Navigation Links
Ancient global warming allowed greening of Antarctica
Date:6/18/2012

Ancient Antarctica was warmer and wetter than previously suspected, enough to support vegetation along its edges, according to a new study.

By examining the remnants of plant leaf wax found in sediment cores taken below the Ross Ice Shelf, scientists from the University of Southern California, Louisiana State University and NASA's Jet Propulsion Laboratory were able to determine that summer temperatures along the Antarctic coast 15 to 20 million years ago were 20 degrees Fahrenheit (11 degrees Celsius) warmer than they are today, reaching up to about 45 degrees Fahrenheit (7 degrees Celsius); with several times more precipitation.

This occurred during a period of global warming in the middle Miocene epoch that coincided with increased levels of atmospheric carbon dioxide.

"This is some of the first evidence of just how much warmer it was," said Sarah J. Feakins, an assistant professor of earth sciences at the USC Dornsife College of Letters, Arts and Sciences and lead author of a paper on the research published in Nature Geoscience on June 17.

Scientists began to suspect that high-latitude temperatures during the middle Miocene were warmer than previously believed when Sophie Warny, co-author of the Nature Geoscience paper, discovered large quantities of pollen and algae in sediment cores taken around Antarctica.

Fossils of plant life in Antarctica are difficult to come by because the movement of the massive ice sheets covering the landmass grinds and scrapes away the evidence.

"Deep sea cores are ideal to look for clues of past vegetation as the fossils deposited are protected from ice-sheet advances, but these are technically very difficult to acquire in the Antarctic and require international collaboration," said Warny, assistant professor of palynology at Louisiana State University.

"Ice cores can only go back about one million years," Feakins said. "Sediment cores allow us to go
'/>"/>

Contact: Robert Perkins
perkinsr@usc.edu
213-740-9226
University of Southern California
Source:Eurekalert

Page: 1 2

Related biology news :

