Navigation Links
Early Earth may have been prone to deep freezes, says CU-Boulder study
Date:12/5/2011

Two University of Colorado Boulder researchers who have adapted a three-dimensional, general circulation model of Earth's climate to a time some 2.8 billion years ago when the sun was significantly fainter than present think the planet may have been more prone to catastrophic glaciation than previously believed.

The new 3-D model of the Archean Eon on Earth that lasted from about 3.8 billion years to 2.5 billion years ago, incorporates interactions between the atmosphere, ocean, land, ice and hydrological cycles, said CU-Boulder doctoral student Eric Wolf of the atmospheric and oceanic sciences department. Wolf has been using the new climate model -- which is based on the Community Earth System Model maintained by the National Center for Atmospheric Research in Boulder -- in part to solve the "faint young sun paradox" that occurred several billion years ago when the sun's output was only 70 to 80 percent of that today but when geologic evidence shows the climate was as warm or warmer than now.

In the past, scientists have used several types of one-dimensional climate models -- none of which included clouds or dynamic sea ice -- in an attempt to understand the conditions on early Earth that kept it warm and hospitable for primitive life forms. But the 1-D model most commonly used by scientists fixes Earth's sea ice extent at one specific level through time despite periodic temperature fluctuations on the planet, said Wolf.

"The inclusion of dynamic sea ice makes it harder to keep the early Earth warm in our 3-D model," Wolf said. "Stable, global mean temperatures below 55 degrees Fahrenheit are not possible, as the system will slowly succumb to expanding sea ice and cooling temperatures. As sea ice expands, the planet surface becomes highly reflective and less solar energy is absorbed, temperatures cool, and sea ice continues to expand."

Wolf and CU-Boulder Professor Brian Toon are continuing to search for the heating
'/>"/>

