Glacial-interglacial temperature records were derived from the 2083-m ice core from Vostok, Antarctica, obtained during a series of drillings in th early 1970s and 1980. Temperature records were derived from isotopes of oxygen-18 and deuterium in snowfall. Drilling continued at Vostok and was completed in January 1998, reaching a depth of 3623 m, the deepest ice core ... ever recovered (Petit et al. 1997, 1999). The resulting core allows the ice core record of climate properties at Vostok to be extended to about 420 kyr BP.
The 420-kyr Vostok temperature record in this dataset was reconstructed from the continuous deuterium profile measured along the core. The new measurements were taken along ice in increments between 0.5 and 2 m in length to a depth of 2080 m and then every 1 m for the remainder of the upper 3310-m of the ice core. Isotopic analysis was again performed by the Geochemistry team at LSCE at Saclay.
The tabulated data show the annual temperature variation relative to the mean annual surface temperature for Vostok (-55.5 C).
The Vostok temperature data is available via ftp from:
Laboratoire de Glaciologie et de
Geophysique de l'Environnement
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