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:12/3/2014)... , Dec. 2, 2014 As part of ... Inception Technologies is pleased to announce the release of ... customers to collect the workforce data that they need. ... have been left by existing readers. Many such devices ... connectivity and modern technology. Older models force users to ...
(Date:11/21/2014)... 20, 2014 Strict laws against distracted driving ... the North American and European automotive sector towards gesture ... recognition systems that are intuitive and able to retrieve ... industry. New analysis from Frost & ... in Europe and ...
(Date:11/18/2014)... 18, 2014  The Secure Identity & Biometrics ... jointly announce the formation of The Airport Entry ... Identity and Biometric Entry and Exit Solutions ... official support from BORDERPOL, the international non-profit organization ... provide expertise regarding border security, traveler and migration ...
Breaking Biology News(10 mins):Inception Technologies to Release New Biometric Reader 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 2Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 3Gesture Recognition Intensifies with the Rise of In-car Smartphone Integration, Says Frost & Sullivan 4Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3
... , This release is available in ... be planted in "bee pastures," floral havens created as ... to produce successive generations of healthy young bees. ... perhaps only a half-acre each--easy to tend, according to ...
... sector and an Austrian research institute are chipping in ... public biological databases in the world. Although the majority ... Foundation, The Arabidopsis Information Resource (TAIR) database is now ... researchers worldwide use it monthly to study everything from ...
... , The growing amount of human noise pollution in the ... to their death, according to new research from a UK-led ... for weeks at sea, baby tropical fish rely on natural ... and thrive. However, the researchers found that short exposure ...
Cached Biology News:Bee pastures may help pollinators prosper 2Private support helps public plant research 2Marine Pied Piper leads Nemo astray 2
(Date:12/24/2014)... , Dec. 23, 2014 Sigma-Aldrich ... that the waiting period under the Hart-Scott-Rodino Antitrust ... acquisition expired on December 22, 2014, thereby completing ... requirement for the acquisition of the Company by ... antitrust clearance satisfies another condition to closing the ...
(Date:12/22/2014)... (PRWEB) December 22, 2014 The ... global leader of technical training across the life sciences ... Data Management (SCDM) to provide the organization's members ... programs —providing access to the more than 350 sessions ... members with 10% off when registering for a ...
(Date:12/22/2014)... , Dec. 22, 2014  Alternative Energy ... that it has signed a letter of intent ... has developed and patented a nanotechnology-based development platform ... products that enable rapid on-site collection and testing ... and health issues in an immediate, non-invasive and ...
(Date:12/22/2014)... The American Journal of ... research, reviews and editorials addressing developments and pathways ... published a provocative article exploring the role of ... potential treatment of prostate cancer. , The ... the possibility that there could be a connection ...
Breaking Biology Technology:Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 3CfPIE Announces Partnership with the Society for Clinical Data Management 2CfPIE Announces Partnership with the Society for Clinical Data Management 3ALNE Announces Intention To Acquire BioTechPharma 2Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 2Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 3Prostate Cancer Experts Dissect the Role of Follicle-stimulating Hormone in the Development, Progression and Potential Treatment of Prostate Cancer 4
... assets to stimulate growth , ,MADISON - More than ... Tuesday to hear Madison Mayor Dave Cieslewiczs plan for the ... a model for a forward economy, a 38-page ... as a vision for how Madisons public and private sectors ...
... RedPrairie Corporation Friday announced the availability ... services designed to ensure major retailer and Department of ... to meet each companys RFID implementation environment and schedule. ... foundation for the three others, is RFID Data Manager. ...
... bacteria that causes tuberculosis (TB) and leprosy are notoriously ... held in check for the past 50 years by ... therapy. , ,Now, however, a new chink has been ... diseases difficult to treat. The discovery, reported today (May ...
Cached Biology Technology:Madisons visionary plan for a healthy economy 2Madisons visionary plan for a healthy economy 3RedPrairie announces RFID 360 compliance software 2UW discovery could lead to new TB treatments 2UW discovery could lead to new TB treatments 3
... duty stainless-steel shaker flask clips, purpose-designed to ... All clips are equipped with a ... also include a bottom retainer spring, and ... of expensive glassware. Clips include the ...
RABBIT ANTI HUMAN ALPHA-2-ANTIPLASMIN...
... Red Taq DNA Polymerase is a thermostable ... activity in primer extension and other molecular ... dye which provides easy and quick identification ... and allows confirmation of complete mixing. The ...
RNA oligomers from 10 to 50 bases purified by PAGE and MS-checked. RNAs are supplied dried and fully deprotected....
Biology Products: