Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm Period
During an interval of the Late Pliocene, referred to here as the mid-Pliocene Warm Period (mPWP; 3.264 to 3.025 million years ago), global mean temperature was similar to that predicted for the end of this century, and atmospheric carbon dioxide concentrations were higher than pre-industrial levels....
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doaj-f71a08cb5b1e449a86c181372f2564ad2020-11-25T01:05:36ZengCopernicus PublicationsClimate of the Past1814-93241814-93322015-03-0111340342410.5194/cp-11-403-2015Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm PeriodA. M. Dolan0S. J. Hunter1D. J. Hill2A. M. Haywood3S. J. Koenig4B. L. Otto-Bliesner5A. Abe-Ouchi6F. Bragg7W.-L. Chan8M. A. Chandler9C. Contoux10A. Jost11Y. Kamae12G. Lohmann13D. J. Lunt14G. Ramstein15N. A. Rosenbloom16L. Sohl17C. Stepanek18H. Ueda19Q. Yan20Z. Zhang21School of Earth and Environment, Earth and Environment Building, University of Leeds, Leeds, LS2 9JT, UKSchool of Earth and Environment, Earth and Environment Building, University of Leeds, Leeds, LS2 9JT, UKSchool of Earth and Environment, Earth and Environment Building, University of Leeds, Leeds, LS2 9JT, UKSchool of Earth and Environment, Earth and Environment Building, University of Leeds, Leeds, LS2 9JT, UKDepartment of Geosciences, University of Massachusetts, 611 N. Pleasant St, Amherst, MA 01003, USANational Center for Atmospheric Research, Boulder, Colorado, USAAtmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, JapanSchool of Geographical Sciences, University of Bristol, University Road, Bristol, BS8 1SS, UKAtmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, JapanColumbia University – NASA/GISS, New York, NY, USAAix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, FranceSorbonne Universités, UPMC Univ Paris 06, UMR 7619, Metis, 75005, Paris, FranceGraduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, JapanAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, GermanySchool of Geographical Sciences, University of Bristol, University Road, Bristol, BS8 1SS, UKLaboratoire des Sciences du Climat et de l'Environnement, Saclay, FranceNational Center for Atmospheric Research, Boulder, Colorado, USAColumbia University – NASA/GISS, New York, NY, USAAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, GermanyGraduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, JapanBjerknes Centre for Climate Research, Uni Research Climate, Bergen, NorwayBjerknes Centre for Climate Research, Uni Research Climate, Bergen, NorwayDuring an interval of the Late Pliocene, referred to here as the mid-Pliocene Warm Period (mPWP; 3.264 to 3.025 million years ago), global mean temperature was similar to that predicted for the end of this century, and atmospheric carbon dioxide concentrations were higher than pre-industrial levels. Sea level was also higher than today, implying a significant reduction in the extent of the ice sheets. Thus, the mPWP provides a natural laboratory in which to investigate the long-term response of the Earth's ice sheets and sea level in a warmer-than-present-day world. <br><br> At present, our understanding of the Greenland ice sheet during the mPWP is generally based upon predictions using single climate and ice sheet models. Therefore, it is essential that the model dependency of these results is assessed. The Pliocene Model Intercomparison Project (PlioMIP) has brought together nine international modelling groups to simulate the warm climate of the Pliocene. Here we use the climatological fields derived from the results of the 15 PlioMIP climate models to force an offline ice sheet model. <br><br> We show that mPWP ice sheet reconstructions are highly dependent upon the forcing climatology used, with Greenland reconstructions ranging from an ice-free state to a near-modern ice sheet. An analysis of the surface albedo variability between the climate models over Greenland offers insights into the drivers of inter-model differences. As we demonstrate that the climate model dependency of our results is high, we highlight the necessity of data-based constraints of ice extent in developing our understanding of the mPWP Greenland ice sheet.http://www.clim-past.net/11/403/2015/cp-11-403-2015.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. M. Dolan S. J. Hunter D. J. Hill A. M. Haywood S. J. Koenig B. L. Otto-Bliesner A. Abe-Ouchi F. Bragg W.-L. Chan M. A. Chandler C. Contoux A. Jost Y. Kamae G. Lohmann D. J. Lunt G. Ramstein N. A. Rosenbloom L. Sohl C. Stepanek H. Ueda Q. Yan Z. Zhang |
spellingShingle |
A. M. Dolan S. J. Hunter D. J. Hill A. M. Haywood S. J. Koenig B. L. Otto-Bliesner A. Abe-Ouchi F. Bragg W.-L. Chan M. A. Chandler C. Contoux A. Jost Y. Kamae G. Lohmann D. J. Lunt G. Ramstein N. A. Rosenbloom L. Sohl C. Stepanek H. Ueda Q. Yan Z. Zhang Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm Period Climate of the Past |
author_facet |
A. M. Dolan S. J. Hunter D. J. Hill A. M. Haywood S. J. Koenig B. L. Otto-Bliesner A. Abe-Ouchi F. Bragg W.-L. Chan M. A. Chandler C. Contoux A. Jost Y. Kamae G. Lohmann D. J. Lunt G. Ramstein N. A. Rosenbloom L. Sohl C. Stepanek H. Ueda Q. Yan Z. Zhang |
author_sort |
A. M. Dolan |
title |
Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm Period |
title_short |
Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm Period |
title_full |
Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm Period |
title_fullStr |
Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm Period |
title_full_unstemmed |
Using results from the PlioMIP ensemble to investigate the Greenland Ice Sheet during the mid-Pliocene Warm Period |
title_sort |
using results from the pliomip ensemble to investigate the greenland ice sheet during the mid-pliocene warm period |
publisher |
Copernicus Publications |
series |
Climate of the Past |
issn |
1814-9324 1814-9332 |
publishDate |
2015-03-01 |
description |
During an interval of the Late Pliocene, referred to here as the
mid-Pliocene Warm Period (mPWP; 3.264 to 3.025 million years ago), global
mean temperature was similar to that predicted for the end of this century,
and atmospheric carbon dioxide concentrations were higher than
pre-industrial levels. Sea level was also higher than today, implying a
significant reduction in the extent of the ice sheets. Thus, the mPWP
provides a natural laboratory in which to investigate the long-term response
of the Earth's ice sheets and sea level in a warmer-than-present-day world.
<br><br>
At present, our understanding of the Greenland ice sheet during the mPWP is
generally based upon predictions using single climate and ice sheet models.
Therefore, it is essential that the model dependency of these results is
assessed. The Pliocene Model Intercomparison Project (PlioMIP) has brought
together nine international modelling groups to simulate the warm climate of
the Pliocene. Here we use the climatological fields derived from the
results of the 15 PlioMIP climate models to force an offline ice sheet
model.
<br><br>
We show that mPWP ice sheet reconstructions are highly dependent upon the
forcing climatology used, with Greenland reconstructions ranging from an
ice-free state to a near-modern ice sheet. An analysis of the surface albedo
variability between the climate models over Greenland offers insights into
the drivers of inter-model differences. As we demonstrate that the climate
model dependency of our results is high, we highlight the necessity of
data-based constraints of ice extent in developing our understanding of the
mPWP Greenland ice sheet. |
url |
http://www.clim-past.net/11/403/2015/cp-11-403-2015.pdf |
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