Featured Research

from universities, journals, and other organizations

Antarctic Rocks Yield Clues About Global Change

Date:
March 12, 1998
Source:
University Of Maine
Summary:
Did it melt or not? Antarctic scientists, including a team in UMaine's Institute for Quaternary Studies and Dept. of Geological Sciences, have been debating that question for more than a decade when they look at the history of the south pole ice sheet as far back as three to four million years ago. The answer is important for predicting how Antarctica and the world's ocean levels might behave in a warmer global climate.

Did it melt or not? Antarctic scientists, including a team in UMaine's Institute for Quaternary Studies and Dept. of Geological Sciences, have been debating that question for more than a decade when they look at the history of the south pole ice sheet as far back as three to four million years ago. The answer is important for predicting how Antarctica and the world's ocean levels might behave in a warmer global climate.

Related Articles


In the Journal of Geology, (1997, vol. 105, p. 285-294), a UMaine team has published new evidence consistent with the view that the East Antarctic ice sheet remained stable during that period and did not melt as other researchers have suggested.

Co-authors Brenda Hall, George Denton and Daniel Lux are at UMaine and Christian Schluchter is with the University of Bern in Switzerland. Their work was funded by the National Science Foundation and the National Oceanic and Atmospheric Administration.

The team reached its conclusions by evaluating geologic evidence in an area known as the Dry Valleys. The area has been a Mecca for geologists because the valleys lack the ice and snow which cover most of the continent.

In Wright Valley, researchers surveyed rocks on the ground and excavated pits to determine the nature of underlying layers. Their results reflect past movement by glaciers which extend into the valley from surrounding mountains.

"Working conditions could be considered harsh," says Hall. "We live in tents in small camps of two to five people for 100 days each season. Temperatures range from -20 to +40 degrees F. Winds, which are sometimes very strong, blow almost constantly. However it is a very beautiful and unspoiled place to work."

Under Denton's leadership, the team continues to work in this area on a project to determine when a full-scale polar ice sheet first developed in Antarctica.


Story Source:

The above story is based on materials provided by University Of Maine. Note: Materials may be edited for content and length.


Cite This Page:

University Of Maine. "Antarctic Rocks Yield Clues About Global Change." ScienceDaily. ScienceDaily, 12 March 1998. <www.sciencedaily.com/releases/1998/03/980312075823.htm>.
University Of Maine. (1998, March 12). Antarctic Rocks Yield Clues About Global Change. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/1998/03/980312075823.htm
University Of Maine. "Antarctic Rocks Yield Clues About Global Change." ScienceDaily. www.sciencedaily.com/releases/1998/03/980312075823.htm (accessed December 20, 2014).

Share This


More From ScienceDaily



More Earth & Climate News

Saturday, December 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Lava on Track to Hit Hawaii Market

Raw: Lava on Track to Hit Hawaii Market

AP (Dec. 19, 2014) Lava from an active volcano on Hawaii's Big Island slowed slightly but stayed on track to hit a shopping center in the small town of Pahoa. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Birds Might Be Better Meteorologists Than Us

Birds Might Be Better Meteorologists Than Us

Newsy (Dec. 19, 2014) A new study suggests a certain type of bird was able to sense a tornado outbreak that moved through the U.S. a day before it hit. Video provided by Newsy
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Arctic Warming Twice As Fast As Rest Of Planet

Arctic Warming Twice As Fast As Rest Of Planet

Newsy (Dec. 18, 2014) The Arctic is warming twice as fast as the rest of the planet, thanks in part to something called feedback. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins