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标题：Movement of Besiberris Rock Glacier, Central Pyrenees, Spain: Data from a 10-Year Geodetic Survey
其他标题：Movement of Besiberris Rock Glacier, Central Pyrenees, Spain: Data from a 10-Year Geodetic Survey
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作者：Javier Chueca ; Asunción Julián
期刊名称：Arctic, Antarctic, and Alpine Research
印刷版ISSN：1523-0430
电子版ISSN：1938-4246
出版年度：2005
卷号：37
期号：2
页码：163-170
DOI：10.1657/1523-0430(2005)037[0163:MOBRGC]2.0.CO%3B2
摘要：A 10-yr (1993–2003) geodetic survey was conducted at the Besiberris rock glacier, a tongue-shaped, glacigenic rock glacier, located in the eastern-central Spanish Pyrenees (42°35′48″N, 0°49′20″E). Displacement measurements were made on three traverse lines across the rock glacier. Surface horizontal velocity increases from the head to the toe sectors (average values: traverse line A = 8.72 cm yr −1 ; line B = 10.65 cm yr −1 ; line C = 13.35 cm yr −1 ). Velocities are greater at the axis of the rock glacier compared to its lateral margins. In terms of vertical movement, the rock glacier has shown clear thinning of an ice-core. In all three traverse lines, surface lowering has been detected (average values: line A = 5.00 cm yr −1 ; line B = 7.10 cm yr −1 ; line C = 5.27 cm yr −1 ). This general lowering is interpreted as the adjustment of the rock glacier to the climatic amelioration (higher temperature, drier conditions, and reduced snowfall) observed in the Pyrenean region since the end of the Little Ice Age and accentuated in the last few decades.