Abstract:
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
Gif-su-Yvette Cedex
CNRS-CEA
Country:
FRANCE
Publications/References
Barnola, J.M., D. Raynaud, Y. S. Korotkevich, and C. Lorius. 1987. Vostok ice core provides 160,000-year record of atmospheric CO2. Nature 329:408-14.
Jouzel, J., J.R. Petit, C.Genthon, N.I. Barkov, V.M. Kotlyakov, and V.M. Petrov. 1987. 'Vostok ice core: A continuous isotopic temperature record over the last climatic cycle (160,000 years)', Nature, Vol. 329, ... pp. 403-408.
Jouzel,J., J.R. Petit, and D. Raynaud. 1990. 'Paleoclimatic information from ice cores-The Vostok records', Trans. Royal Soc. Edinburgh-Earth Sci, Vol. 81, pp. 349-355.
Jouzel, J., N.I. Barkov, J.M. Barnola, M. Bender, J. Chappellaz, C. Genthon, V.M. Kotlyakov, V. Lipenkov, C. Lorius, J.R. Petit, D. raynaud, G. Raisbeck, C. Ritz, T. Sowers, M. Stievenard, F. Yiou, and P. Yiou. 1993. "Extending the Vostock ice-core record of paleoclimate to the penultimate glacial period", Nature, Vol. 364, pp. 407-412.
Jouzel, J., C. Waelbroeck, B. Malaize, M. Bender, J.R. Petit, M. Stievenard, N.I. Barkov, J.M. Barnola, T. King, V.M. Kotlyakov, V. Lipenkov, C. Lorius, D. Raynaud, C. Ritz, and T. Sowers. 1996. Climatic interpretation of the recently extended Vostok ice records. Climate Dynamics 12:513-521.
Lorius, C., J. Jouzel, C. Ritz, L. Merlivat, N.I. Barkov, Y.S. Korotkevich, and V.M. Kotlyakov. 1985. "A 150,000-year climatic record from Antarctic ice", Nature, Vol. 316, pp. 591-596.
Lorius, C., J. Jouzel, D. Raynaud, J. Hansen, H. Le Treut. 1990. "The ice-core record: climate sensitivity and future greenhouse warming", Nature, Vol. 347, pp. 130-145.
Lorius, C., J. Jouzel, D. Raynaud, Y.S. Korotkevich, and V.M. Kotlyakov. 1991. "Greenhouse warming, climate sensitivity, and Vostock data", Glaciers-Ocean-Atmosphere Interactions (Proceedings of the International Symposium held at St. Petersburg, September 1990), IAHS Publication Number 208.
Petit, J.R., I. Basile, A. Leruyuet, D. Raynaud, C. Lorius, J. Jouzel, M. Stievenard, V.Y. Lipenkov, N.I. Barkov, B.B. Kudryashov, M. Davis, E. Saltzman, and V. Kotlyakov. 1997. Four climate cycles in the Vostok ice core. Nature 387:359.
Petit, J.R., J. Jouzel, D. Raynaud, N.I. Barkov, J.-M. Barnola, I. Basile, M. Bender, J. Chappellaz, M. Davis, G. Delayque, M. Delmotte, V.M. Kotlyakov, M. Legrand, V.Y. Lipenkov, C. Lorius, L. P pin, C. Ritz, E. Saltzman, and M. Stievenard. 1999. Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica. Nature 399: 429-436.
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