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What will PIOMAS 2021 Arctic sea ice volume Sept. average be?

Above 5.50 10^3 km^3
0 (0%)
Between 5.00 and 5.50 10^3 km^3
1 (3.7%)
Between 4.75 and 5.25 10^3 km^3
2 (7.4%)
Between 4.50 and 5.00 10^3 km^3
4 (14.8%)
Between 4.25 and 4.75 10^3 km^3
8 (29.6%)
Between 4.00 and 4.50 10^3 km^3
6 (22.2%)
Between 3.75 and 4.25 10^3 km^3
2 (7.4%)
Between 3.50 and 4.00 10^3 km^3
2 (7.4%)
Between 3.25 and 3.75 10^3 km^3
1 (3.7%)
Between 3.00 and 3.50 10^3 km^3
0 (0%)
Under 3.00 10^3 km^3
1 (3.7%)

Total Members Voted: 26

Voting closed: August 11, 2021, 01:09:48 AM

Author Topic: PIOMAS 2021 ASI Volume September Average: August poll  (Read 1369 times)

Juan C. García

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PIOMAS 2021 ASI Volume September Average: August poll
« on: August 01, 2021, 01:09:48 AM »
Values from the PIOMAS Monthly Ice Volume Data:
http://psc.apl.uw.edu/research/projects/arctic-sea-ice-volume-anomaly/data/

Year       Volume
          (10^3 km3)
2000       11.08
2001       12.28
2002       10.85
2003       10.28
2004       10.04
2005         9.28
2006         9.11
2007         6.53
2008         7.25
2009         6.92
2010         4.74
2011         4.48
2012         3.79
2013         5.48
2014         6.97
2015         5.85
2016         4.53
2017         4.68
2018         5.08
2019         4.19
2020         4.16

From lowest to highest:
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

Volume is harder to measure than extent, but 3-dimensional space is real, 2D's hide ~50% thickness gone.
-> IPCC/NSIDC trends [based on extent] underestimate the real speed of ASI lost.

icefisher

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #1 on: August 01, 2021, 02:55:30 AM »
Expecting a 6th place finish at 4.69.

Brigantine

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #2 on: August 01, 2021, 05:28:10 AM »
links to poll threads:
Month - PIOMAS / NSIDC / JAXA
June ___ link ____ link ____ link
July ____ link ____ link ____ link
August - N/A ____ link ____ link

Brigantine

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #3 on: August 01, 2021, 06:08:30 AM »
Because I don't know any better, just copying the transformation I did to JAXA, with a bit more uncertainty:
I take my June prediction as an anchor, slide up 1.5 bins, and squash the spread into 3/5 the width.

4.50 - 5.00

Assumed bin chances: (>5.50) 3%; 4%; 9%; 30%; 34%; 12%; 4%; 2%; 1%; 1%; 0%; 0% (<3.00)
« Last Edit: August 01, 2021, 06:24:54 AM by Brigantine »

Stephan

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #4 on: August 03, 2021, 09:32:22 PM »
Like the other two polls I decided to choose one bin higher (4.25-4.75 k km³).
It is too late just to be concerned about Climate Change

KenB

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #5 on: August 09, 2021, 02:42:17 AM »
I'm sticking with my July bins for all three polls.
"When the melt ponds drain apparent compaction goes up because the satellite sees ice, not water in ponds." - FOoW

Brigantine

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #6 on: August 09, 2021, 11:08:57 PM »
Because I don't know any better, just copying the transformation I did to JAXA, with a bit more uncertainty:
I take my June prediction as an anchor, slide up 1.5 bins, and squash the spread into 3/5 the width.
4.50 - 5.00
Assumed bin chances: (>5.50) 3%; 4%; 9%; 30%; 34%; 12%; 4%; 2%; 1%; 1%; 0%; 0% (<3.00)

Moving back down to 4.25 - 4.75 after all. (1 bin above June prediction)

Assumed bin chances: (>5.50) 2%; 3%; 5%; 18%; 37%; 22%; 7%; 3%; 2%; 1%; 0%; 0% (<3.00)

Juan C. García

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #7 on: August 10, 2021, 05:49:48 AM »
Moving to the range 4.5 - 5.0 km3.

19 hours to vote or change your vote...   ;)
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

Volume is harder to measure than extent, but 3-dimensional space is real, 2D's hide ~50% thickness gone.
-> IPCC/NSIDC trends [based on extent] underestimate the real speed of ASI lost.

gerontocrat

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #8 on: August 10, 2021, 08:03:18 PM »
I am basing my vote on my projection of the September monthly average based on the 10 year average of further volume losses (and gains  in late September)from 31 July to 30 September.

The September Monthly average comes in at 4.39 thousand km3, some 367km3 above the long-term linear trend, and 223 km3 above the Sept 2020 average. (see attached)

So my vote is 4.00 to 4.50 thousand km3.
"Para a Causa do Povo a Luta Continua!"
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Freegrass

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #9 on: August 10, 2021, 08:30:14 PM »
Moving to the range 4.5 - 5.0 km3.

19 hours to vote or change your vote...   ;)
I'm gonna stick with my lonely vote of between 5.00 and 5.50... 4.99 will still be good, no?  ::)

4.75 to 5.25 would probably be a smarter/safer choice, but I don't like to share my bet...  ;D
When factual science is in conflict with our beliefs or traditions, we cuddle up in our own delusional fantasy where everything starts making sense again...

oren

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #10 on: August 11, 2021, 12:14:47 AM »
Upping one bin to 4.00-4.50, the year has been rather slow and it's hard to lose a lot of volume with relatively high area and without major weather (nonstop sunshine or great storms).

Brigantine

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #11 on: September 06, 2021, 02:19:57 PM »
31st of August [...] Volume calculated from thickness on that day was 4.7[1000km3]

how does that Aug 31 figure normally compare with Sept average? Will the Sept average be ever so slightly lower?

Sepp

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Re: PIOMAS 2021 ASI Volume September Average: August poll
« Reply #12 on: September 06, 2021, 11:24:54 PM »
The September average is usually a bit more than 1M below August average, which would result around 4.5. But I do not think previous years give good hints for single outcomes.