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Messages - ChrisReynolds

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Arctic sea ice / Re: Latest PIOMAS update (July)
« on: July 10, 2015, 07:05:58 PM »
Neil T,

I'm having problems following what you are trying to say, so sorry if I get it wrong.

Does it all come down to:

1) Winter 2013 should have reflected the volume loss in 2012.
2) You can't align area and volume.
3) PIOMAS volume goes up when area declines after March.

If I am correct in that presumption your answers are:

1) The growth thickness feedback.

2) You can only align volume and area using thickness, and you'll get nowhere with CT Area. It produces weird 'compactness' as shown in CAPIE, and I found very quickly that while NSIDC Extent and Area work fairly neatly with PIOMAS (though not perfectly), CT Area is quite bonkers - that's why I stopped using it! The best way to use PIOMAS and area is to use their area.h and .heff files for area (concentration of ice) and thickness respectively.

3) Area loss from March onwards comes from thin ice outside the Arctic Ocean, meanwhile the Arctic Ocean is still sub zero and volume of ice within the Arctic Ocean continues to increase after the area maximum. Indeed the volume within the Central Arctic peaks in May!

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Arctic sea ice / ASCAT, PIOMAS and the DAM
« on: February 22, 2013, 10:32:09 PM »
I won't make a habit of starting threads by linking to my blog. But I thought people might find this blog post interesting:
http://dosbat.blogspot.co.uk/2013/02/ascat-piomas-and-dam.html

I balk at the idea of posting all those graphics on a post here.

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