Trakar
Penultimate Amazing
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- Oct 20, 2007
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Earth's Hot Past: Prologue to Future Climate?National Science Foundation
http://www.nsf.gov/news/news_summ.jsp?cntn_id=118363&WT.mc_id=USNSF_51&WT.mc_ev=click
http://www.nsf.gov/news/news_summ.jsp?cntn_id=118363&WT.mc_id=USNSF_51&WT.mc_ev=click
excerpt:
View a video interview with Jeff Kiehl of UCAR.
The magnitude of climate change during Earth's deep past suggests that future temperatures may eventually rise far more than projected if society continues its pace of emitting greenhouse gases, a new analysis concludes.
The study, by National Center for Atmospheric Research (NCAR) scientist Jeffrey Kiehl, will appear as a "Perspectives" article in this week's issue of the journal Science.
The work was funded by the National Science Foundation (NSF), NCAR's sponsor.
Building on recent research, the study examines the relationship between global temperatures and high levels of carbon dioxide in the atmosphere tens of millions of years ago.
It warns that, if carbon dioxide emissions continue at their current rate through the end of this century, atmospheric concentrations of the greenhouse gas will reach levels that existed about 30 million to 100 million years ago.
Global temperatures then averaged about 29 degrees Fahrenheit (16 degrees Celsius) above pre-industrial levels...