Greenland temperature response to climate forcing during the last deglaciation

Christo Buizert; Vasileios Gkinis; Jeffrey P. Severinghaus; Feng He; Benoit S. Lecavalier; Philippe Kindler; Markus Leuenberger; Anders E. Carlson; Bo Vinther; Valérie Masson-Delmotte; James W.C. White; Zhengyu Liu; Bette Otto-Bliesner; Edward J. Brook

doi:10.1126/science.1254961

Greenland temperature response to climate forcing during the last deglaciation

Christo Buizert
, Vasileios Gkinis
, Jeffrey P. Severinghaus
, Feng He
, Benoit S. Lecavalier
, Philippe Kindler
, Markus Leuenberger
, Anders E. Carlson
, Bo Vinther
, Valérie Masson-Delmotte
, James W.C. White
, Zhengyu Liu
, Bette Otto-Bliesner
, Edward J. Brook

Paleo and Polar Climate

Oregon State University
University of Copenhagen
University of Colorado Boulder
University of California at San Diego
University of Wisconsin-Madison
Memorial University of Newfoundland
University of Bern
Commissariat à l’énergie atomique et aux énergies alternatives
Peking University
National Center for Atmospheric Research

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

273 Scopus citations

Abstract

Greenland ice core water isotopic composition (δ¹⁸O) provides detailed evidence for abrupt climate changes but is by itself insufficient for quantitative reconstruction of past temperatures and their spatial patterns. We investigate Greenland temperature evolution during the last deglaciation using independent reconstructions from three ice cores and simulations with a coupled ocean-atmosphere climate model. Contrary to the traditional δ¹⁸O interpretation, the Younger Dryas period was 4.5° ± 2°C warmer than the Oldest Dryas, due to increased carbon dioxide forcing and summer insolation. The magnitude of abrupt temperature changes is larger in central Greenland (9° to 14°C) than in the northwest (5° to 9°C), fingerprinting a North Atlantic origin. Simulated changes in temperature seasonality closely track changes in the Atlantic overturning strength and support the hypothesis that abrupt climate change is mostly a winter phenomenon.

Original language	English
Pages (from-to)	1177-1180
Number of pages	4
Journal	Science
Volume	345
Issue number	6201
DOIs	https://doi.org/10.1126/science.1254961
State	Published - Sep 5 2014

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Buizert, C., Gkinis, V., Severinghaus, J. P., He, F., Lecavalier, B. S., Kindler, P., Leuenberger, M., Carlson, A. E., Vinther, B., Masson-Delmotte, V., White, J. W. C., Liu, Z., Otto-Bliesner, B., & Brook, E. J. (2014). Greenland temperature response to climate forcing during the last deglaciation. Science, 345(6201), 1177-1180. https://doi.org/10.1126/science.1254961

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title = "Greenland temperature response to climate forcing during the last deglaciation",

abstract = "Greenland ice core water isotopic composition (δ18O) provides detailed evidence for abrupt climate changes but is by itself insufficient for quantitative reconstruction of past temperatures and their spatial patterns. We investigate Greenland temperature evolution during the last deglaciation using independent reconstructions from three ice cores and simulations with a coupled ocean-atmosphere climate model. Contrary to the traditional δ18O interpretation, the Younger Dryas period was 4.5° ± 2°C warmer than the Oldest Dryas, due to increased carbon dioxide forcing and summer insolation. The magnitude of abrupt temperature changes is larger in central Greenland (9° to 14°C) than in the northwest (5° to 9°C), fingerprinting a North Atlantic origin. Simulated changes in temperature seasonality closely track changes in the Atlantic overturning strength and support the hypothesis that abrupt climate change is mostly a winter phenomenon.",

author = "Christo Buizert and Vasileios Gkinis and Severinghaus, \{Jeffrey P.\} and Feng He and Lecavalier, \{Benoit S.\} and Philippe Kindler and Markus Leuenberger and Carlson, \{Anders E.\} and Bo Vinther and Val{\'e}rie Masson-Delmotte and White, \{James W.C.\} and Zhengyu Liu and Bette Otto-Bliesner and Brook, \{Edward J.\}",

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doi = "10.1126/science.1254961",

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T1 - Greenland temperature response to climate forcing during the last deglaciation

AU - Buizert, Christo

AU - Gkinis, Vasileios

AU - Severinghaus, Jeffrey P.

AU - He, Feng

AU - Lecavalier, Benoit S.

AU - Kindler, Philippe

AU - Leuenberger, Markus

AU - Carlson, Anders E.

AU - Vinther, Bo

AU - Masson-Delmotte, Valérie

AU - White, James W.C.

AU - Liu, Zhengyu

AU - Otto-Bliesner, Bette

AU - Brook, Edward J.

PY - 2014/9/5

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N2 - Greenland ice core water isotopic composition (δ18O) provides detailed evidence for abrupt climate changes but is by itself insufficient for quantitative reconstruction of past temperatures and their spatial patterns. We investigate Greenland temperature evolution during the last deglaciation using independent reconstructions from three ice cores and simulations with a coupled ocean-atmosphere climate model. Contrary to the traditional δ18O interpretation, the Younger Dryas period was 4.5° ± 2°C warmer than the Oldest Dryas, due to increased carbon dioxide forcing and summer insolation. The magnitude of abrupt temperature changes is larger in central Greenland (9° to 14°C) than in the northwest (5° to 9°C), fingerprinting a North Atlantic origin. Simulated changes in temperature seasonality closely track changes in the Atlantic overturning strength and support the hypothesis that abrupt climate change is mostly a winter phenomenon.

AB - Greenland ice core water isotopic composition (δ18O) provides detailed evidence for abrupt climate changes but is by itself insufficient for quantitative reconstruction of past temperatures and their spatial patterns. We investigate Greenland temperature evolution during the last deglaciation using independent reconstructions from three ice cores and simulations with a coupled ocean-atmosphere climate model. Contrary to the traditional δ18O interpretation, the Younger Dryas period was 4.5° ± 2°C warmer than the Oldest Dryas, due to increased carbon dioxide forcing and summer insolation. The magnitude of abrupt temperature changes is larger in central Greenland (9° to 14°C) than in the northwest (5° to 9°C), fingerprinting a North Atlantic origin. Simulated changes in temperature seasonality closely track changes in the Atlantic overturning strength and support the hypothesis that abrupt climate change is mostly a winter phenomenon.

UR - https://www.scopus.com/pages/publications/84907210968

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DO - 10.1126/science.1254961

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VL - 345

SP - 1177

EP - 1180

JO - Science

JF - Science

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ER -

Greenland temperature response to climate forcing during the last deglaciation

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