Walt Meier : Ice-Free Arctic In The Last 15,000 Years

“Examination of several proxy records (e.g., sediment cores) of sea ice indicate ice-free or near ice-free summer conditions for at least some time during the period of 15,000 to 5,000 years ago”

http://wattsupwiththat.com/

The Polar Bears must gave gone extinct (or mated with Grizzlies.)

About Tony Heller

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6 Responses to Walt Meier : Ice-Free Arctic In The Last 15,000 Years

  1. M White says:

    http://www.bbc.co.uk/news/science-environment-13002706

    “Scientists who predicted a few years ago that Arctic summers could be ice-free by 2013 now say summer sea ice will probably be gone in this decade.”

  2. Hi Steven, heres PIPS ice data for apr 1´sts 1999-2011.
    Pixels has been counted using mypixelpal software.
    http://hidethedecline.eu/media/DK/PIPSapr12011.jpg

    The jump in recent years for especially the thick ice above 2 or 2,5 meters is stunning.
    The illustration i used is fig 10 from:
    http://journals.ametsoc.org/doi/pdf/10.1175/1520-0450%282001%29040%3C0741%3AADYOTO%3E2.0.CO%3B2

    Note: The unit “1000 km2” is not precise. lower latitudes are slightly underrepresented. However, the ice within the Arctic ocean itself has only small error due to this. There fore especially trends of thicker ice are useful.

    K.R. Frank

    PS:

    Greenland Summit 2011 mar 19 hekd against limits of Summit temperatures 1987-99:
    http://www.klimadebat.dk/forum/vedhaeftninger/summitmar2011.jpg

    However, Wunderground did not have -66, only – 61 for Summit. Still this is 212 K, and this appears slightly lower than min 1987-99

  3. wops, the lines switched sequence 🙂

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