DYNAMICS OF ICE SHEET SURFACE OVER SUBGLACIAL LAKES IN ANTARCTICA

• 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

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.