Antarctic Ice Shelves Not Melting At All

Discussion in 'Environment' started by Annie, Jun 25, 2012.

  1. Annie
    Offline

    Annie Diamond Member

    Joined:
    Nov 22, 2003
    Messages:
    50,847
    Thanks Received:
    4,644
    Trophy Points:
    1,790
    Ratings:
    +4,770
    Antarctic ice shelves not melting at all, new field data show ? The Register

     
    • Thank You! Thank You! x 1
  2. CrusaderFrank
    Offline

    CrusaderFrank Diamond Member

    Joined:
    May 20, 2009
    Messages:
    81,248
    Thanks Received:
    14,915
    Trophy Points:
    2,210
    Ratings:
    +37,036
    Volcanoes!

    CH4 outgassing!
     
  3. Oddball
    Offline

    Oddball BANNED Supporting Member

    Joined:
    Jan 3, 2009
    Messages:
    41,428
    Thanks Received:
    8,397
    Trophy Points:
    0
    Location:
    Drinking wine, eating cheese, catching rays
    Ratings:
    +8,409
    As the SS Goebbels Warmercoolering takes another hit amidships....

    Antarctic ice shelves not melting at all, new field data show ? The Register
     
  4. Old Rocks
    Offline

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,474
    Thanks Received:
    5,416
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,318
    Along with the drilling, the research also used data from group of elephant seals, outfitted with sensors that measure salinity, temperature, and depth. The scientists benefited from the seals’ lengthy migration, which provided some critical information about Antarctic melting and future sea level rise.

    After crunching the numbers, they concluded that at least parts of eastern Antarctica are melting at significantly lower rates than current models predict.

    Some Antarctic ice shelves not melting as fast thought « Summit County Citizens Voice

    “It has been unclear, until now, how much warm deep water rises below the Fimbul Ice Shelf,” said said Tore Hattermann, a PhD student at the Norwegian Polar Institute and lead author of the study. “Previous ocean models, focusing on the circulation below the Fimbul Ice Shelf, have predicted temperatures and melt rates that are too high, suggesting a significant mass loss in this region that is actually not taking place as fast as previously thought,” Hatterman said.
     
  5. Old Rocks
    Offline

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,474
    Thanks Received:
    5,416
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,318
    Now let's go to the original source.

    So what they are saying is that the sensors on the elephant seals confirmed what their remote sensors had been telling them. And that the warm water pulses are not presently affecting this particular ice shelf.

    Now this is the Eastern Ice Shelf, not the whole of the Antarctic Ice Shelves as your title suggests, so you are in effect creating a lie with your title. But that is what one expects of the sceptics of today.


    Two years of oceanic observations below the Fimbul Ice Shelf, Antarctica

    GEOPHYSICAL RESEARCH LETTERS, doi:10.1029/2012GL051012

    Two years of oceanic observations below the Fimbul Ice Shelf, Antarctica



    Key Points•We present two years of unique observations below the Fimbul Ice Shelf
    •Cold water below the ice suggests low basal melting
    •Solar heated surface water and warm pulses at depth provide heat for melting

    Authors:

    Tore Hattermann


    Ole A. Nøst


    Jonathan M. Lilly


    Lars Henrik Smedsrud



    The mechanisms by which heat is delivered to Antarctic ice shelves are a major source of uncertainty when assessing the response of the Antarctic ice sheet to climate change. Direct observations of the ice shelf-ocean interaction are extremely scarce, and present ice shelf-ocean models struggle to predict reason able melt rates. Our two years of data during 2010-2012 from three oceanic moorings below the Fimbul Ice Shelf in the eastern Weddell Sea show cold cavity waters, with average temperatures of less than 0.1 {degree sign}C above the surface freezing point. This suggests rather low basal melt rates, consistent with remote sensing based, steady state mass balance estimates in this sector of the Antarctic coast. Oceanic heat for basal melting is found to be sup-plied by two sources of warm water that enter below the ice: (i) eddy-like bursts of Modified Warm Deep Water accesses the cavity at depth during eight months of the record; and (ii) a seasonal inflow of warm, fresh surface water flushes parts of the ice base with temperatures above freezing, during late summer and fall. This interplay of processes implies that basal melting cannot simply be parameterized by coastal deep ocean temperatures, but is directly linked to both solar forcing at the surface as well as to coastal processes controlling deep ocean heat fluxes.
     
  6. waltky
    Offline

    waltky Wise ol' monkey Supporting Member

    Joined:
    Feb 6, 2011
    Messages:
    20,873
    Thanks Received:
    1,791
    Trophy Points:
    215
    Location:
    Okolona, KY
    Ratings:
    +3,884
    Granny thinkin' `bout bookin' a vacation to the sunny shores o' Antarctica...
    :D
    Antarctic Peninsula Now Almost As Warm As 12,000 Years Ago
    August 22, 2012 - Rapid warming of the Antarctic Peninsula is bringing temperatures close to the warmth that followed the end of the last ice age, says lead researcher Richard Mulvaney, a paleoclimatologist with the British Antarctic Survey.
     
  7. Katzndogz
    Offline

    Katzndogz Diamond Member

    Joined:
    Sep 27, 2011
    Messages:
    65,659
    Thanks Received:
    7,418
    Trophy Points:
    1,830
    Ratings:
    +8,337
    Of course the ice shelves in Antarctica are not melting. It's winter there.
     
    • Thank You! Thank You! x 1
  8. westwall
    Offline

    westwall USMB Mod Staff Member Gold Supporting Member Supporting Member

    Joined:
    Apr 21, 2010
    Messages:
    40,990
    Thanks Received:
    7,977
    Trophy Points:
    1,830
    Location:
    Nevada
    Ratings:
    +19,734




    I think the SS Goebbels needs to take one in the stern! These amidships hits are fun but I want it dead in the water!
     
  9. westwall
    Offline

    westwall USMB Mod Staff Member Gold Supporting Member Supporting Member

    Joined:
    Apr 21, 2010
    Messages:
    40,990
    Thanks Received:
    7,977
    Trophy Points:
    1,830
    Location:
    Nevada
    Ratings:
    +19,734




    "Models"... gotta love them eh olfraud. Have any of them ever been correct? Noooope!
     
  10. Old Rocks
    Offline

    Old Rocks Diamond Member

    Joined:
    Oct 31, 2008
    Messages:
    46,474
    Thanks Received:
    5,416
    Trophy Points:
    1,840
    Location:
    Portland, Ore.
    Ratings:
    +10,318

Share This Page

Search tags for this page

advot7d6df7ab font name