Ice formation in subglacial Lake Vostok, Central Antarctica - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Earth and Planetary Science Letters Année : 2000

Ice formation in subglacial Lake Vostok, Central Antarctica

Résumé

The investigation of chemical and isotopic properties in the lake ice from the Vostok ice core gives clues to the mechanisms involved in ice formation within the lake. A small lake water salinity can be reasonably deduced from the chemical data. Possible implications for the water circulation of Lake Vostok are developed. The characteristics of the isotopic composition of the lake ice indicate that ice formation in Lake Vostok occurred by frazil ice crystal generation due to supercooling as a consequence of rising waters and a possible contrast in water salinity. Subsequent consolidation of the developed loose ice crystals results in the accretion of ice to the ceiling of the lake.

Dates et versions

hal-03110170 , version 1 (14-01-2021)

Identifiants

Citer

R Souchez, J.R Petit, J.-L Tison, J Jouzel, V Verbeke. Ice formation in subglacial Lake Vostok, Central Antarctica. Earth and Planetary Science Letters, 2000, 181 (4), pp.529-538. ⟨10.1016/S0012-821X(00)00228-4⟩. ⟨hal-03110170⟩
23 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More