Contact: Eric Wolf
eric.wolf@colorado.edu
303-735-3545
University of Colorado at Boulder
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Costly intervention program has no measurable effect on early retirement
2. Soybean adoption came early by many cultures, archaeologists say
3. Acinetobacter baumannii found growing in nearly half of infected patient rooms
4. The Michael J. Fox Foundation awards nearly $200,000 to develop novel drugs for Parkinsons disease
5. UT Southwestern biochemist receives new NIH Early Independence Award
6. Exercise before and during early pregnancy increases two beneficial proteins for mothers-to-be
7. Gender differences in blood pressure appears as early as adolescence
8. Mercury pollution in the Great Lakes region -- nearly forgotten, but not gone
9. JCI online early table of contents: Oct. 10, 2011
10. Carnegies Christoph Lepper receives prestigious Early Independence Award
11. Changes in brain function in early HIV infection: A reliable indicator of disease prognosis?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/7/2014)... 6, 2014 Leading Biometric companies aim ... security revolutionizing online transactions.  Companies in focus today are: NXT-ID, ... BABA ), Google Inc. (NASDAQ: GOOG ... (NASDAQ: EBAY ) and MasterCard Inc. (NYSE: MA) ... NXTDW), a biometric authentication company focused on the growing mobile ...
(Date:11/5/2014)... in the UTSA College of Sciences, is one ... receive a two-year $300,00 National Science Foundation (NSF) ... funding supports President Obama,s BRAIN Initiative, a federal ... that will demystify complex brain processes. , ... broken into the interactions of multiple components, each ...
(Date:11/4/2014)... – Temple University School of Medicine announced today ... an initiative funded by the Bill & Melinda ... of Obstetrics, Gynecology and Reproductive Sciences; and Vice ... University School of Medicine will pursue an innovative ... Blood Biomarkers to Assess Fetal Neurodevelopment.", Grand Challenges ...
Breaking Biology News(10 mins):Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6UTSA biology professor awarded $300,000 NSF grant for brain research 2UTSA biology professor awarded $300,000 NSF grant for brain research 3Temple University School of Medicine receives Grand Challenges Explorations grant 2
... at the University of Leicester may identify reasons underlying ... men. In her doctoral study, Cardiovascular Sciences student ... male predominance of AAA, with a particular emphasis on ... study will be showcased at the University of Leicester,s ...
... KNOXVILLE -- By examining 800,000-year-old polar ice, scientists increasingly ... ice melt and that carbon dioxide has become more abundant ... scientist Jrme Chappellaz has been examining ice cores collected from ... His studies on the interconnecting air spaces of old snow ...
... climate change, carbon dioxide, pollution and other human-related phenomena on ... isolated sources of pollution and other influences. Now, a ... published a report in the latest issue of the journal ... factors on the ocean and considers what the future might ...
Cached Biology News:Increased likelihood of male death from disease 2Scientist links increase in greenhouse gases to changes in ocean currents 2 WHOI scientist takes comprehensive look at human impacts on ocean chemistry 2 WHOI scientist takes comprehensive look at human impacts on ocean chemistry 3
(Date:11/21/2014)... Calif. (PRWEB) November 20, 2014 ... nonprofit, public policy research organization representing leading California ... firms, and PwC US today released ... in life sciences industry growth. The trend shows ... The 2015 California Biomedical Industry Report ...
(Date:11/21/2014)... Arkansas (PRWEB) November 20, 2014 ... Pinnacle Ozone Solutions, LLC (Pinnacle), and PCI, Inc., ... announced that they have been selected to provide ... of Fayetteville, Arkansas Paul R. Noland Wastewater Treatment. ... BlueInGreen’s patented HyDOZ® gas dissolution technology, ...
(Date:11/21/2014)... Texas (PRWEB) November 21, 2014 ... is a professional and in-depth research report on ... including its definition, classification, application, and industry chain ... covers the international market analysis, including China’s domestic ... macroeconomic environment & economic situation analysis. The report ...
(Date:11/21/2014)... and SAN DIEGO , Nov. ... today announced that President and CEO Marc Hedrick , M.D. ... DATE:   Thursday, December 4, 2014 TIME:    ... here or paste this URL into your browser,s ... that investors pre-register to save time and receive event updates. ...
Breaking Biology Technology:California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 2California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 3California Healthcare Institute and PwC Report Boom in California’s Biomedical Industry 4City of Fayetteville Leads Nation with Innovative Ozone Technology 2City of Fayetteville Leads Nation with Innovative Ozone Technology 3City of Fayetteville Leads Nation with Innovative Ozone Technology 4International Transformer Industry - Analysis on Applications, Development & Forecasts Now Available at ReportsnReports.com 2International Transformer Industry - Analysis on Applications, Development & Forecasts Now Available at ReportsnReports.com 3Cytori Therapeutics to Provide Corporate Update and Investor Presentation on December 4 through a Live, Interactive Webcast 2Cytori Therapeutics to Provide Corporate Update and Investor Presentation on December 4 through a Live, Interactive Webcast 3Cytori Therapeutics to Provide Corporate Update and Investor Presentation on December 4 through a Live, Interactive Webcast 4
... Reflects Full Scope of Integrated Global Services, ... Clinical,Trials today launches under a new name, Abt ... Associates Inc. The company will continue to,provide custom ... medical device and diagnostics industries,utilizing a team approach ...
... OF PRUSSIA, Pa., April 1, 2008 HighPoint Solutions,LLC, ... it,has been selected by a global biotechnology company to ... prepare for the company,s new,product launches and support its ... science companies continue to strive to create a holistic ...
... Increases 60% to $87.1 Million ... Increases 61% to $8.6 Million, XIAN, China, April ... Board: CBEH), (CBEH or the "Company"), an,energy company engaged ... finished oil products and the development, production and,distribution of ...
Cached Biology Technology:Abt Associates Clinical Trials Announces Name Change to Abt Bio-Pharma Solutions, Inc. 2HighPoint Solutions Selected by Global Biotechnology Company to Provide Master Data Management Solution 2China Bio Energy Reports Fiscal 2007 Financial Results 2China Bio Energy Reports Fiscal 2007 Financial Results 3China Bio Energy Reports Fiscal 2007 Financial Results 4China Bio Energy Reports Fiscal 2007 Financial Results 5China Bio Energy Reports Fiscal 2007 Financial Results 6China Bio Energy Reports Fiscal 2007 Financial Results 7China Bio Energy Reports Fiscal 2007 Financial Results 8China Bio Energy Reports Fiscal 2007 Financial Results 9China Bio Energy Reports Fiscal 2007 Financial Results 10China Bio Energy Reports Fiscal 2007 Financial Results 11
TACS Apoptotic DNA Laddering Kits are used to assay cells and tissues for apoptosis by...
RABBIT ANTI HUMAN APP (KP1 DOMAIN) Immunogen: Synthetic peptide composed of amino acids 292-312 from the KPI domain of human APP....
Anti-Goat HRP-AEC Cell & Tissue Staining Kit...
... culture systems provide an integrated ... for staining and imaging. Each ... preassembled with standard optical-quality coverslips ... entire system is provided sterile ...
Biology Products: