Last Glacial Maximum and Holocene Climate in CCSM3
Bette L. Otto-Bliesner,Esther C. Brady,Gabriel Clauzet,Robert A. Tomas,Samuel Levis,Zav Kothavala +5 more
TLDR
In this paper, the climate sensitivity of the Community Climate System Model version 3 (CCSM3) is studied for two past climate forcings, the Last Glacial Maximum (LGM) and the mid-Holocene.Abstract:
The climate sensitivity of the Community Climate System Model version 3 (CCSM3) is studied for two past climate forcings, the Last Glacial Maximum (LGM) and the mid-Holocene. The LGM, approximately 21 000 yr ago, is a glacial period with large changes in the greenhouse gases, sea level, and ice sheets. The mid-Holocene, approximately 6000 yr ago, occurred during the current interglacial with primary changes in the seasonal solar irradiance. The LGM CCSM3 simulation has a global cooling of 4.5°C compared to preindustrial (PI) conditions with amplification of this cooling at high latitudes and over the continental ice sheets present at LGM. Tropical sea surface temperature (SST) cools by 1.7°C and tropical land temperature cools by 2.6°C on average. Simulations with the CCSM3 slab ocean model suggest that about half of the global cooling is explained by the reduced LGM concentration of atmospheric CO2 (∼50% of present-day concentrations). There is an increase in the Antarctic Circumpolar Current an...read more
Citations
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The Community Climate System Model Version 3 (CCSM3)
William D. Collins,Cecilia M. Bitz,Maurice L. Blackmon,Gordon B. Bonan,Christopher S. Bretherton,James A. Carton,Ping Chang,Scott C. Doney,James J. Hack,Tom Henderson,Jeffrey T. Kiehl,William G. Large,Daniel S. McKenna,Benjamin D. Santer,Richard D. Smith +14 more
TL;DR: The Community Climate System Model version 3 (CCSM3) as discussed by the authors is a coupled climate model with components representing the atmosphere, ocean, sea ice, and land surface connected by a flux coupler.
Journal ArticleDOI
The use of the multi-model ensemble in probabilistic climate projections
Claudia Tebaldi,Reto Knutti +1 more
TL;DR: The motivation for using multi-model ensembles, the methodologies published so far and their results for regional temperature projections are outlined, and the challenges in interpreting multi- model results are discussed.
Journal ArticleDOI
Mid- to Late Holocene climate change: an overview
Heinz Wanner,Jürg Beer,Jonathan Butikofer,Thomas J. Crowley,Ulrich Cubasch,Jacqueline Flückiger,Hugues Goosse,Martin Grosjean,Fortunat Joos,Jed O. Kaplan,Marcel Küttel,Simon A. Müller,I. Colin Prentice,Olga Solomina,Thomas F. Stocker,Pavel E. Tarasov,Mayke Wagner,Martin Widmann +17 more
TL;DR: The authors used selected proxy-based reconstructions of different climate variables, together with state-of-the-art time series of natural forcings (orbital variations, solar activity variations, large tropical volcanic eruptions, land cover and greenhouse gases), underpinned by results from GCMs and Earth System Models of Intermediate Complexity (EMICs), to establish a comprehensive explanatory framework for climate changes from the mid-Holocene (MH) to pre-industrial time.
Journal ArticleDOI
Results of PMIP2 coupled simulations of the Mid-Holocene and Last Glacial Maximum - Part 1: experiments and large-scale features
Pascale Braconnot,Bette L. Otto-Bliesner,Sandy P. Harrison,Sylvie Joussaume,J.-Y. Peterchmitt,Ayako Abe-Ouchi,Michel Crucifix,Michel Crucifix,E. Driesschaert,Thierry Fichefet,Chris Hewitt,Masa Kageyama,A. Kitoh,Alexandre Laîné,Marie-France Loutre,Olivier Marti,Ute Merkel,Gilles Ramstein,Paul J. Valdes,S. L. Weber,Yongqiang Yu,Yan Zhao +21 more
TL;DR: In this paper, a set of coupled ocean-atmosphere simulations using state-of-the-art climate models is presented for the Last Glacial Maximum and the Mid-Holocene through the second phase of the Paleoclimate Modeling Intercomparison Project (PMIP2).
Journal ArticleDOI
Transient Simulation of Last Deglaciation with a New Mechanism for Bølling-Allerød Warming
Zhengyu Liu,Bette L. Otto-Bliesner,Feng He,Esther C. Brady,Robert A. Tomas,Peter U. Clark,Anders E. Carlson,Jean Lynch-Stieglitz,William B Curry,Edward J. Brook,David J. Erickson,Robert Jacob,John E. Kutzbach,Jun Cheng,Jun Cheng +14 more
TL;DR: The first synchronously coupled atmosphere-ocean general circulation model simulation from the Last Glacial Maximum to the Bølling-Allerød (BA) warming reproduces several major features of the deglacial climate evolution, suggesting a good agreement in climate sensitivity between the model and observations.
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TL;DR: The Community Climate System Model version 3 (CCSM3) as discussed by the authors is a coupled climate model with components representing the atmosphere, ocean, sea ice, and land surface connected by a flux coupler.
Journal ArticleDOI
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