Support the Arctic Sea Ice Forum and Blog

Author Topic: Latest PIOMAS update (September 2019)  (Read 1029494 times)

psymmo7

  • New ice
  • Posts: 33
    • View Profile
  • Liked: 8
  • Likes Given: 4
Re: Latest PIOMAS update (January)
« Reply #2700 on: February 05, 2019, 12:51:39 PM »
Sadly downloaded .mp4 doesn't work on my widows 10 computer and "gspot" program https://www.videohelp.com/software/GSpot can't identify codec needed.
What players are those others using that get it to work?

uniquorn

  • Nilas ice
  • Posts: 1361
    • View Profile
  • Liked: 660
  • Likes Given: 124
Re: Latest PIOMAS update (January)
« Reply #2701 on: February 05, 2019, 12:58:59 PM »
Thanks Wipneus  :)
Works very well using VLC

binntho

  • Grease ice
  • Posts: 982
    • View Profile
  • Liked: 243
  • Likes Given: 71
Re: Latest PIOMAS update (January)
« Reply #2702 on: February 05, 2019, 01:08:28 PM »
It worked for me flawlessly in the browser (Google Chrome) on a Windows 10 machine.
because a thing is eloquently expressed it should not be taken to be as necessarily true
St. Augustine, Confessions V, 6

Neven

  • Administrator
  • First-year ice
  • *****
  • Posts: 7074
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 662
  • Likes Given: 433
Re: Latest PIOMAS update (January)
« Reply #2703 on: February 05, 2019, 01:13:57 PM »
I've taken the liberty of uploading it to YouTube (let me know if that's not okay with you, Wip):

Il faut comparer, comparer, comparer, et cultiver notre jardin

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (January)
« Reply #2704 on: February 05, 2019, 04:25:12 PM »
Lots of people can see the animation within the forum, some have to download first and some have failed altogether.

On my Linux computer Chrome works fine but Firefox does not recognise the movie. I have uploaded a smaller animation that works fine here with both browsers.

Can people that had difficulties give it a try and report?

The post is here:
https://forum.arctic-sea-ice.net/index.php/topic,2558.msg188194.html#msg188194

psymmo7

  • New ice
  • Posts: 33
    • View Profile
  • Liked: 8
  • Likes Given: 4
Re: Latest PIOMAS update (January)
« Reply #2705 on: February 05, 2019, 05:25:16 PM »
Hi Wipneus,
your short .mp4 test animation worked fine with both Firefox, Chrome and Microsoft edge under Windows 10.
I also tested the original post in Chrome. It worked fine, but it didn't play in either Firefox or Edge.
The problem clearly lies with Firefox / Edge.

After downloading the short test animation also played in most video players whereas the
original big .mp4 file didn't play in the same players  because its codec wan't recognized.

I hope this information is useful


Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (January)
« Reply #2706 on: February 05, 2019, 06:44:45 PM »
Thanks to all that have tried and responded.

The positive feedbacks gives me confidence that I have nailed a big source of the incompatibility. In short: do not create mp4 files with an odd number of rows.

Cropping the image height from 695 to 694 gives the attached "big" animation:

magnamentis

  • Guest
Re: Latest PIOMAS update (January)
« Reply #2707 on: February 05, 2019, 09:32:57 PM »
Thanks to all that have tried and responded.

The positive feedbacks gives me confidence that I have nailed a big source of the incompatibility. In short: do not create mp4 files with an odd number of rows.

Cropping the image height from 695 to 694 gives the attached "big" animation:

works great on windows 7 chrome, windows 10 chrome, osx safari, osx mojave chrome and android 7.0 - 9.0 chrome browser, that's quite a lot of compatibilitiy IMO

Stephan

  • Grease ice
  • Posts: 652
    • View Profile
  • Liked: 163
  • Likes Given: 98
Re: Latest PIOMAS update (January)
« Reply #2708 on: February 05, 2019, 09:51:40 PM »
Wipneus - brilliant.
The original video worked finely without any problems on my laptop basing on a Windows 8 system. I am on www. using Google Chrome.

oren

  • Young ice
  • Posts: 4314
    • View Profile
  • Liked: 774
  • Likes Given: 1237
Re: Latest PIOMAS update (January)
« Reply #2709 on: February 06, 2019, 02:17:00 AM »
Thanks Wipneus. That is the most amazing animation I've seen for quite a while.

longwalks1

  • New ice
  • Posts: 87
    • View Profile
  • Liked: 11
  • Likes Given: 5
Re: Latest PIOMAS update (January)
« Reply #2710 on: February 06, 2019, 04:27:34 PM »
Player  for .mp4
  "mpv"  It is supposed to work on Windows ( at least 7 and 10) 
https://mpv.io/installation/

For linux any distro should support.  It does not drag in "everything but the kitchen sink" like VLC. (which would make it smaller than VLC in Windows also.)  It has just worked for me for years. 

