global warming to ice age for dummies..

Discussion in 'Alpine & Snow' started by adminvb, May 14, 2006.

  1. adminvb

    adminvb First Runs

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    can one of you clever ppl please explain (in kiddy terms ploise, no clever im brainier than thou jargon)how in the living hell can global warming trigger an iceage???
    Im sorry, but after all the hoo ha about melting glaciers and rising oceans, and then the references to the next iceage, the average i-rely-on-the-weatherman-and-if-hes-wrong-i-spend-a-
    ****ty-day-freezing-or-boiling person, is just plain CONFUUUUSED!
    please help me! [​IMG]
     
    #1 adminvb, May 14, 2006
    Last edited: Nov 11, 2013
  2. MisterMxyzptlk

    MisterMxyzptlk Old n' Crusty Ski Pass: Gold

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    have you been watching The Day After Tomorrow again? :no: I specifically told you to turn it off and go to bed!!!A brief precis
    (from www.commondreams.org)
    In quick summary, if enough cold, fresh water coming from the melting polar ice caps and the melting glaciers of Greenland flows into the northern Atlantic, it will shut down the Gulf Stream, which keeps Europe and northeastern North America warm. The worst-case scenario would be a full-blown return of the last ice age - in a period as short as 2 to 3 years from its onset - and the mid-case scenario would be a period like the "little ice age" of a few centuries ago that disrupted worldwide weather patterns leading to extremely harsh winters, droughts, worldwide desertification, crop failures, and wars around the world.
     
    #2 MisterMxyzptlk, May 14, 2006
    Last edited by a moderator: Nov 14, 2013
  3. sir_rhyso

    sir_rhyso One of Us

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    And it's all going to start on the 6th June '06.
     
  4. Sandy

    Sandy Dark Sith Lord of the Pool Room Moderator Ski Pass: Gold

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    The "Little Ice age" had nothing to do with with melting polar ice or the gulf stream.

    Here is a world map showing the major ocean currents.(red is warm, blue is cold, and black is in between, although some of those should probably be red as well) I've marked the thick black lines at the top, but disregard those for the moment. Generally the warmer currents are closer to the surface, while the cooler are deeper down.
    You can see the Gulf Stream which starts off the southern USA/Carribean, and extends all the way up past Norway. This is what keeps Europe warm, given that Europe is so far north.

    [​IMG]

    Arctic sea sea water is around 3-3.5% salt. Arctic sea ice is about 0.1%-1.0% salt, depending on how old it is. When sea ice melts, it decreases the salinity of the water, and if this water enters the northern Atlantic, it will disrupt the northern parts of the Gulf Stream due to salinity, and also the colder temperature of the water. (see the thick black arrows)
    There would also be an influx into the northern Pacific, although the effects would not be as great.

    The world currents are delicately balanced, and such a disruption would affect all the currents.

    .....and this doesn't take into account any glacial run off from Greenland, although this would happen mainly after the Arctic sea ice was melted.
     
    #4 Sandy, May 15, 2006
    Last edited by a moderator: Nov 17, 2013
  5. hair-raiser

    hair-raiser Hard Yards

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    Please stop talking about all this. It's gettin scary!
     
  6. adminvb

    adminvb First Runs

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    ;)
    how did you know LOL!
     
    #6 adminvb, May 15, 2006
    Last edited: Nov 17, 2013
  7. MisterMxyzptlk

    MisterMxyzptlk Old n' Crusty Ski Pass: Gold

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    BRITAIN recorded its hottest July day with a temperature of 36.3C south of London, breaking a record held for nearly a century.

    The national Meteorological Office website said the mercury soared to 36.3C at Charlwood, near London's Gatwick Airport, at 11.32pm (AEST).

    The previous July record was 36C, set on July 22, 1911, at Epsom, southwest of London.
     
  8. BlueMountains

    BlueMountains First Runs

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    Location:
    Upper Blue Mountains of NSW at 1100 metres ASL
    I was just going over the snowfall records for the upper Blue Mountains and our big falls up here are getting less every decade.

    Biggest single falls in last 40 years:

    60s = 40cm

    70s = 23cm

    80s = 15cm

    90s = 10cm

    00s = no falls over 10cm