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Arctic Sea Ice 2020?

Arctic Sea Ice 2020?

Unread postby jawagord » Thu 26 Mar 2020, 09:06:21

The doom and gloom ice posting are off to a slow start this year. March maximums are in and it’s another non record year with Arctic sea ice extent the highest in 7 years. Natural variability trumps AGW again?

Arctic sea ice appears to have reached its annual maximum extent on March 5. The 2020 maximum sea ice extent is the eleventh lowest in the 42-year satellite record, but the highest since 2013.

http://nsidc.org/arcticseaicenews/
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Re: Arctic Sea Ice 2020?

Unread postby JuanP » Thu 26 Mar 2020, 09:24:04

jawagord wrote:The doom and gloom ice posting are off to a slow start this year. March maximums are in and it’s another non record year with Arctic sea ice extent the highest in 7 years. Natural variability trumps AGW again?

Arctic sea ice appears to have reached its annual maximum extent on March 5. The 2020 maximum sea ice extent is the eleventh lowest in the 42-year satellite record, but the highest since 2013.

http://nsidc.org/arcticseaicenews/

The maximum ice extension may not be that bad, but how about thickness and total volume? Most of that ice is very thin ice that could melt very fast if recent record hot global temperatures continue. Maximum winter ice extent is one of the least important numbers regarding this issue. It's the Summer ice that is most important. I guess we will see what the minimum Arctic sea ice extension looks like in a few months. I expect Arctic sea ice to melt almost completely any year now, and the albedo from that will seriously melt the little multi year thick ice remaining.
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Re: Arctic Sea Ice 2020?

Unread postby Azothius » Sat 28 Mar 2020, 08:12:22

Looking at the 2020 extent on the NSIDC chart, there has been unusually quick reduction in extent. Am wondering if this is bad data? See the graph here:
https://nsidc.org/arcticseaicenews/char ... ice-graph/


Looking at the volume, it does look like 2020 will likely come in as the lowest ever as the melt season develops (the volume continues to grow to mid April even as the edges begin to melt?):

Image


I have also been wondering about the relatively thin ice in the central arctic basin, here is 2020 map:

Image


here is March 27, 2019 for comparison:

Image


and here is March 27, 2018:

Image


http://polarportal.dk/en/sea-ice-and-ic ... nd-volume/
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