Near Real Time Sea Ice Volume

[Random_Weather]

And here why i use r-script, today written:

[Random_Weather]

Update on Volume

[Random_Weather]

Update + change from Exel to "R" + change from NSIDC to AMSR2



now include the most recent volume of the "lines"

[Tom_Mazanec]

We are distinctly below the average for the decade.
Are we record low?

[Random_Weather]

Since i account for instrumental uncertainy, its not for sure, but when you look at the "Min", its lower in 2019/2020 then as every year 2011_2018 (dotted black)

[Jim Hunt]

Hi,

I build up an Near Real Time Sea Ice Volume (NRT SIV) product based on merged data from SMOS and Cyrosat2.

Hi Christian,

Sorry, but I hadn't spotted this thread before. At least my alter ego has now bumped into you on Twitter!

Please see:

http://GreatWhiteCon.info/2020/01/wheres-the-thickest-arctic-sea-ice-gone/#comment-311075

and

https://twitter.com/GreatWhiteCon/status/1222448934750162944

[Random_Weather]

Hi Jim,

Yes i also done a new script which allows to estimate volume direct to sea ice concentration, thickness and the area of the grids, results looks like this



the only thing i think about is to add is again the nrt data, but analysis is just 2 weeks behind so for that, i think it must not

[Glen Koehler]

Interesting to have a near real time volume estimate.  Thanks for doing that.

What is the uncertainty range indicated on graph 95% CI (2.5% to 97.5% of estimate distribution)?

Is the current value calculated with same sources and methods as the 2011-2018 average?

How the Volume estimate using this method compare to PIOMAS volume for same dates?

[Random_Weather]

Interesting to have a near real time volume estimate.  Thanks for doing that.

What is the uncertainty range indicated on graph 95% CI (2.5% to 97.5% of estimate distribution)?

Is the current value calculated with same sources and methods as the 2011-2018 average?

How the Volume estimate using this method compare to PIOMAS volume for same dates?

Its min/max value + unc of the instruments, in a more formal way:

max_min+-Unc = Max_Min(Volume) for the Date +- the Volume of the instrumental Uncertainy (which is often 0.1m in Thickness)

to the rest:

Its calculated all the same way, as you note at the first side of the thread here, there is a figure of compare PIOMAS, Cyrosat2 and this product

greets

[shendric]

Hi all users of the CryoSat-2/SMOS sea-ice thickness dataset,

please be aware that the latest thickness maps have to be taken with a grain of salt, as the near-realtime input data from CryoSat-2 is currently not complete:

https://spaces.awi.de/display/SIRAL/2020/02/11/CryoSat-2+-+missing+NRT+data+in+baseline-D

We will update the CS2SMOS data set with the complete reprocessed CryoSat-2 data at a later stage. I however don't think that the sea ice volume estimates will change much. The merging algorithm is quite forgiving for data gaps. 

Stefan

[Jim Hunt]

Hi all users of the CryoSat-2/SMOS sea-ice thickness dataset,

Thanks Stefan,

See also the "developers" version:

https://forum.arctic-sea-ice.net/index.php/topic,3000.0.html

Constructive criticism welcome!