Last Glacial Maximum and Holocene Climate in CCSM3

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...

[1]  S. Philander,et al.  The climate of the Last Glacial Maximum: Results from a coupled atmosphere-ocean general circulation model , 1999 .

[2]  M. Maslin,et al.  Glacial North Atlantic: Sea-surface conditions reconstructed by GLAMAP 2000 , 2003 .

[3]  W. Collins,et al.  The Formulation and Atmospheric Simulation of the Community Atmosphere Model Version 3 (CAM3) , 2006 .

[4]  W. Collins,et al.  The Formulation and Atmospheric Simulation of the Community Atmosphere Model: CAM3 , 2005 .

[5]  R. Gersonde,et al.  Sea-surface temperature and sea ice distribution of the Southern Ocean at the EPILOG Last Glacial Maximum—a circum-Antarctic view based on siliceous microfossil records , 2005 .

[6]  E. Boyle,et al.  Deep Circulation of the North Atlantic over the Last 200,000 Years: Geochemical Evidence , 1982, Science.

[7]  R. Stouffer,et al.  The effect of ocean dynamics in a coupled GCM simulation of the Last Glacial Maximum , 2003 .

[8]  Paleoceanography. , 2021, Science.

[9]  J. Lerner,et al.  AO/NAO response to climate change: 2. Relative importance of low‐ and high‐latitude temperature changes , 2005 .

[10]  A. Kitoh,et al.  A simulation of the Last Glacial Maximum with a coupled atmosphere‐ocean GCM , 2001 .

[11]  Stauffer,et al.  Variations in atmospheric N2O concentration during abrupt climatic changes , 1999, Science.

[12]  William H. Lipscomb,et al.  Scientific description of the sea ice component in the Community Climate System Model , 2004 .

[13]  C. Shields,et al.  Modeling El Niño and its tropical teleconnections during the last glacial‐interglacial cycle , 2003 .

[14]  K. Shine.  Radiative Forcing of Climate Change , 2000 .

[15]  T. Stocker,et al.  Atmospheric CO2 concentrations over the last glacial termination. , 2001, Science.

[16]  Cohmap Members.  Climatic changes of the last 18,000 years: observations and model simulations. , 1988, Science.

[17]  A. Broccoli,et al.  In Search of Paleo-ENSO , 2004, Science.

[18]  Caspar M. Ammann,et al.  Climate Sensitivity of Moderate- and Low-Resolution Versions of CCSM3 to Preindustrial Forcings , 2006 .

[19]  D. Bromwich,et al.  Polar MM5 Simulations of the Winter Climate of the Laurentide Ice Sheet at the LGM , 2004 .

[20]  K. Taylor,et al.  The Community Climate System Model , 2001 .

[21]  E. Yu,et al.  Similar rates of modern and last-glacial ocean thermohaline circulation inferred from radiochemical data , 1996, Nature.

[22]  R. Röthlisberger,et al.  An Oceanic Cold Reversal During the Last Deglaciation , 2001, Science.

[23]  André Berger,et al.  Long-Term Variations of Caloric Insolation Resulting from the Earth's Orbital Elements , 1978, Quaternary Research.

[24]  Mark B. Abbott,et al.  An ;15,000-Year Record of El Nino—Driven Alluviation in Southwestern Ecuador , 1999 .

[25]  Frank O. Bryan,et al.  What sets the mean transport through Drake Passage , 2001 .

[26]  W. R. Peltier,et al.  The climate of the Earth at Last Glacial Maximum: statistical equilibrium state and a mode of internal variability , 2004 .

[27]  Seong-Joong Kim,et al.  A coupled climate model simulation of the Last Glacial Maximum, Part 2: approach to equilibrium , 2003 .

[28]  R. Dickinson,et al.  The Community Land Model and Its Climate Statistics as a Component of the Community Climate System Model , 2006 .

[29]  W. Peltier.  GLOBAL GLACIAL ISOSTASY AND THE SURFACE OF THE ICE-AGE EARTH: The ICE-5G (VM2) Model and GRACE , 2004 .