1. Evaluation of microscopy techniques may help scientists to better understand ancient plants
2. Tongue analysis software uses ancient Chinese medicine to warn of disease
3. Like curry? New biological role identified for compound used in ancient medicine
4. Ancient giant turtle fossil revealed
5. Whale population size, dynamics determined based on ancient DNA
6. LSU research finds orangutans host ancient jumping genes
7. New coelacanth find rewrites history of the ancient fish
8. Ammonites found mini oases at ancient methane seeps
9. Ancient Egyptian cotton unveils secrets of domesticated crop evolution
10. Ancient whale species sheds new light on its modern relatives
11. Ancient civilizations reveal ways to manage fisheries for sustainability
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/29/2014)... Researching the safety of nanoparticles is all the rage. ... topic, examining the question of whether titanium dioxide nanoparticles ... into the body, whether carbon nanotubes from electronic products ... to be or whether nanoparticles in food can get ... Public interest is great, research funds are flowing – ...
(Date:10/29/2014)... decompose, their types and numbers of bugs and ... mean the difference between a closed case and ... using a more than $866,000 U.S. Department of ... these changing populations. The microbial communities may provide ... gender, race, socioeconomic relations and more, said Eric ...
(Date:10/29/2014)... of stem cell, those referred to as ,facultative, form ... apparently nothing that differentiates these cells from the others. ... retain the capacity to become stem cells again. This ... organ that hosts cells that stimulate tissue growth, thus ... of a transplant. Knowledge of the underlying mechanism ...
Breaking Biology News(10 mins):Nanosafety research: The quest for the gold standard 2Nanosafety research: The quest for the gold standard 3MSU partners with Detroit to investigate death scenes 2A mechanism that allows a differentiated cell to reactivate as a stem cell revealed 2
... new study of transfer RNA, a molecule that delivers amino ... ideas about the evolutionary history of protein synthesis., In the ... (reading the genetic blueprint for a protein, and adding a ... appear to have originated independently of one another. The new ...
... a devastating new wheat disease strain which could lead to ... in the United States, with funding from the Bill & ... undertake the research as part of the Durable Rust Resistance ... the fungus, wheat stem rust. World leaders in rust ...
... has been honored for his role in the development ... who suffer severe, life-threatening injuries in Iraq and Afghanistan. ... for Combat Casualty Care Award was presented to Stucky ... annual meeting in Florida. The ATACCC convention is the ...
Cached Biology News:Study reveals surprising details of the evolution of protein translation 2CSIRO enlisted to avert global wheat supply crisis 2UCSB chemistry professor receives top military award for life-saving gauze 2UCSB chemistry professor receives top military award for life-saving gauze 3
(Date:10/31/2014)... Fla. , Oct. 31, 2014  Tavistock ... owned by Tavistock Group, celebrated the groundbreaking of the ... Medical City. The 92,000-square-foot, three-story ... Central Florida designed specifically for ... in the heart of the 650-acre Lake Nona ...
(Date:10/30/2014)... Global polyvinyl chloride (PVC) demand registered a significant ... especially in North America and Europe. However, the global ... a growing trend. , The largest chunk of the ... segment. In 2013, the key PVC application spheres included ... film. Moreover, the PVC was consumed in the production ...
(Date:10/30/2014)... James Sherley says he has been working ... cell technology since his days as a principal investigator at ... late 1990’s. Sherley founded the ASCTC as a new ... the intellectual property developed in Sherley’s research over the years ... of Technology (MIT), and more recently as a senior scientist ...
(Date:10/30/2014)... Isis Pharmaceuticals, Inc. (NASDAQ: ISIS ), ... present a company overview at the Nomura Biotechnology Conference on ... Boston, MA. A live webcast ... Media" section of the Company,s website, www.isispharm.com .  A ... hours and will be archived for a limited time. ...
Breaking Biology Technology:GuideWell Innovation Center Groundbreaking Hosted by Tavistock Development Company at Lake Nona Medical City 2GuideWell Innovation Center Groundbreaking Hosted by Tavistock Development Company at Lake Nona Medical City 3Global Polyvinyl Chloride Demand Is on Upward Trend Now, Says Merchant Research & Consulting in Its Topical Study 2Global Polyvinyl Chloride Demand Is on Upward Trend Now, Says Merchant Research & Consulting in Its Topical Study 3Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 2Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 3Boston’s Adult Stem Cell Technology Center, LLC Introduces A New Technology for Monitoring Previously Elusive Adult Stem Cells 4Isis Pharmaceuticals to Present at the Nomura Biotechnology Conference 2
... Corporation,(OTC Bulletin Board: CONX), a worldwide developer and ... Test at the,American Diabetes Association,s 68th Scientific Sessions. ... - 9, 2008, at the Moscone Convention,Center in ... time the AspirinWorks test will be exhibited at,the ...
... Ongoing Live-Cell Research, MELVILLE, N.Y., June ... and Northwestern University,s Feinberg School of,Medicine announced ... imaging,center, establishing a partnership that brings improved ... for Nikon,product development. One of only three ...
... Therapeutics, a drug,and diagnostic company, today announces that ... 1st as Chief Operating Officer. At the next,meeting ... CEO (President du,Directoire)., Laurent Condomine, Chairman of ... Loic Maurel joining ExonHit Therapeutics. His,experience and track ...
Cached Biology Technology:Corgenix to Exhibit AspirinWorks(R) Test at ADA 2008 Meeting in San Francisco 2Corgenix to Exhibit AspirinWorks(R) Test at ADA 2008 Meeting in San Francisco 3Nikon Instruments Opens New Imaging Center at Northwestern University 2Nikon Instruments Opens New Imaging Center at Northwestern University 3Loic Maurel Joins Exonhit Therapeutics to Become CEO 2Loic Maurel Joins Exonhit Therapeutics to Become CEO 3Loic Maurel Joins Exonhit Therapeutics to Become CEO 4
The filter 605DF50 for the Molecular Imager FX is a band pass filter for ethidium bromide, SYPRO Red, SYPRO Ruby, Alexa Fluor 532 and 546, and Cy3 dyes when using the 635 nm laser....
The sample holders for gels are used to hold gels in place in the multi-sample tray I, which is used with Molecular Imager FX imaging systems....
... APO-DIRECT is a single-step staining method ... cells by flow cytometry. The kit contains ... apoptosis in cells including: positive and negative ... reaction and rinsing buffers for processing individual ...
... is specifically for electrofocusing. It ... is recommended for electrofocusing of ... or complexes that are subject ... sieving in polyacrylamide gels. Supplied ...
Biology Products: