A 25,000-year tropical climate history from Bolivian ice cores

L. G. Thompson; M. E. Davis; E. Mosley-Thompson; T. A. Sowers; K. A. Henderson; V. S. Zagorodnov; P. N. Lin; V. N. Mikhalenko; R. K. Campen; J. F. Bolzan; J. Cole-Dai; B. Francou

doi:10.1126/science.282.5395.1858

A 25,000-year tropical climate history from Bolivian ice cores

L. G. Thompson, M. E. Davis, E. Mosley-Thompson, T. A. Sowers, K. A. Henderson, V. S. Zagorodnov, P. N. Lin, V. N. Mikhalenko, R. K. Campen, J. F. Bolzan, J. Cole-Dai, B. Francou

Earth and Environmental Systems Institute

Research output: Contribution to journal › Article › peer-review

562 Scopus citations

Abstract

Ice cores that were recovered from the summit of Sajama mountain in Bolivia provide carbon-14-dated tropical records and extend to the Late Glacial Stage (LGS). Oxygen isotopic ratios of the ice decreased 5.4 per mil between the early Holocene and the Last Glacial Maximum, which is consistent with values from other ice cores. The abrupt onset and termination of a Younger Dryas-type event suggest atmospheric processes as the probable drivers. Regional accumulation increased during the LGS, during deglaciation, and over the past 3000 years, which is concurrent with higher water levels in regional paleolakes. Unlike polar cores, Sajama glacial ice contains eight times less dust than the Holocene ice, which reflects wetter conditions and extensive snow cover.

Original language	English (US)
Pages (from-to)	1858-1864
Number of pages	7
Journal	Science
Volume	282
Issue number	5395
DOIs	https://doi.org/10.1126/science.282.5395.1858
State	Published - Dec 4 1998

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10.1126/science.282.5395.1858

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title = "A 25,000-year tropical climate history from Bolivian ice cores",

abstract = "Ice cores that were recovered from the summit of Sajama mountain in Bolivia provide carbon-14-dated tropical records and extend to the Late Glacial Stage (LGS). Oxygen isotopic ratios of the ice decreased 5.4 per mil between the early Holocene and the Last Glacial Maximum, which is consistent with values from other ice cores. The abrupt onset and termination of a Younger Dryas-type event suggest atmospheric processes as the probable drivers. Regional accumulation increased during the LGS, during deglaciation, and over the past 3000 years, which is concurrent with higher water levels in regional paleolakes. Unlike polar cores, Sajama glacial ice contains eight times less dust than the Holocene ice, which reflects wetter conditions and extensive snow cover.",

author = "Thompson, {L. G.} and Davis, {M. E.} and E. Mosley-Thompson and Sowers, {T. A.} and Henderson, {K. A.} and Zagorodnov, {V. S.} and Lin, {P. N.} and Mikhalenko, {V. N.} and Campen, {R. K.} and Bolzan, {J. F.} and J. Cole-Dai and B. Francou",

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T1 - A 25,000-year tropical climate history from Bolivian ice cores

AU - Thompson, L. G.

AU - Davis, M. E.

AU - Mosley-Thompson, E.

AU - Sowers, T. A.

AU - Henderson, K. A.

AU - Zagorodnov, V. S.

AU - Lin, P. N.

AU - Mikhalenko, V. N.

AU - Campen, R. K.

AU - Bolzan, J. F.

AU - Cole-Dai, J.

AU - Francou, B.

PY - 1998/12/4

Y1 - 1998/12/4

N2 - Ice cores that were recovered from the summit of Sajama mountain in Bolivia provide carbon-14-dated tropical records and extend to the Late Glacial Stage (LGS). Oxygen isotopic ratios of the ice decreased 5.4 per mil between the early Holocene and the Last Glacial Maximum, which is consistent with values from other ice cores. The abrupt onset and termination of a Younger Dryas-type event suggest atmospheric processes as the probable drivers. Regional accumulation increased during the LGS, during deglaciation, and over the past 3000 years, which is concurrent with higher water levels in regional paleolakes. Unlike polar cores, Sajama glacial ice contains eight times less dust than the Holocene ice, which reflects wetter conditions and extensive snow cover.

AB - Ice cores that were recovered from the summit of Sajama mountain in Bolivia provide carbon-14-dated tropical records and extend to the Late Glacial Stage (LGS). Oxygen isotopic ratios of the ice decreased 5.4 per mil between the early Holocene and the Last Glacial Maximum, which is consistent with values from other ice cores. The abrupt onset and termination of a Younger Dryas-type event suggest atmospheric processes as the probable drivers. Regional accumulation increased during the LGS, during deglaciation, and over the past 3000 years, which is concurrent with higher water levels in regional paleolakes. Unlike polar cores, Sajama glacial ice contains eight times less dust than the Holocene ice, which reflects wetter conditions and extensive snow cover.

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A 25,000-year tropical climate history from Bolivian ice cores

Abstract

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