HOME >> BIOLOGY >> NEWS
Ancient climate change may portend toasty future

Stanford, CA -- Scientists, including Ken Caldeira of the Carnegie Institutions Department of Global Ecology, have found that the Earths global warming, 55 million years ago, may have resulted from the climates high sensitivity to a long-term release of carbon. This finding contradicts the position held by many climate-change skeptics that the Earth system is resilient to such emissions. The work, led by Mark Pagani of Yale University, is published in the December 8, 2006, issue of Science magazine.

For some years scientists have known that an ancient global warming event, called the Paleocene-Eocene Thermal Maximum (PETM) beginning about 55 million years ago, was caused by a massive release of carbon. The geologic record shows that the ensuing greenhouse effect heated the planet by about 9 F (5 C), on average, in less than 10,000 years. The temperature increase lasted 170,000 years and caused profound changes to the worlds rainfall patterns, made the oceans acidic, and affected oceanic and terrestrial plant and animal life, including spawning the rise of our modern primate ancestors. But understanding just how much carbon was responsible for the temperature increase and where it came from remains elusive.

The new calculations used data from carbon found in fossils of ancient land plants and tiny marine organisms known as plankton. "We can tell that the amount of carbon released to the atmosphere and ocean was more or less the same as what is available today as coal, oil, and gas," Caldeira explained. "The carbon heated up the Earth for over 100,000 years. If the climate was as insensitive to CO2 as the climate skeptics claim, there would be no way to make the Earth so warm for so long."

The source of this ancient carbon is still a mystery. It might have come from massive fires burning coal and other ancient plant material, or it could have come from "burps" of methane from the continental shelves.

"By examining fossil
'"/>

Contact: Ken Caldeira
kcaldeira@globalecology.stanford.edu
650-704-7212
Carnegie Institution
7-Dec-2006


Page: 1 2 3

Related biology news :

1. Ancient retrovirus sheds light on modern pandemic
2. Ancient Etruscans were immigrants from Anatolia, or what is now Turkey
3. Ancient DNA traces the woolly mammoths disappearance
4. Ancient amphibians evolved a bite before migrating to dry land
5. Ancient T. rex and mastodon protein fragments discovered, sequenced
6. Ancient coral reef tells the history of Kenyas soil erosion
7. Ancient genes used to produce salt-tolerant wheat
8. Ancient ape ruled out of mans ancestral line
9. Ancient predator had strongest bite of any fish, rivaling bite of large alligators and T. rex
10. Ancient birds flew on all-fours
11. Ancient raptors likely feasted on early man, study suggests

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/9/2019)... ... ... With a demand in healthcare to lower unneeded emergency room visits and provide ... in the coming years, according to a new report on the industry by market ... is a detailed look at the current state of these healthcare outlets, including the ...
(Date:8/6/2019)... Calif. (PRWEB) , ... August 05, 2019 , ... Keck ... the KGI School of Pharmacy and Health Sciences (SPHS). , “Dean Zdanowicz is highly ... Board of Trustees Chairman Jim Widergren. “He is a great choice to build on ...
(Date:8/4/2019)... ... August 02, 2019 , ... Stay on top of current hot ... food industries. Access to all webinars is free, so be sure to register today ... , Visit http://www.xtalks.com to see our upcoming webinars: , CLINICAL OPERATIONS , ...
Breaking Biology News(10 mins):
(Date:7/9/2019)... MOINES, Iowa (PRWEB) , ... July 08, 2019 , ... ... Des Moines, Iowa, the National Corn Growers Association (NCGA) announced the winners ... technology to improve a product or process using field corn to produce biobased materials. ...
(Date:6/18/2019)... ... , ... Personalized Stem Cells, Inc (“PSC”), a human adipose-derived stem ... use of a person’s own adipose-derived stem cells to treat their osteoarthritis. The first ... This IND is the first of several planned clinical trials which will enable qualified ...
(Date:6/11/2019)... ROANOKE, Va. (PRWEB) , ... June 11, 2019 ... ... for microlearning engagement, and Carilion Clinic, a national leader in opioid treatment, announced ... in virtual care. , Mytonomy recently deployed its virtual care platform ...
(Date:5/31/2019)... ... May 29, 2019 , ... ... applications from the USPTO providing proprietary interest to our methodology, processes, and ... DISORDER DIAGNOSIS AND TREATMENT… extends Somnology’s IP rights including our proprietary sleep ...
Breaking Biology Technology:
Cached News: