sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : Scientists get more in depth view of Antarctica’s landmass
Scientists get more in depth view of Antarctica’s landmass


'Bedmap2, A different view - Antarctica without the ice'    British Antarctic Survey ©

Scientists at the British Antarctic Survey (BAS) have been working with a host of international collaborators to offer the most detailed map yet of Antarctica’s landmass. Bedmap2 uncovers a landscape of mountain ranges and plains cut by gorges and valleys much deeper than previously seen.

In addition, the map allows scientists to analyse, in much greater detail, the bed below the Antarctic ice sheet.

Several features of the bed have been revealed for the first time including a new deepest point. The bed under the Byrd Glacier in Victoria Land is 2,870 metres below sea level making it the lowest point on any of the Earth’s continental plates.

The map was compiled using datasets collected from radio echo sounding measurements, seismic techniques, satellite readings and cartographic data.

A number of key statistics emerge:

• The volume of ice in Antarctica is 4.6% greater than previously thought
• The mean bed depth of Antarctica, at 95 metres, is 60 m lower than estimated
• The volume of ice that is grounded with a bed below sea level is 23% greater than originally thought meaning there is a larger volume of ice that is susceptible to rapid melting. The ice that rests just below sea level is vulnerable to warming from ocean currents
• The total potential contribution to global sea level rise from Antarctica is 58 metres, similar to previous estimates but a much more accurate measurement
• The new deepest point, under Byrd Glacier, is around 400 metres deeper than the previously identified deepest point

Peter Fretwell, from the British Antarctic Survey, says: 'The new Bedmap shows, with unprecedented detail, the bedrock beneath the ice sheets of Antarctica. Before we had a regional overview of the topography, but this new map, with its much higher resolution, shows the landscape itself; a complex landscape of mountains, hills and rolling plains, dissected by valleys troughs and deep gorges.'

Dr Hamish Pritchard, co-lead author of the study, says: 'The Bedmap2 project is about more than making a map of the landscape. The data we've put together on the height and thickness of the ice and the shape of the landscape below are fundamental to modelling the behaviour of the ice sheet in the future. This matters because in some places, ice along the edges of Antarctica is being lost rapidly to the sea, driving up sea level. Knowing how much the sea will rise is of global importance, and these maps are a step towards that goal.'

View the research paper

British Antarctic Survey website


by British Antarctic Survey

  

Click on the FB Like link to post this story to your FB wall

http://www.sail-world.com/index.cfm?nid=107456

7:52 PM Wed 13 Mar 2013GMT


Click here for printer friendly version
Click here to send us feedback or comments about this story.







News - USA and the World















Volvo Ocean Race: Team Vestas Wind gears up in Alicante by Richard Gladwell/Sail-World.com/nz,


























Soling North American Championship concludes on Lake Erie by Canadian International Soling Association,


























ISAF Sailing Worlds - Four champions crowned as racing wraps up
ISAF Sailing Worlds, Santander - USA finishes Top-10 in 4 classes
Outteridge and Jensen – What doesn’t kill you makes you stronger
ISAF Sailing Worlds, Santander - Giles Scott wins Gold
Santander Worlds - 49ers Burling and Tuke clear ahead
ISAF Sailing Worlds – Live broadcast - Medal races
Starboard Hatteras Wave Jam day 5
WMRT Chicago Match Cup 2014 – GAC Pindar through to the semi-finals
Bart’s Bash 2014 at Royal Hong Kong Yacht Club in Victoria Harbour
Bart's Bash: First event in at Wakatere in New Zealand
ISAF Sailing Worlds Santander 2014 - AUS Laser and 470 Medals + video
2014 Patriot Regatta - U.S. Coast Guard team wins
2014 ISAF Sailing World Championships - Santander - Day 9 highlights
2014 Etchells North American Championship – Day 2
Chicago Match Cup - Top four tour teams tackle tomorrow in semi-finals
470 Men and Women Worlds - Champions decided in Santander
ISAF Sailing Worlds, Santander: 49er and Nacra 17 world titles claimed
ISAF Sailing Worlds - Caleb Paine through to Finn medal race + video
ISAF Worlds - 49er, 49erFX, Finn and Nacra 17 Rio 2016 spots taken
ISAF Sailing Worlds - 470 Women's medal race images by Thom Touw
ISAF Sailing Worlds, Santander: Scott all set to lift Finn world title   
ISAF Sailing Worlds - 470 Men's medal race images by Thom Touw   
ISAF Sailing Worlds, Santander - Aussies and Austrians claim 470 gold   
ISAF Sailing Worlds, Santander: 470 awards images by Sail-World.com   
ISAF Sailing Worlds, Santander - 470 medal race images by Jesus Renedo   
Annapolis-to-Newport Race - 'What to Expect' Seminar to take place   
Royal Cup Marina Ibiza - No racing on penultimate day   
Belcher takes record fifth 470 World Championship   
ISAF Sailing World Championships - Santander - Day 8 video highlights   
2014 Great Lakes Team Racing Championship about to set off   
2014 Etchells North American Championship - Day 1   
2014 U.S. Multihull Championship - Day 1   
2014 Chicago Match Cup - Repechage top four determined in final flight   
J/24 World Championship - 35th anniversary preview   
470 Men and Women Worlds - Santander medal race line-up confirmed   
ISAF Sailing Worlds, Santander - Day 8 images by Sail-World.com   
Royal Cup Marina Ibiza - Quantum Racing stumbles in coastal race   
ISAF Sailing Worlds, Santander - Americans ready for 470 medal races   
ISAF Sailing Worlds, Santander: Action ramps up with end zone in sight   
Big Boat Series - It's not the size, it's the length   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png http://www.sail-world.com/event_images/image/FaceBook-icon.png  http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL NEW US
LocalAds   DE  ES  FR  IT