Thursday, August 18, 2016

2nd day GAC, North Pole situation looks more open than ever

~Sea ice rotation "to the right" of winds,  does not show up so well,  scattering seems more isobaric
~ Melt rates vary in steps associated with Low pressure movement.

CMC GAC yesterday august 16 at 18 UTC

CMC August 17 18 UTC surface analysis.  981 mb situated 82N 150E not moving Southwards anymore from this time ,  at 00 UTC the centre was 82N 155E, 983 mb.  This means that a new batch of sea ice was broken up further and or at different locations since yesterday.  Note the isobars,  and look at the rotation of the entire sea ice pack carefully:
JAXA   Map Clearly shows very little outward dispersions,  but very much sea ice movement following  Isobaric lines more closely.  The centre of the Cyclone stayed long enough at 86N to cause extensive water zone not readily filling up with scattered ice. You can even notice the isobaric lines etched in sea ice just South of the Pole towards Alaska and Bering Strait.   The new Low pressure centre has dragged a new batch of sea ice along the  Ostrov Komsomolets Eastern ice bridge shore to cover open water, this accounts for a reduction in  extent daily drop to 73,373 km2 (3rd greatest melt for aug 17 since 2002).  Note the great scattering of sea ice along Wrangel Island 'pan handle' Eastern shores,  surely will give great extent drops in the coming days.  The rotation of the entire pack also affects the Atlantic sea ice front,  bringing sea ice a top exposed open water.    Finally if the Trans Polar Stream has a chance to resume,  there will be a lot of open water at the North Pole come this minima. WD August 18,2016

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