[30]  A. T. Grove,et al.  Environmental and climatic implications of late Quaternary lake-level fluctuations in Africa , 1976, Nature.

[31]  C. Hewitt,et al.  Radiative forcing and response of a GCM to ice age boundary conditions: cloud feedback and climate sensitivity , 1997 .

[32]  A. Timmermann,et al.  Modeling evidence for enhanced El Nino-Southern Oscillation amplitude during the Last Glacial Maximum , 2004 .

[33]  William B. Curry,et al.  Weaker Gulf Stream in the Florida Straits during the Last Glacial Maximum , 1999, Nature.

[34]  S. Levitus.  Climatological Atlas of the World Ocean , 1982 .

[35]  Sandy P. Harrison,et al.  Climate change and Arctic ecosystems: 1. Vegetation changes north of 55°N between the last glacial maximum, mid‐Holocene, and present , 2003 .

[36]  B. Otto‐Bliesner,et al.  The Sensitivity of the Hadley Circulation to Past and Future Forcings in Two Climate Models , 2004 .

[37]  J. McManus,et al.  Collapse and rapid resumption of Atlantic meridional circulation linked to deglacial climate changes , 2004, Nature.

[38]  A. Timmermann,et al.  Surface temperature control in the North and tropical Pacific during the last glacial maximum , 2004 .

[39]  T. Marchitto,et al.  Paired benthic foraminiferal Cd/Ca and Zn/Ca evidence for a greatly increased presence of Southern Ocean Water in the glacial North Atlantic , 2002 .

[40]  James J. Hack,et al.  The Climate Sensitivity of the Community Climate System Model Version 3 (CCSM3) , 2006 .

[41]  Stephen Barker,et al.  Planktonic foraminiferal Mg/Ca as a proxy for past oceanic temperatures: a methodological overview and data compilation for the Last Glacial Maximum , 2005 .

[42]  B. Otto‐Bliesner,et al.  Tropical Pacific Variability in the NCAR Climate System Model , 2001 .

[43]  D. Jolly,et al.  Mid‐Holocene and glacial‐maximum vegetation geography of the northern continents and Africa , 2000 .

[44]  Sandy P. Harrison,et al.  Monsoon changes for 6000 years ago: Results of 18 simulations from the Paleoclimate Modeling Intercomparison Project (PMIP) , 1999 .

[45]  K. Shine.  Radiative Forcing of Climate Change , 2000 .

[46]  N. Slowey,et al.  Enhanced ventilation of the North Atlantic subtropical gyre thermocline during the last glaciation , 1992, Nature.

[47]  Interannual Variability of Patterns of Atmospheric Mass Distribution , 2005 .

[48]  G. P. Lohmann,et al.  Carbon Isotopic Changes in Benthic Foraminifera from the Western South Atlantic: Reconstruction of Glacial Abyssal Circulation Patterns , 1982, Quaternary Research.

[49]  J. Houghton,et al.  Climate change 2001 : the scientific basis , 2001 .

[50]  Adam S. Phillips,et al.  Tropical Pacific and Atlantic Climate Variability in CCSM3 , 2006 .

[51]  J. Kutzbach,et al.  Southern Ocean sea‐ice control of the glacial North Atlantic thermohaline circulation , 2003 .

[52]  D. Gong,et al.  Antarctic oscillation: concept and applications , 1998 .

[53]  W. Collins,et al.  The Community Climate System Model Version 3 (CCSM3) , 2006 .

[54]  M. Sarnthein,et al.  Past extent of sea ice in the northern North Atlantic inferred from foraminiferal paleotemperature estimates , 2003 .

[55]  James W. Hurrell,et al.  Detection and Attribution of Twentieth-Century Northern and Southern African Rainfall Change , 2006 .

[56]  Sandy P. Harrison,et al.  Dust sources and deposition during the last glacial maximum and current climate: A comparison of model results with paleodata from ice cores and marine sediments , 1999 .

[57]  J. Duplessy,et al.  Deep water formation in the North Atlantic Ocean during the last ice age , 1980, Nature.

