| DOI: | 10.1016/j.gloplacha.2014.04.002
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| 论文题名: | 3-D movement mapping of the alpine glacier in Qinghai-Tibetan Plateau by integrating D-InSAR, MAI and Offset-Tracking: Case study of the Dongkemadi Glacier |
| 作者: | Hu J.; Li Z.-W.; Li J.; Zhang L.; Ding X.-L.; Zhu J.-J.; Sun Q.
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| ISSN: | 0921-8496
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| 出版年: | 2014
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| 卷: | 118 | | 起始页码: | 62
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| 结束页码: | 68
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| 语种: | 英语
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| 英文关键词: | Alpine glacier
; InSAR
; Qinghai-Tibetan Plateau
; Three-dimensional movement
; Variance component estimation
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| Scopus关键词: | Geodetic satellites
; Iterative methods
; Motion compensation
; Three dimensional
; Alpine glacier
; InSAR
; Qinghai-Tibetan plateau
; Three dimensional movement
; Variance component estimation
; Synthetic aperture radar
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| 英文摘要: | Three-dimensional (3-D) movements of the Dongkemadi Glacier in the Qinghai-Tibetan Plateau over 2007-2010 are fully determined by using L-band Advanced Land Observing Satellite (ALOS) Phased Array type L-band Synthetic Aperture Radar (PALSAR) ascending and C-band Environmental Satellite (ENVISAT) Advanced Synthetic Aperture Radar (ASAR) descending acquisitions. In order to yield an optimal 3-D solution, a variance component estimation (VCE) algorithm is applied to weigh the D-InSAR and MAI measurements derived from PALSAR data and the Offset-Tracking measurements from ASAR data under the scheme of weighted least squares adjustment. By exploiting the InSAR measurements themselves to determine the weights iteratively, the presented approach results in an accuracy of centimeter to decimeter per year for all the three velocity vectors. The horizontal component shows that the four main tributary streams in the Dongkemadi Glacier are all flowing from the central area of the glacier to its surroundings, along the steepest slope descent direction and with a rate up to about 5. m/yr. The glacier thickening or thinning is resolved from the vertical component by subtracting the down-slope movement. A number of interesting accumulation and ablation areas are also detected, with vertical variations of 1-2. m/yr, as a result of the horizontal glacier movement or the existence of concave terrain. This can be used as a good indication of the ice dynamics and the location of the subglacial water in the alpine glacier. © 2014 Elsevier B.V. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899880940&doi=10.1016%2fj.gloplacha.2014.04.002&partnerID=40&md5=8c59696aa4e3a388d13db3ffc7efcfb5
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/11402
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| Appears in Collections: | 全球变化的国际研究计划
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作者单位: | School of Geosciences and Info-Physics, Central South University, Changsha 410083, Hunan, China
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| Recommended Citation: | |
Hu J.,Li Z.-W.,Li J.,et al. 3-D movement mapping of the alpine glacier in Qinghai-Tibetan Plateau by integrating D-InSAR, MAI and Offset-Tracking: Case study of the Dongkemadi Glacier[J],2014-01-01,118.
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