Cryosphere > Arctic sea ice

Latest PIOMAS update (November 2019)

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Wipneus:
Hello, PIOMAS has updated:
Latest value: 2013-3-1 19.945
Latest value: 2013-3-31 21.612
Latest value: 2013-4-30 21.273
Latest value: 2013-5-31 19.087
Latest value: 2013-6-30 13.002
Latest value: 2013-7-31 7.104
Latest value: 2013-8-31 5.077
Latest value: 2013-9-30 5.343
Latest value: 2013-10-31 8.218
Latest value: 2013-11-30 11.449
Latest value: 2013-12-31 15.225
Latest value: 2014-1-31 18.938  <- version 2.1 !
Latest value: 2014-2-28 20.86
Latest value: 2014-3-31 22.609
Latest value: 2014-4-30 22.94
Latest value: 2014-5-31 20.288
Latest value: 2014-6-30 14.632
Latest value: 2014-7-31 9.575
Latest value: 2014-8-31 7.22
Latest value: 2014-9-30 7.119 (minimum 2014  on 9-18: 6.810)
Latest value: 2014-10-31 9.701
Latest value: 2014-11-30 13.314
Latest value: 2014-12-31 16.842
Latest value: 2015-1-31 20.229
Latest value: 2015-3-8 22.813
Latest value: 2015-3-31 24.036
Latest value: 2015-4-30 24.066
Latest value: 2015-5-31 21.496
Latest value: 2015-6-30 15.263
Latest value: 2015-7-31 8.604
Latest value: 2015-8-31 5.975
Latest value: 2015-9-15 5.713
Latest value: 2015-9-30 6.032
Latest value: 2015-10-31 8.563
Latest value: 2015-11-30 11.999
Latest value: 2015-12-31 15.652
Latest value: 2016-1-31 18.536
Latest value: 2016-2-29 20.660
Latest value: 2016-4-1 22.337
Latest value: 2016-5-1 22.268
Latest value: 2016-6-1 19.201
Latest value: 2016-7-1 13.177
Latest value: 2016-8-1 7.448
Latest value: 2016-9-1 4.638
Latest value: 2016-10-1 4.869
Latest value: 2016-11-1 6.534
Latest value: 2016-12-1  9.515
Latest value: 2016-12-31 13.078
Latest value: 2017-1-31 16.162
Latest value: 2017-2-28 18.608
Latest value: 2017-3-31 20.398
Latest value: 2017-4-30 20.64
Latest value: 2017-5-31 18.11
Latest value: 2017-6-30 12.164
Latest value: 2017-7-31 6.725
Latest value: 2017-9-15 4.658
Latest value: 2017-11-30 10.871
Latest value: 2017-12-31 14.418
Latest value: 2018-01-31 17.57 (prelim)

I have updated my graphics at Arctische Pinguin https://sites.google.com/site/arctischepinguin/home/piomas/ for the latest data.

Monthly data:

Daily Anomalies:

Daily data with a "prediction" based on exponential trend:

Wipneus:
From the official graphs:

Thickness:

Wipneus:
So according to PIOMAS , the ice volume and thickness (and therefore area) are at the beginning of March almost the same as in 2012. And still a month to grow even thicker.

Dave C:
Well it looks like the ice cracks had a big effect, but in the opposite direction many people were predicting.  The previous record for volume gain through March 1st was 16.4. We are at 16.7 now. It is fairly likely we will break or tie the record for volume gain this year. 

We will see if the cracks result in a record volume loss as well but I am skeptical. The cracks are far from the fram strait and will have time to refreeze. Volume doesn't peak until sometime in April.

I am going to predict a recovery year, with an expected value for volume minimum close to last years number. 

crandles:

--- Quote from: Wipneus on March 12, 2013, 05:28:20 PM ---So according to PIOMAS , the ice volume and thickness (and therefore area) are at the beginning of March almost the same as in 2012. And still a month to grow even thicker.

--- End quote ---

2011 day 60 19.981
2012 day 60 19.812
2013 day 60 19.945

So volume also almost same as 2011 as well as 2012.

One reason for growing thicker faster is heat can be lost faster through thinner ice. If the ice has caught up in thickness that reason disappears.

So is any further thickening relative to 2012 likely to be a result of less snow cover? If so, the lower snow cover might mean lower albedo and a faster start to the melt season? The frozen over cracks certainly look like they have lower albedo.


Got a feeling there was a diagram showing evolution of ice thickness and snow thickness after instantaneous removal of sea ice in Schroder and Connolley 2007 but I am struggling to find it now.

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