DYNAMICS OF ICE SHEET SURFACE OVER SUBGLACIAL LAKES IN ANTARCTICA

Progress in understanding cascades of subglacial lakes inAntarcticaand surface dynamics was derived using satellite laser altimetry measurements ICESat. The morphological and dynamical pattern troughs and swells indicate subglacial lakes and positions of their shorelines. Oscillations of surfaces in...

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Bibliographic Details
Published in:Ice and Snow
Main Authors: V. M. Kotlyakov, L. N. Vasiliev, A. B. Kachalin, M. Yu. Moskalevsky, A. S. Tyuflin
Format: Article in Journal/Newspaper
Language:Russian
Published: Nauka 2015
Subjects:
антарктида
поверхность ледника
подледниковые озёра
Science
Q
Antarc*
Antarctica
Ice Sheet
Антарктида
Online Access:https://doi.org/10.15356/2076-6734-2012-4-97-103
https://doaj.org/article/e053252f27314c1f9691814d12aef711
Description
Summary:Progress in understanding cascades of subglacial lakes inAntarcticaand surface dynamics was derived using satellite laser altimetry measurements ICESat. The morphological and dynamical pattern troughs and swells indicate subglacial lakes and positions of their shorelines. Oscillations of surfaces in transition zones are periodic, while the changes in surface elevation above subglacial lakes are random. Elevation change in cascade occurs out of phase. The standard deviation for elevation for transition zones is100 cm, in contrast to10 cmabove the subglacial lakes. Complete insight into the cascade process and fluctuations of surface above the adjacent lakes in space and time has been derived using spectrogram. The pattern of surface displacements above cascades of subglacial lakes inAntarcticaand their transition zones are similar. In the sense of technology, the paper initiates the method of mapping subglacial lakes based on satellite laser measurements of elevation.

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