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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
  • 本地全文:下载
  • 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.
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