NSIDC Says The Arctic Is Melting At -25C

On March 15, 2013, Arctic sea ice extent appears to have reached its annual maximum extent, marking the beginning of the sea ice melt season.

Annual maximum extent reached

ScreenHunter_171 Mar. 28 05.52

COI | Centre for Ocean and Ice | Danmarks Meteorologiske Institut

About Tony Heller

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9 Responses to NSIDC Says The Arctic Is Melting At -25C

  1. etudiant says:

    Well, the data plotted here: http://arctic.atmos.uiuc.edu/cryosphere/IMAGES/seaice.recent.arctic.png
    certainly suggests that that assertion is true.
    So the interesting question is what drives the melt process now under way if it is not air temperature. Warm water inflows perhaps?

  2. glenncz says:

    The sun melts the ice.

    • Michael says:

      Wow, Steve, you really attract some smart people.

      The sun cannot melt ice at -25C.

      Now, if there are strong currents of warm water flowing into areas covered by ice, the warm water from underneath the ice can cause melting. But that has nothing to do about surface air temperature, it has to do with the ocean currents. Also, as Steve points out, the wind can compact ice, or it can push ice out of cold water into warmer water where it will melt.

      • miked1947 says:

        Ice conditions in the Arctic cause some people to forget how to think straight! 😉 Maybe their brains are frozen when they think about the ice conditions!

  3. Steve Keohane says:

    Isn’t it interesting how peak ice used to be between Mar 1-11, now it’s about Mar 22, a couple of weeks later. The minimum seems to be staying within a few days of historic average.
    http://arctic-roos.org/observations/satellite-data/sea-ice/observation_images/ssmi1_ice_area.png

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