Punctuated Equilibrium of the Surface above Subglacial Lake Vostok in Antarctica

被引：2

作者：

Kotlyakov, V. M. ^{[1
]}

Vasiliev, L. N. ^{[1
]}

Kachalin, A. B. ^{[1
]}

Moskalevskii, M. Yu. ^{[1
]}

Tyuflin, A. S. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Geog, Moscow, Russia

来源：

DOKLADY EARTH SCIENCES | 2011年 / 438卷 / 01期

关键词：

DOKLADY Earth Science; Incline Plane; ICESat; Elevation Measurement; Surface Fluctuation;

D O I：

10.1134/S1028334X11050047

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Progress in understanding the surface dynamics above the subglacial Lake Vostok is achieved owing to use of the ICESat satellite laser elevation measurements, which enabled us to determine surface fluctuations with precision up to 3 cm. A new idea on punctuated equilibrium of the surface above Lake Vostok is elaborated; this idea is concluded in irregular, sharp vertical displacements of the ice surface by up to 40 cm. Deformation of the surface is accompanied with a common raising or lowering, and with local vertical displacements up to 20 cm in amplitude. It has been proved experimentally that snow transport on the surface above the lake causes only redistribution of snow and forms fractal structures that do not have any effect on surface deformation. The form of the surface is not an inclined plane due to many bends that are particularly related to ice flowing on the lake water area.

引用

页码：649 / 651

页数：3

共 4 条

[1] Geoscience Laser Altimeter System (GLAS) on the ICESat mission: On-orbit measurement performance [J].