DOI: 10.1016/j.gloplacha.2012.12.004
论文题名: Deriving surface motion of mountain glaciers in the Tuomuer-Khan Tengri Mountain Ranges from PALSAR images
作者: Li J. ; Li Z. ; Zhu J. ; Ding X. ; Wang C. ; Chen J.
刊名: Global and Planetary Change
ISSN: 0921-8331
出版年: 2013
卷: 101 起始页码: 61
结束页码: 71
语种: 英语
英文关键词: Glacier
; Offset-tracking
; SAR
; Snowline
; Velocity
Scopus关键词: Displacement field
; Dynamic equilibria
; Estimation errors
; Flow characteristic
; Glacier dynamics
; Glacier flow
; Glacier melting
; Glacier motions
; Mass balance
; Mountain glaciers
; Mountain ranges
; Offset-tracking
; SAR
; Snowline
; Surface motions
; Velocity changes
; Climate change
; Debris
; Flow velocity
; Glacial geology
; Glaciers
; Melting
; Velocity
; Landforms
; climate change
; flooding
; flow velocity
; glaciation
; glacier dynamics
; image analysis
; mountain region
; PALSAR
; runoff
; snow cover
; surface flux
; tracking
; velocity profile
; China
; Mount Tuomuer
; Tien Shan
; Xinjiang Uygur
英文摘要: Glaciers flow velocity is an important parameter for the study of glacier dynamics, mass balance and climate change, and can provide precursory warning of glacier melting induced flooding, debris flowing, etc. The Tuomuer-Khan Tengri Mountain Range is one of the largest glaciated areas in Tian Shan Mountain. However, the knowledge of glacier motion in this area is still rather limited. Using the method of robust Offset-tracking and four pairs of PALSAR images covering the Tuomuer-Khan Tengri Mountain Range, this paper estimates the displacement fields of the mountain glaciers in this area for each pair. The displacement fields are then mapped into daily glacier flow velocities by dividing the acquiring intervals of each pair. Using a series of checkpoints selected in stationary areas where the displacements can be assumed to be zero, we evaluate the estimation error of the displacement fields and find that most of them are less than 2.17. cm/day. The displacement fields are analyzed in detail with regards to glacier bed terrain and glacial temperature and thickness. We find that they are in excellent accordance with the flow characteristic of typical mountain glaciers. The velocity changes among the observation years have been carefully examined. This along with the associated runoff measurements makes us conclude that the glaciers in the Tuomuer-Khan Tengri Range are assumedly in dynamic equilibrium between intensified melting and increased precipitation and glaciation, and their velocity will maintain stable in the near future. We also find that the altitudes of the velocity peaks are close to the recorded snowline, which indicates that detecting the changes of velocity peaks' position might provide a reference for monitoring the changes of the snowlines. © 2012 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872252891&doi=10.1016%2fj.gloplacha.2012.12.004&partnerID=40&md5=1cac5946054a374eaae532a4187a2d7d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11237
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
Recommended Citation:
Li J.,Li Z.,Zhu J.,et al. Deriving surface motion of mountain glaciers in the Tuomuer-Khan Tengri Mountain Ranges from PALSAR images[J]. Global and Planetary Change,2013-01-01,101.