HOME >> BIOLOGY >> NEWS
Abandoned penguin colonies may help refine Antarctic climate studies

ARLINGTON, Va.--A previously unnoticed cooling trend that persisted for a millennium caused enough ice to build up in Antarctica's Ross Sea that thousands of Adelie penguins abandoned their colonies beginning about 2,000 years ago, according to newly published research.

Using radiocarbon analyses of abandoned colonies on the Victoria Land coast of the Ross Sea, scientists believe that modern, ice-free conditions developed in the region only within roughly the past 1,000 years and that the present Adelie colonies on Ross Island, which are among the most numerous in the world, are likely no more than 500 years old.

Those techniques, they say, can also help to refine our understanding of climatic change on the southernmost continent

"We think the birds left the colonies when the southern Ross Sea was completely iced over in a cooling trend that very likely covered that region for probably a thousand years," said Steven D. Emslie, of the University of North Carolina at Wilmington. "That's never been known before from other climate records."

Scientists typically use chemical signatures in marine sediments, ice cores and other natural records to piece together a picture of what the Antarctic climate looked like thousands and even millions of years ago. But those records do not provide a highly defined or detailed picture of climate over shorter geological time scales.

"The evidence from these colonies can help refine those other records," said Emslie. "They are adding a higher resolution to the climatic record in Antarctica."

The National Science Foundation (NSF) funded Emslie's work, which was published recently in the journal Marine Ecology Progress Series. NSF is an independent federal agency that supports fundamental research and education across all fields of science and engineering, with an annual budget of nearly $5 billion.

Emslie said the evidence points to four conditions that suggests penguins once ne
'"/>

Contact: Peter West
pwest@nsf.gov
703-292-7761
National Science Foundation
8-Dec-2003


Page: 1 2 3

Related biology news :

1. Models Assess Remedial Actions On Abandoned Mine Lands In Colorado
2. Antarctic penguins thrive in ocean oases
3. Falklands penguins forage far enough from home to get into trouble
4. Giant icebergs, unprecedented ice conditions threaten Antarctic penguin colonies
5. Waddling is a good way to make up for short legs - at least for penguins, say UC Berkeley researchers
6. Cold water off Brazil might be causing Argentine penguin nest failures
7. Integrative approach to studying penguins, cockroaches and little hairy noses makes comparative biomechanics group at UC Berkeley the nations best
8. Scientists question reports of massive ant supercolonies in California and Europe
9. UCR entomologists report bee-dancing brings more food to honeybee colonies
10. New model of Alzheimers enzyme may help refine future treatments
11. DuPont and NREL to develop worlds first integrated bio-refinery

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


(Date:9/15/2018)... ... ... The first ever production picosecond-domain laser with a 785?nm wavelength was recently ... - often the colors most resistant to laser removal. , A clinical trial published ... for Laser Medicine and Surgery, Inc. (ASLMS) investigated the safety and efficacy of the ...
(Date:9/12/2018)... ... September 12, 2018 , ... JoVE, the leading producer ... support the professional development of academic librarians by sponsoring four award-winners to attend ... asked to submit successful strategies to increase collaboration among librarians and STEM faculty ...
(Date:9/7/2018)... ... September 06, 2018 , ... CTL Medical ... purchase its commercial spine business, which includes its complete portfolio of spine-related patents ... that result from it. The deal will make CTL Medical the world’s exclusive ...
Breaking Biology News(10 mins):
(Date:9/12/2018)... ... September 11, 2018 , ... Sterlitech Corporation, a global ... (FO) membranes from Fluid Technology Solutions (FTS H2O) to their offering of filtration ... from cellulose triacetate (CTA) material. The highly hydrophilic nature of the CTA FO ...
(Date:9/7/2018)... ... September 06, 2018 , ... The ... is a meeting of “The industry’s preeminent event on novel drug targets.” BellBrook ... powerful tools to study these emerging targets in a quest to find new ...
(Date:9/7/2018)... ... September 06, 2018 , ... Akadeum Life Sciences today ... his career as an executive and leader of numerous biotech companies. , He ... and biologics company acquired by Thompson Street Capital in St. Louis, MO. Prior ...
(Date:8/31/2018)... ... August 30, 2018 , ... Small, wireless and networked describes more than ... getting connected, too. Draper’s latest system is tiny in size, but is poised to ... factor in the new implant design is the growing awareness that disease often involves ...
Breaking Biology Technology:
Cached News: