DOI: 10.5194/tc-9-703-2015
Scopus记录号: 2-s2.0-84928487583
论文题名: Mass changes of southern and northern inylchek glacier, Central Tian Shan, kyrgyzstan, during ∼1975 and 2007 derived from remote sensing data
作者: Shangguan D ; H ; , Bolch T ; , Ding Y ; J ; , Kröhnert M ; , Pieczonka T ; , Wetzel H ; U ; , Liu S ; Y
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 2 起始页码: 703
结束页码: 717
语种: 英语
英文关键词: ALOS
; cryosphere
; data set
; digital elevation model
; glacier mass balance
; glacier retreat
; remote sensing
; Inylchek Glacier
; Kyrgyzstan
; Kyrgyzstan
; Merzbacher Lake
; Tien Shan
; Ysyk-Kol
英文摘要: Glacier melt is an essential source of freshwater for the arid regions surrounding the Tian Shan. However, the knowledge about glacier volume and mass changes over the last decades is limited. In the present study, glacier area, glacier dynamics and mass changes are investigated for the period ∼1975-2007 for Southern Inylchek Glacier (SIG) and Northern Inylchek Glacier (NIG), the largest glacier system in Central Tian Shan separated by the regularly draining Lake Merzbacher. The area of NIG increased by 2.0 ± 0.1 km2 (∼1.3%) in the period ∼1975-2007. In contrast, SIG has shrunk continuously in all investigated periods since ∼1975. Velocities of SIG in the central part of the ablation region reached ∼100-120 m ag'1 in 2002/2003, which was slightly higher than the average velocity in 2010/2011. The central part of SIG flows mainly towards Lake Merzbacher rather than towards its terminus. The measured velocities at the distal part of the terminus downstream of Lake Merzbacher were below the uncertainty, indicating very low flow with even stagnant parts. Geodetic glacier mass balances have been calculated using multioral digital elevation models from KH-9 Hexagon (representing the year 1975), SRTM3 (1999), ALOS PRISM (2006) and SPOT-5 high-resolution geometrical (HRG) data (2007). In general, a continuous mass loss for both SIG and NIG could be observed between ∼1975 and 2007. SIG lost mass at a rate of 0.43 ± 0.10 m w.e. ag'1 and NIG at a rate of 0.25 ± 0.10 m w.e. ag'1 within the period ∼1975-1999. For the period 1999-2007, the highest mass loss of 0.57 ± 0.46 m w.e. ag'1 was found for NIG, whilst SIG showed a potential moderate mass loss of 0.28 ± 0.46 m w.e. ag'1. Both glaciers showed a small retreat during this period. Between ∼1975 and 1999, we identified a thickening at the front of NIG with a maximum surface elevation increase of about 150 m as a consequence of a surge event. In contrast significant thinning (>0.5 m ag'1) and comparatively high velocities close to the dam of Lake Merzbacher were observed for SIG, indicating that Lake Merzbacher enhances glacier mass loss. © Author(s) 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75316
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: State Key Laboratory of Cryospheric Science, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China; Department of Geography, University of Zurich, Zurich, Switzerland; Institute for Cartography, Technische Universität Dresden, Dresden, Germany; GFZ German Research Centre for Geosciences, Potsdam, Germany
Recommended Citation:
Shangguan D,H,, Bolch T,et al. Mass changes of southern and northern inylchek glacier, Central Tian Shan, kyrgyzstan, during ∼1975 and 2007 derived from remote sensing data[J]. Cryosphere,2015-01-01,9(2)