Antarctic ice close to tipping point

Discussion in 'Environment' started by Chris, Mar 22, 2009.

  1. Chris
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    Chris Gold Member

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    SYDNEY (Reuters) - A large part of the ice covering West Antarctica could be lost if greenhouse gases in the atmosphere increase only slightly from today's levels and ocean temperatures continue to rise, a study released on Thursday says.

    Another related study said if the West Antarctic ice sheet collapsed and the East Antarctic ice sheet continued to melt at its marine margins, global sea level would rise seven meters from today's level.

    Antarctica stores about 90 percent of the world's freshwater.

    Both studies, published in the journal Nature, are a result of extensive drilling into the seafloor under the Ross Ice Shelf by a team of New Zealand, Italian, American and Germany scientists.

    The floating ice shelf won't elevate sea levels if melts because it is already displacing water. The real threat comes when the ice sheet behind, which is below sea level, is exposed to the ocean.

    The 50-plus core samples, down to 1.2 kilometers (0.7 mile), allowed the scientists to study how previous periods of rising carbon dioxide affected ocean temperatures, ice movements and sea levels.

    Antarctic ice close to melting tipping point-study | Science | Reuters
     
  2. driveby
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    driveby Gold Member

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    oh neat ......
     
  3. Sinatra
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    Sinatra Senior Member

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    This very paper admits that the ice shelf has melted and reformed several times in years past - and that CO2 levels have in fact been higher than they are now (a number of times no less)

    When it then attempts to claim we need to lower our CO2 emissions...this is absurdity masked as science.

    :lol::lol:
     
  4. dilloduck
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    dilloduck Diamond Member

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    well--it's Chris---what did you expect ? :lol:
     
  5. Sinatra
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    Sinatra Senior Member

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    He is rather slow off the mark it would appear.

    I actually feel a bit sorry for him...
     
  6. Chris
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    Chris Gold Member

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    Nothing slow about me.

    8 billion tons of CO2 added to the atmosphere, year after year, will warm the earth.

    This was proven experimentally in 1859.
     
  7. Sinatra
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    Sinatra Senior Member

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    ______________

    AWESOME! I only hope we can raise that level to about 12 billion tons within the next 20 years!!!!

    Until then, I'm gonna pour a nice globally-warmed glass of Guinness.

    As for you, I suggest you actually do a bit more reading on the subject you are so quick to assume an understanding of...

    More Carbon Dioxide, Please « Watts Up With That?
     
  8. Chris
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    Chris Gold Member

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    Changing the subject again.

    CO2 causes the earth to retain heat.

    Do you deny that?
     
  9. Sinatra
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    Sinatra Senior Member

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    CO2 is a minute portion of the total atmoshpere - and man-made CO2 is an even more minute portion.

    Do you deny that?

    Pull my finger...

    PS - do you drive a car and heat your home?
     
  10. Chris
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    Chris Gold Member

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    So you cannot deny that CO2 causes the earth to retain heat?
     

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