technology-news

Ice sheet in West Antarctica existed 20 million years earlier than believed

Washington, Sept. 5 : A new research has showed that an ice sheet located on West Antarctica existed 20 million years earlier than previously thought.


The findings indicate that ice sheets first grew on the West Antarctic subcontinent at the start of a global transition from warm greenhouse conditions to a cool icehouse climate 34 million years ago.

Previous computer simulations were unable to produce the amount of ice that geological records suggest existed at that time because neighbouring East Antarctica alone could not support it.

Earlier research published in 2009 and 2012 by the University of California, Santa Barbara, team showed that West Antarctica bedrock was much higher in elevation at the time of the global climate transition than it is today, with much of its land above sea level.

Lead author Douglas S. Wilson, a research geophysicist in UCSB's Department of Earth Science and Marine Science Institute and his team used a sophisticated numerical ice sheet model to support this view.

Using their new bedrock elevation map for the Antarctic continent, the researchers created a computer simulation of the initiation of the Antarctic ice sheets.

Unlike previous computer simulations of Antarctic glaciation, this research found the nascent Antarctic ice sheet included substantial ice on the subcontinent of West Antarctica. The modern West Antarctic Ice Sheet contains about 10 percent of the total ice on Antarctica and is similar in scale to the Greenland Ice Sheet.

The findings have been published in Geophysical Research Letters, a journal of the American Geophysical Union.

--ANI (Posted on 05-09-2013)

technology-news headlines

Cow manure has new antibiotic resistance genes: Study

Soon, futuristic gadget that uses voice to control all aspects of home

Missing Xenon gas may be resting in earth's belly: Study

Wireless speaker with light sensors, microphone

An 'upside-down planet' discovered

Google search, navigation preferred apps among drivers

Biofuels from corn less beneficial than reported: Study

Smart cup that delivers coffee, news too!

In a first, stem cells cloned from human skin

Bulletproof vests from stem cells?

App to protect your kids' privacy on social media

Watch out for muggers while wearing Google Glass

Quick Links: Goa | Munnar | Pondicherry | Free Yearly Horoscope '2014

Comments

Your e-mail:


Your Full Name:


Type verification image:
verification image, type it in the box

Message:

Back to Top