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Article Dans Une Revue Annals of Glaciology Année : 2004

The changes in isotope composition and accumulation of snow at Vostok station, East Antarctica, over the past 200 years

Résumé

High-resolution records of isotope composition (dD) and accumulation of snow have been obtained from 10-12 m deep snow pits dug in the vicinity of Vostok station during the 1979/80 and 1999/2000 Antarctic field seasons. We employ meteorological, balloon-sounding and snow-stake data to interpret the isotope record in terms of past temperature changes. Our reconstruction suggests that snow accumulation rate and the near-surface air temperature at Vostok have varied during the past 200 years between 15 and 30 kg m-2 a-1 , and between-56 and-558C, respectively, with a slight general tendency to increase from the past to the present. Both parameters reveal a 50 year periodicity that correlates with the Pacific Decadal Oscillation index, implying a climatic teleconnection between central Antarctica and the tropical Pacific.
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Dates et versions

hal-03102768 , version 1 (11-01-2021)

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Alexei Ekaykin, Vladimir Ya. Lipenkov, Irina Kuzmina, Jean Robert Petit, Valérie Masson-Delmotte, et al.. The changes in isotope composition and accumulation of snow at Vostok station, East Antarctica, over the past 200 years. Annals of Glaciology, 2004, 39, pp.569-575. ⟨10.3189/172756404781814348⟩. ⟨hal-03102768⟩
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