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Messages - abraca

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Arctic sea ice / Re: Home brew AMSR2 extent & area calculation
« on: August 29, 2017, 10:39:53 AM »
Educated guess: count blue and red pixels in CAA. I can see A LOT of red all over CAA. Similar with area, but here color means change of more than 7% - so it may be that bluish area is bigger by pixel count, but area increased there 8%, while other reddish areas decreased 50+% and overwhelmed increases.

Arctic sea ice / Re: What the Buoys are telling
« on: August 13, 2017, 01:35:10 AM »
Pavel's animation of Obuoy 14 photos,1834.msg125028.html#msg125028 seems to show the buoy has been liberated - the ice in view appears to be drifting away from the camera.
The horizon moves up also, and adequately, so this seems like it is a pitch change only - the ice around the buoy seems gone to let it have some space to move, but it doesn't seem like it's free, like on open water.

Arctic sea ice / Re: The 2016/2017 freezing season
« on: February 10, 2017, 09:17:54 PM »
I've found on that once we have lows over pole, the fresh ice is taken from Siberia coastline and compacted into main, thicker pack, while making coastline ice-free or with very thin ice layer, which thickens quickly even on low FDD, it contribute some into volume - the ice seems to be recovering to ~0.5m very fast in these areas. And as main pack gains are not much smaller after such new ice incorporation, it shouldn't amortize the amount of ice gained on these coastlines. This can further make the influence of low FDD on thickness/volume even farther from being linear.
Are you able to estimate how big the effect is and if insignificant or not?

Arctic sea ice / Re: What the Buoys are telling
« on: August 17, 2016, 05:14:35 PM »
Some near the camera in circle 1  - and even more in the circle number 2. To my eyes this looks like the same floe but with quite different edges 4 hours later.

Hello, this is my first post here. I'd like to present you a 27h difference between buoy 14 images. The floe which the camera is on is really stationary in the images (you can compare these two little highs on the upper left of the floe), so any changes I'd consider a result of melting. The image contains only parts that "disappeared" in 27h:

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