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Thanks Jim!
I use April 1 and September 1 to avoid influence of weather events near sea ice maxima and minima.
Regrowth makes sense. Are there studies that characterize the factors influencing regrowth? If so, they would be valuable for climate models because their current treatment of sea ice is resulting in conservative predictions compared to observations to date.
Commented Sep 17, 2019 on PIOMAS September 2019 at Arctic Sea Ice
PIOMAS September 2019
Apologies for this late update, but at least it will give me the opportunity to give my opinion/analysis of how this melting season has evolved, now that the minimum is just around the corner. It also gives me the opportunity to announce that the Arctic Sea Ice Forum recently passed the 100 mill...
Yes, thank you Neven for the excellent summary! I suspect that GAC-2012 pulled warmer saltier water into the melt equation.
The average data for April 1 and September 1 from JAXA show the climate trend. A simple extrapolation suggests an ice free arctic summer in the 2030/2040 time period.
Years April Sept. delta
1980s 15.2 7.4 7.8
1990s 14.8 6.7 8.1
2000-04 14.6 6.1 8.5
2005-09 13.8 5.3 8.5
2010-14 14.2 5.0 9.2
2015-19 13.6 4.4 9.2
Does anyone have a reasonable idea what may slow this trend?
Commented Sep 17, 2019 on PIOMAS September 2019 at Arctic Sea Ice
PIOMAS September 2019
Apologies for this late update, but at least it will give me the opportunity to give my opinion/analysis of how this melting season has evolved, now that the minimum is just around the corner. It also gives me the opportunity to announce that the Arctic Sea Ice Forum recently passed the 100 mill...
I've been tracking this for awhile and thought folks might be interested. Data are from JAXA Arctic sea ice extent site--thank you again Neven for aggregating data sites! April 1 and September 1 values were used to avoid annual variations near maxima/minima. The decadal data (Sea ice extent x 10^6 km^2) are averages as reported by JAXA. Semidecadal data are medians.
Years April Sept. delta
1980s 15.2 7.4 7.8
1990s 14.8 6.7 8.1
2000-04 14.6 6.1 8.5
2005-09 13.8 5.3 8.5
2010-14 14.2 5.0 9.2
2015-19 13.6 4.4 9.2
The interesting, dare I say alarming, observation is the growth in delta values between 1980s and present.
Commented Sep 2, 2019 on PIOMAS August 2019 at Arctic Sea Ice
PIOMAS August 2019
Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: 2019 had a real opportunity during July to further move away from 2012, but failed to do so. Both yea...
DavidR, can you provide the source of that surface area-to-volume equation?
Thanks!
Jim
Commented Aug 12, 2019 on PIOMAS August 2019 at Arctic Sea Ice
PIOMAS August 2019
Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: 2019 had a real opportunity during July to further move away from 2012, but failed to do so. Both yea...
Great post as always, thanks Neven!
Off topic, but I heard the following piece yesterday and thought folks here would be interested. Sonifying the data drives home the point!
https://ww2.kqed.org/science/2018/01/08/listen-1200-years-of-earths-climate-transformed-into-sound/
Jim
Commented Jan 9, 2018 on PIOMAS January 2018 at Arctic Sea Ice
PIOMAS January 2018
Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: Volume increases for December in the last 10 years aren't all that far apart, ranging from 3500 to 40...
The journal article is behind a paywall, but I saw this news article and thought it would be of interest to folks here.
http://www.sciencemag.org/news/2017/04/warm-atlantic-waters-wage-new-assault-arctic-ice-below
Also, thank you Neven for your posts and the aggregation of data sites under the ASI graphs link!
Commented Apr 11, 2017 on PIOMAS April 2017 at Arctic Sea Ice
PIOMAS April 2017
Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: Just like last month, there haven't been any major changes, and that's good, because it means things ...
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