[58]  A. Kitoh,et al.  Tropical Pacific climate at the mid-Holocene and the Last Glacial Maximum simulated by a coupled ocean-atmosphere general circulation model , 2002 .

[59]  Frank O. Bryan,et al.  Ocean Chlorofluorocarbon and Heat Uptake during the Twentieth Century in the CCSM3 , 2006 .

[60]  J. Kutzbach,et al.  A Simulation of the Last Glacial Maximum climate using the NCAR-CCSM , 2003 .

[61]  G. Bonan,et al.  Soil feedback drives the mid-Holocene North African monsoon northward in fully coupled CCSM2 simulations with a dynamic vegetation model , 2004 .

[62]  M. Kageyama,et al.  Comparing proxies for the reconstruction of LGM sea-surface conditions in the northern North Atlantic , 2006 .

[63]  Alan C. Mix,et al.  Foraminiferal faunal estimates of paleotemperature: Circumventing the No‐analog problem yields cool Ice Age tropics , 1999 .

[64]  H. Tokuyama,et al.  Trace element abundances in basalts of Nauru Basin , 1980, Nature.

[65]  C. Hillaire‐Marcel,et al.  Reconstruction of sea-surface conditions at middle to high latitudes of the Northern Hemisphere during the Last Glacial Maximum (LGM) based on dinoflagellate cyst assemblages , 2005 .

[66]  W. Peltier,et al.  Dynamics of the ice-age Earth: Solid mechanics and fluid mechanics , 2002 .

[67]  B. Stauffer,et al.  Changes in the atmospheric CH4 gradient between Greenland and Antarctica during the Last Glacial and the transition to the Holocene , 2000 .

[68]  W. Collins,et al.  The Community Climate System Model: CCSM3 , 2004 .

[69]  Frank O. Bryan,et al.  Response of the North Atlantic Thermohaline Circulation and Ventilation to Increasing Carbon Dioxide in CCSM3 , 2006 .

[70]  W. Peltier,et al.  Ice Age Paleotopography , 1994, Science.

[71]  C. Wunsch.  Determining paleoceanographic circulations, with emphasis on the Last Glacial Maximum , 2003 .

[72]  A. Mcintyre,et al.  Seasonal reconstructions of the earth's surface at the last glacial maximum , 1981 .

[73]  I. Prentice,et al.  Biome reconstruction from pollen and plant macrofossil data for Africa and the Arabian peninsula at 0 and 6000 years , 1998 .

[74]  S. Goldstein,et al.  Reduced North Atlantic Deep Water flux to the glacial Southern Ocean inferred from neodymium isotope ratios , 2000, Nature.

[75]  Zhongwei Yan,et al.  The last 140 ka in the Afro-Asian arid/semi-arid transitional zone , 1994 .

[76]  J. Kutzbach,et al.  The Influence of Changing Orbital Parameters and Surface Boundary Conditions on Climate Simulations for the Past 18 000 Years , 1986 .

[77]  William H. Lipscomb,et al.  Influence of the Sea Ice Thickness Distribution on Polar Climate in CCSM3 , 2006 .

[78]  E. Cook,et al.  Variability in the El Niño-Southern Oscillation Through a Glacial-Interglacial Cycle , 2001, Science.

[79]  F. Cottier,et al.  Linkages between salinity and brine channel distribution in young sea ice , 1999 .

[80]  K. Mosegaard,et al.  Past temperatures directly from the greenland ice sheet , 1998, Science.

[81]  D. Schrag,et al.  The Salinity, Temperature, and δ18O of the Glacial Deep Ocean , 2002, Science.

[82]  G. Danabasoglu,et al.  Ocean Chlorofluorocarbon and Heat Uptake During the 20 th Century in the CCSM 3 , 2005 .

[83]  F. Bryan.  Climate Drift in a Multicentury Integration of the NCAR Climate System Model , 1998 .

[84]  J. Lynch‐Stieglitz,et al.  Global ocean response to orbital forcing in the Holocene , 2003 .