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Variations récentes de l'accumulation de la neige sur la calotte antarctique in Evolution des atmosphères planétaires et climatologie de la terre=Evolution of planetary atmospheres and climatology of the earth.

Auteurs :
LAMBERT, G.
PETIT, J. R.
POURCHET, M.
SANAK, J.
LORIUS, C.
Centre national d'Etudes spatiales. (CNES), France

Description :
The snow accumulation at the surface of the Antarctic continent is practically balanced by iceberg calving. Therefore the mass and heat budgets are in equilibrium. However it may be pointed out that, owing to the time-lag of the system, a possible change in the accumulation would not be immediately balanced. A significant excess of accumulation would produce in the subantarctic atmosphere an energy supplement whose effect would be to increase over this accumulation. Such accumulation variations are therefore expected to be observed during several successive years. An experimental study using stratigraphic analyses and radioactive tracers (Lead 210 and fission products) has been performed in a large part of the Antarctic continent. The results show that 30% variations of the accumulation rate can be observed for decades.


Type de document :
Congrès

Source :
Colloque international, 1978, p. 387-397, Références bibliographiques : 17 réf.

Date :
1979

Editeur :
Pays édition : Inconnu

Langue :
Français
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)