+- +-

+-User

Welcome, Guest.
Please login or register.
 
 
 
Forgot your password?

+-Stats ezBlock

Members
Total Members: 42
Latest: eranda
New This Month: 0
New This Week: 0
New Today: 0
Stats
Total Posts: 9830
Total Topics: 240
Most Online Today: 2
Most Online Ever: 52
(November 29, 2017, 04:04:44 am)
Users Online
Members: 0
Guests: 0
Total: 0

Author Topic: Global Warming is WITH US  (Read 24392 times)

0 Members and 0 Guests are viewing this topic.

AGelbert

  • Administrator
  • Hero Member
  • *****
  • Posts: 9635
  • Location: Colchester, Vermont
    • View Profile
    • Agelbert Truth AND Consequences
Two Subglacial Lakes Discovered in Greenland
« Reply #15 on: November 29, 2013, 11:22:12 pm »
Two Subglacial Lakes Discovered in Greenland
Nov 28, 2013 by Sci-News.com 

A team of researchers from the University of Cambridge’s Scott Polar Research Institute has discovered two lakes about 800 m below the ice sheet near the town of Qaanaaq in northwestern Greenland.


This map shows the location of two subglacial lakes near the town of Qaanaaq in northwestern Greenland.

Subglacial lakes are likely to influence the flow of the ice sheet, impacting global sea level change. The discovery of the lakes in Greenland will help researchers to understand how the ice will respond to changing environmental conditions.

The Cambridge scientists used airborne radar measurements to reveal the lakes underneath the ice sheet.

The two lakes are roughly 8-10 km2, and at one point may have been up to 3 times larger than their current size.

They are found in the northwest sector of the Greenland Ice Sheet, about 40 km from the ice margin, and below 757 and 809 m of ice, respectively.

“Our results show that subglacial lakes exist in Greenland, and that they form an important part of the ice sheet’s plumbing system. Because the way in which water moves beneath ice sheets strongly affects ice flow speeds, improved understanding of these lakes will allow us to predict more accurately how the ice sheet will respond to anticipated future warming,” said Dr Steven Palmer, the lead author of the study published online in the journal Geophysical Research Letters.

The lakes are unusual compared with those detected beneath Antarctic ice sheets, suggesting that they formed in a different manner.


This radar map shows subglacial bed elevations near the town of Qaanaaq; lines show contours of the newly discovered subglacial lakes; dashed lines show possible previous larger contours. Image credit: Palmer SJ et al.

The scientists propose that, unlike in Antarctica where surface temperatures remain below freezing all year round, the newly discovered lakes are most likely fed by melting surface water draining through cracks in the ice. A surface lake situated nearby may also replenish the subglacial lakes during warm summers. This means that the lakes are part of an open system and are connected to the surface, which is different from Antarctic lakes that are most often isolated ecosystems.

While nearly 400 lakes have been detected beneath the Antarctic ice sheets, the two newly discovered lakes are the first to be identified in Greenland.
______
Bibliographic information: Palmer SJ et al. 2013. Greenland subglacial lakes detected by radar. Geophysical Research Letters, published online; doi: 10.1002/2013GL058383

http://www.phenomenica.com/pin/e97ee2054defb209c35fe4dc94599061
Leges         Sine    Moribus     Vanae   
Faith,
if it has not works, is dead, being alone.

 

Related Topics

  Subject / Started by Replies Last post
10 Replies
736 Views
Last post March 07, 2016, 08:06:00 am
by trianglejohn
1 Replies
355 Views
Last post July 21, 2014, 10:29:36 pm
by AGelbert

+-Recent Topics

Pollution by AGelbert
June 22, 2018, 10:47:55 pm

Electric Vehicles by AGelbert
June 22, 2018, 10:32:21 pm

Fossil Fuel Skulldugggery by AGelbert
June 22, 2018, 10:21:32 pm

Wind Power by AGelbert
June 22, 2018, 10:00:38 pm

Global Warming is WITH US by AGelbert
June 22, 2018, 08:21:48 pm

Photvoltaics (PV) by AGelbert
June 22, 2018, 07:00:46 pm

Corruption in Government by AGelbert
June 22, 2018, 06:48:50 pm

Key Historical Events ...THAT YOU MAY HAVE NEVER HEARD OF by AGelbert
June 21, 2018, 10:40:48 pm

Sustainable Farming by AGelbert
June 20, 2018, 09:59:21 pm

Human Life is Fragile but EVERY Life is Valuable by AGelbert
June 20, 2018, 09:18:37 pm

Free Web Hit Counter By CSS HTML Tutorial