Tuesday, October 4, 2016

New sea ice starts from 3 important concurring factors: -1.8 C water, little or no sea waves and colder than -11 C surface temperatures

     Artistic sea ice made a giant polar bear!  But today 74.5 N 94.5 W was first sight of grey ice with frazil.  Just in front of the ice bear you can see 2 types of sea ice,   the -11 C type, (darker)  and the less salty water type whiter (bottom of photo) which froze between Multi year ice pans last week.  Overnight South Cornwallis Island temperatures varied between -11 and -12 C,  a wall of multiyear sea ice blocked wave action to the Bay  causing its surface water to be mirror calm,  and the sea water was measured finally at -1.8 C.     The 3 combined always produce frazil then grey ice:

From the Bay shore two different sea ice forming mixed with submerged snow.  After one week,  the mainly from uncharacteristic 12 mm High Arctic rain near beach fresher water tasting sea ice,  has not accreted a great deal, remained rubbery and broke easily:   

One week old  sea ice from mainly rainfall, is extremely fragile brakes on contact.  Can't carry any significant weight,  is rubbery,  very much appearing like sea ice further North near North Pole. 
It formed in much warmer temperatures.

      Later today,  temperatures warmed further and a lot of the grey ice seemed to have melted ,  there is an apparent thermal balance,  where as,  colder than -11 C  surface air seems imperative for sea ice to form.WD October 4, 2016   

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