Cold glaciers in the central Transantarctic Mountains, Antarctica: dry ablation areas and subglacial erosion
نویسندگان
چکیده
منابع مشابه
Cold-based Glaciers in the Western Dry Valleys of Antarctica: Terrestrial Landforms and Martian Analogs:
Introduction: Basal-ice and surface-ice temperatures are key parameters governing the style of glacial erosion and deposition. Temperate glaciers contain basal ice at the pressure-melting point (wet-based) and commonly exhibit extensive areas of surface melting. Such conditions foster basal plucking and abrasion, as well as deposition of thick matrix-supported drift sheets, moraines, and glacio...
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There are different views about the amount and timing of surface uplift in the Transantarctic Mountains and the geophysical mechanisms involved. Our new interpretation of the landscape volution and tectonic history of the Dry Valleys area of the Transantarctic Mountains i based on geomorphic mapping of an area of 10,000 km 2. The landforms are dated mainly by their association with volcanic ash...
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[1] We present measurements of ice thickness, gravimetry and surface elevation on Pine Island Glacier, West Antarctica, separated by a period of 49 years. At one station, on the main trunk of the glacier we measured a surface elevation lowering with no significant change in ice thickness. We interpret these as indicating subglacial erosion of 31.8 13.4 m at this location, at a mean rate over th...
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The cold polar glaciers of the McMurdo Dry Valleys (MCMDV), Antarctica, are characterized by low accumulation (10 cmw.e. a), high sublimation (7–9 cmw.e. a) and low melt rates (1–3 cmw.e. a) (Fountain and others, 1998). Meltwater production and flow is limited to the near surface of these cold polar glaciers, where the average ice temperature at 15m depth is –178C. Meltwater flow, as on other g...
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Extended abstract 1- Introduction Climate change is one of the problems human is facing today, and most of the scientific societies know that it is rooted in the distribution of greenhouse gases. Distribution of greenhouse gases with large volumes and in large spans has been affecting the energy budget and consequently has caused earth rapid temperature increase during the last deca...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1971
ISSN: 0022-1430,1727-5652
DOI: 10.3189/s0022143000013320