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Title: Global Warming in Geologic Time

The notion is pervasive in the climate science community and in the public at large that the climate impacts of fossil fuel CO2 release will only persist for a few centuries. This conclusion has no bmore »asis in theory or models of the atmosphere / ocean carbon cycle, which we review here. The largest fraction of the CO2 recovery will take place on time scales of centuries, as CO2 invades the ocean, but a significant fraction of the fossil fuel CO2, ranging in published models in the literature from 20-60%, remains airborne for a thousand years or longer. Ultimate recovery takes place on time scales of hundreds of thousands of years, a geologic longevity typically associated in public perceptions with nuclear waste. The glacial / interglacial climate cycles demonstrate that ice sheets and sea level respond dramatically to millennial-timescale changes in climate forcing. There are also potential positive feedbacks in the carbon cycle, including methane hydrates in the ocean, and peat frozen in permafrost, that are most sensitive to the long tail of the fossil fuel CO2 in the atmosphere.« less
Title: Global Warming in Geologic Time
Authors:
Publication Date: 2008-02-27
OSTI Identifier: 987344
Other Number(s): Other: Global Warming in Geologic Time
Resource Type: Multimedia
Specific Type: Multimedia Presentation
Sponsoring Org: USDOE
Subject: 54 ENVIRONMENTAL SCIENCES ; CLIMATE SCIENCE ; IMPACT ; MODELS
Publisher: Fermilab Colloquia Online: 2000 to the Present Videos of Science Lecture and Presentations from the Colloquium Program at Fermi National Laboratory
Country of Publication: United States
Language: English
Run Time: 1:10:04
System Entry Date: 2018-01-01