DOI: 10.5194/tc-8-2367-2014
Scopus记录号: 2-s2.0-84918522954
论文题名: Deglaciation of the Caucasus Mountains, Russia/Georgia, in the 21st century observed with ASTER satellite imagery and aerial photography
作者: Shahgedanova M ; , Nosenko G ; , Kutuzov S ; , Rototaeva O ; , Khromova T
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 6 起始页码: 2367
结束页码: 2379
语种: 英语
英文关键词: aerial photography
; ASTER
; deglaciation
; Landsat
; precipitation (climatology)
; satellite imagery
; spatial resolution
; temperature effect
; twenty first century
; Caucasus
; Mount Elbrus
英文摘要: Changes in the map area of 498 glaciers located on the Main Caucasus ridge (MCR) and on Mt. Elbrus in the Greater Caucasus Mountains (Russia and Georgia) were assessed using multispectral ASTER and panchromatic Landsat imagery with 15 m spatial resolution in 1999/2001 and 2010/2012. Changes in recession rates of glacier snouts between 1987-2001 and 2001-2010 were investigated using aerial photography and ASTER imagery for a sub-sample of 44 glaciers. In total, glacier area decreased by 4.7 ± 2.1% or 19.2 ± 8.7 km2 from 407.3 ± 5.4 km2 to 388.1 ± 5.2 km2. Glaciers located in the central and western MCR lost 13.4 ± 7.3 km2 (4.7 ± 2.5%) in total or 8.5 km2 (5.0 ± 2.4%) and 4.9 km2 (4.1 ± 2.7%) respectively. Glaciers on Mt. Elbrus, although located at higher elevations, lost 5.8 ± 1.4 km2 (4.9 ± 1.2%) of their total area. The recession rates of valley glacier termini increased between 1987-2000/01 and 2000/01-2010 (2000 for the western MCR and 2001 for the central MCR and Mt. Elbrus) from 3.8 ± 0.8, 3.2 ± 0.9 and 8.3 ± 0.8 m yr-1 to 11.9 ± 1.1, 8.7 ± 1.1 and 14.1 ± 1.1 m yr-1 in the central and western MCR and on Mt. Elbrus respectively. The highest rate of increase in glacier termini retreat was registered on the southern slope of the central MCR where it has tripled. A positive trend in summer temperatures forced glacier recession, and strong positive temperature anomalies in 1998, 2006, and 2010 contributed to the enhanced loss of ice. An increase in accumulation season precipitation observed in the northern MCR since the mid-1980s has not compensated for the effects of summer warming while the negative precipitation anomalies, observed on the southern slope of the central MCR in the 1990s, resulted in stronger glacier wastage. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74750
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: Department of Geography and Environmental Science, Walker Institute for Climate System Research, University of Reading, Whiteknights, Reading, United Kingdom; Laboratory of Glaciology, Institute of Geography, Russian Academy of Sciences, 29 Staromonetny Pereulok, Moscow, Russian Federation
Recommended Citation:
Shahgedanova M,, Nosenko G,, Kutuzov S,et al. Deglaciation of the Caucasus Mountains, Russia/Georgia, in the 21st century observed with ASTER satellite imagery and aerial photography[J]. Cryosphere,2014-01-01,8(6)