
Berthier, E;Arnaud, Y;Rémy, F
通讯作者：
Rémy, F
影响因子：
3.4
作者：
D. Quincey;A. Luckman;D. Benn
通讯作者：
D. Quincey;A. Luckman;D. Benn
DOI：
10.2307/1551118
发表时间：
1981-01
期刊：
Arctic and alpine research
影响因子：
--
作者：
R. Armstrong;W. Paterson
通讯作者：
R. Armstrong;W. Paterson
DOI：
10.1007/978-3-642-11741-1_11
发表时间：
2010
期刊：
--
影响因子：
--
作者：
Ye Xia
通讯作者：
Ye Xia
影响因子：
1.6
作者：
Aeschbacher, J;Liniger, H;Weingartner, R
通讯作者：
Weingartner, R