World Bulletin / News Desk
Scientists have produced the first three dimensional map of the surface beneath Antarctic sea ice, helping them better understand the impact of climate change on Antarctica.
The team of scientists from eight countries have used a robot submarine to chart a frozen and inverted world of mountains and valleys, allowing accurate measurements of the crucial thickness of Antarctic sea ice.
By combining the data with airborne measures of surface ice and snow, scientists can now accurately measure changes in ice thickness and better understand the affects of global warming.
"The ice thickness is regarded amongst climate scientists as the holy grail of determining changes in the system," Antarctic marine glaciologist Jan Lieser told Reuters.
"If we can determine the change in the thickness of the sea ice we can estimate the rate of change that is due to global warming."
Scientists have ice thickness data for the Arctic region dating back to the 1950s, allowing for analysis of changes in the Arctic Ocean, but similar data has been unavailable for the ice around the frozen Southern continent.
Lieser, who is aboard an Australian icebreaker in Antarctic waters, is part of the Sea Ice Physics and Ecosystem Experiment project, involving scientists from Australia, Belgium, Canada, France, Germany, Japan, New Zealand and the United States.
They are using a free-swimming robot submarine, which moves about 20 meters (65 feet) below the ice and travels in a grid pattern, using multi-beam sonar to measure the underside of the ice.
Lieser said changes in sea ice thickness affects the formation of cold, salty Antarctic bottom water that drives global ocean currents and is crucial for sea life, from phytoplankton and krill to whales.
"We can actually get a full 3D image of what we are measuring. It's never been done before and that's really exciting," Lieser added.
The results will help set a baseline to establish how climate change affects Antarctic sea ice. Scientists will also be able to examine how changes to sea ice affect the ecosystem.
Similar tests in 2007 used only airborne equipment and produced only two dimensional maps, which are less accurate.
New supermarket features no human cashiers, scheduled to open to public in early 2017
The organization cited missing letters in some words or mistakes in verses and punctuation in free Quran apps
The intervention in a Chinese company’s bid to buy German chip maker, Aixtron, comes after Chinese companies have spent billions to acquire technology in Europe and the United States.
Malware designed for cellphones are designed to steal email addresses and authentication data stored on the devices to access sensitive data from Gmail, Google Photos, Google Docs and other services, Check Point said.
Japan plans to build the world's fastest-known supercomputer as part of a government policy to get back Japan's mojo in the world of technology
The once-mighty Finnish company sold its device business to Microsoft in 2014, where phones were sold under the Lumia brand. But as Microsoft effectively exits the smartphone business, Nokia is set to return.
South Korea denied a request by Google to export digital-map date
Day after releasing new anti-harassment policies, company promotes ad for white supremacists
On trip to US, senior executives in tech industry tell investors of opportunities offered
Facebook today announced that it has purchased CrowdTangle, a 4-year-old tool that publishers use to track how content spreads around the ...
Moscow City Court has upheld a ruling to block the LinkedIn professional network website.
Neither Tesla nor Grohmann have offered details of how much money is to change hands with the Tesla purchase of Grohmann
The presidential election is being debated extensively in the world media. One of the most important topics of discussion is the effect of Google on the US election. Donald Trump has accused Google of manipulating the remaining weeks and hours are now left behind. Trump accused has Google of hiding negative search results about Clinton and showing Clinton ahead in the polls.
Overseas critics of the law have argued that Beijing's new cybersecurity law threatens to shut foreign technology companies out of various sectors deemed "critical", and includes data to be stored on servers located in China
A French teen has been given a suspended jail sentence for naming his wifi network after the terrorist group