Gravito-topographic signal of the Lake Vostok area, Antarctica, with the most recent data
| Autor: | Jaroslav Klokočník, I. Pešek, Jan Kostelecký, Václav Cílek, Aleš Bezděk |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Gravity (chemistry)
010504 meteorology & atmospheric sciences Lake Vostok Gravity model SatGravRET2014 Aquatic Science Structural basin 010502 geochemistry & geophysics 01 natural sciences Gravity anomaly Bedmap 2 bedrock topography Gravitational field Gravity field Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences geography geography.geographical_feature_category Ecology Bedrock Geodesy Ridge Tension (geology) General Earth and Planetary Sciences Antarctica Subglacial lakes Gravity aspects Geology |
| Zdroj: | Polar Science. 17:59-74 |
| ISSN: | 1873-9652 |
| Popis: | By using SatGravRET2014 gravito-topography model, based also on satellite GRACE and GOCE data, we computed and plotted the gravity disturbances, the Marussi tensor of the second derivatives of the disturbing potential, the gravity invariants and their specific ratio, the strike angle and the virtual deformations for the Lake Vostok (LV) area in Antarctica. This set of gravity “aspects” provides more detailed and clearer information than the traditional gravity anomalies. Maps with the bedrock topography from Bedmap 2 are added. Some of our estimates and results confirm independent findings of other specialists, some results presented here are new. LV is divided not only into its N and S parts by a ridge, but also to E and W parts. A tension across LV has a prevailing direction E-W. We identified at least three candidates for subglacial lakes south of the lakes 90 E and Sovetskaya. In the gravity aspects this area looks like a basin, where the mentioned lakes might be just a remnant of a large bowl; the orientation of this basin is the same as that of LV; the size comparable to LV. A subglacial connection between all the mentioned lakes is possible and documented via the gravity aspects, namely by the virtual deformations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect