Thursday, 26 March 2015

Rotten sea ice in the summer?

The 2015 melt season has begun, but as is the nature of a near sinusoid, the peak is rather boring with a small rate of change. So to alleviate the boredom, here's a post about compactness. ;)


Sunday, 22 March 2015

Sea Ice Maximum 2015

Rather late, due to work commitments, here are my comments on the 2015 sea ice maximum. Three days ago NSIDC provisionally called the maximum at 14.54M km^2, on 25 February 2015. Does this mean anything for the coming season?


Sunday, 15 March 2015

Mid March 2015 Status

So far the sea ice extent maximum was set on 22 February 2015, however as of 13 March extent is only 0.14M km^2 below, so it is too early to claim a maximum. That noted there are good grounds to suspect that the 22 February maximum may hold. PIOMAS data is covered at the end of the post.



Tuesday, 10 March 2015

Lindsay & Schweiger 2015: The thinning of Arctic Sea Ice

This is a rather delayed comment on the excellent Lindsay & Schweiger paper that provides lines of fit to sea ice thickness data. One reason for delay is that I have been awaiting the latest PIOMAS update, now that will have to wait until later this week, because I don't want to bury this post.

Monday, 2 March 2015

Evolution in day to day sea ice extent change.

In the comments to my previous post commenter Pete asked about the changes in the seasonal cycle with regards the date of maximum and minimum. In looking at this apparently simple question it actually has all ended up being rather complex, which may say more about me than the question. So sorry Pete, I still haven't really got a post looking at your question, although I do close by touching upon the issue.

However in playing around with the data, trying to settle on a method that will produce a sound answer, I have ended up being diverted by an idea I thought worth pursuing.


Thursday, 19 February 2015

FDDs and Sea Ice Loss

At the end of my last blog post of the Slow Transition series I tagged on a comment and graph about Freezing Degree Days and CO2, I said I would need to think about it. Having been rather distracted by other matters it's taken some time for me to look at it. However I have now done so and in short I don't think CO2 is directly driving winter warming.

Friday, 6 February 2015

January Status: PIOMAS

January's PIOMAS data was released yesterday, it shows that the volume gain over 2012 has decreased massively. But does this really mean the increased volume of 2013/14 is going to go away within one winter?