Tab 1-4 Weight and volume reduction as well as surface subsidence during abrasion experiments

Antarctic land surfaces in South Victoria Land, all without a covering of vegetation, are actively formed by winds which often reach velocities of more than 100 km/h. Consequently, deflation and abrasion are essential factors in the process of slope formation. Water erosion, active only during the v...

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Bibliographic Details
Main Author: Miotke, Franz-Dieter
Format: Dataset
Language:English
Published: PANGAEA 1979
Subjects:
Calculated
Loss
Rock type
Table
Time in minutes
Wind tunnel experiment
Antarctic
Victoria Land
Antarc*
Polarforschung
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.754387
https://doi.org/10.1594/PANGAEA.754387
Description
Summary:Antarctic land surfaces in South Victoria Land, all without a covering of vegetation, are actively formed by winds which often reach velocities of more than 100 km/h. Consequently, deflation and abrasion are essential factors in the process of slope formation. Water erosion, active only during the very short summer period, is limited to a few localities in South Victoria Land. Experiments in a wind tunnel proved that ventifacts in the Dry Valleys can be formed within a few decades or at the most, a few centuries. Yearly corrasion rates average around a maximum of a few millimeters. Considerable variability is caused by the different exposures of ventifacts within the micro relief end the varying resistance of the rocks. The importance of ice crystals (snow) for abrasion processes should not be overestimated.

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