U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights


Simulating Earth's Last Great Global Warming Event
Published: July 20, 2009
Posted: July 27, 2009

About 14,500 years ago Greenland's temperature increased by 15 degrees C over a period of a century or so, the last great global warming event. DOE- and NSF-funded scientists have completed the first computer simulation of this event using the state-of-art Community Climate System Model, CCSM3 climate model, and the Jaguar supercomputer at Oak-Ridge National Laboratory by modeling events from 22,000 to 14,000 years ago. The model reproduces several major features of the deglacial climate evolution, suggesting a good agreement in climate sensitivity between the model and observations. The Liu et al. study initiates a new era of paleoclimate modeling based on astronomical theory, ice-sheet reconstructions, and the history of greenhouse gas concentrations. It offers the unique possibility to study the full spatiotemporal behavior of climate change, including the mechanisms of abrupt climate change, and to directly compare the resulting temporal features with paleoclimate data, for example, from sediment cores and ice cores. Climate models, together with high performance computing resources like those provided by DOE, are tools to promote our understanding of the climate system and predict its future evolution.

Reference: Z. Liu, B. Otto-Bliesner, F. He, E. Brady, P. Clark, J. Lynch-Steiglitz, A. Carlson, W. Curry, E. Brook, R. Jacob, D. Erickson, J. Kutzbach, J. Cheng, 2009: Transient simulation of deglacial Climate Evolution with a new mechanism for Bolling-Allerod warming. Science, 325, 310(2009).

Contact: Anjuli Bamzai, SC-23.1, (301) 903-0294
Topic Areas:

  • Research Area: Earth and Environmental Systems Modeling
  • Cross-Cutting: Scientific Computing and SciDAC

Division: SC-23.1 Climate and Environmental Sciences Division, BER

 

BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Aug 24, 2019
New Approach for Studying How Microbes Influence Their Environment
A diverse group of scientists suggests a common framework and targeting of known microbial processes [more...]

Aug 08, 2019
Nutrient-Hungry Peatland Microbes Reduce Carbon Loss Under Warmer Conditions
Enzyme production in peatlands reduces carbon lost to respiration under future high temperatures. [more...]

Aug 05, 2019
Amazon Forest Response to CO2 Fertilization Dependent on Plant Phosphorus Acquisition
AmazonFACE Model Intercomparison. The Science Plant growth is dependent on the availabi [more...]

Jul 29, 2019
A Slippery Slope: Soil Carbon Destabilization
Carbon gain or loss depends on the balance between competing biological, chemical, and physical reac [more...]

Jul 15, 2019
Field Evaluation of Gas Analyzers for Measuring Ecosystem Fluxes
How gas analyzer type and correction method impact measured fluxes. The Science A side- [more...]

List all highlights (possible long download time)