The video was definitely a keeper.  Mange tusen takk. (Many thousand thanks)

psymmo7

  • New ice
  • Posts: 33
    • View Profile
  • Liked: 8
  • Likes Given: 4
Re: Latest PIOMAS update (January)
« Reply #2711 on: February 06, 2019, 07:39:33 PM »
Thanks to all that have tried and responded.

The positive feedbacks gives me confidence that I have nailed a big source of the incompatibility. In short: do not create mp4 files with an odd number of rows.

Cropping the image height from 695 to 694 gives the attached "big" animation:

Thanks Wipneus - works great even in Firefox and its a great video - brings home the message.
 
and thanks  longwalks1 for the "mpv" videoplayer tip.  The downloaded mp4s (either original or the latest one) all play fine with it.


RealityCheck

  • Frazil ice
  • Posts: 117
    • View Profile
  • Liked: 17
  • Likes Given: 4
Re: Latest PIOMAS update (January)
« Reply #2712 on: February 06, 2019, 08:03:27 PM »
Wow.
'Sic transit gloria mundi' - in one 2-minute video.
A truly stunning story. Many thanks Wipneus.
I intend to use this for educational purposes. How would you like to be credited, please?
Sic transit gloria mundi

Eric

  • New ice
  • Posts: 1
    • View Profile
  • Liked: 1
  • Likes Given: 0
Re: Latest PIOMAS update (January)
« Reply #2713 on: February 10, 2019, 06:14:11 PM »
Here are the volume and volume-anomaly graphs updated to 2018.

Hello Wipneus,
I’ve been using your PIOMAS daily arctic ice volume webpage as a dashboard and communication tool whenever the issue comes up in a conversation for the last 6 years. Thanks so much for that !
I’m not sure if it’s due to the government shutdown or just missing space for 2019, but your latest charts are missing this year’s data.
I noticed the polar science center seems to have the latest data, but since your charts are much easier to read, I thought I’d point that out.
Anyway, keep up the good work
http://psc.apl.uw.edu/wordpress/wp-content/uploads/schweiger/ice_volume/BPIOMASIceVolumeAnomalyCurrentV2.1_CY.png

Neven

  • Administrator
  • First-year ice
  • *****
  • Posts: 7074
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 662
  • Likes Given: 433
Re: Latest PIOMAS update (January)
« Reply #2714 on: February 10, 2019, 06:48:43 PM »
Looks like the graphs have been updated, but the data not yet.

Edit: Data updated too now.
« Last Edit: February 10, 2019, 08:29:32 PM by Neven »
Il faut comparer, comparer, comparer, et cultiver notre jardin

crandles

  • Nilas ice
  • Posts: 2467
    • View Profile
  • Liked: 77
  • Likes Given: 46
Re: Latest PIOMAS update (January)
« Reply #2715 on: February 10, 2019, 06:54:25 PM »
Have we noticed PIOMAS being 7th lowest before?

Neven

  • Administrator
  • First-year ice
  • *****
  • Posts: 7074
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 662
  • Likes Given: 433
Re: Latest PIOMAS update (January)
« Reply #2716 on: February 10, 2019, 10:58:41 PM »
PIOMAS February 2019 is up on the ASIB.
Il faut comparer, comparer, comparer, et cultiver notre jardin

TerryM

  • First-year ice
  • Posts: 5009
    • View Profile
  • Liked: 309
  • Likes Given: 5
Re: Latest PIOMAS update (January)
« Reply #2717 on: February 11, 2019, 01:36:34 AM »
Wipneus


Simply Wonderful!


Terry

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (February)
« Reply #2718 on: February 11, 2019, 02:56:03 PM »
PIOMAS has released the official volume data up to the end of January. Unfortunately not the daily gridded data that I use for the animation and some other graphs.

Attached are the volume and volume-anomaly graphs. I tried to do something quick about the "reds problem", still not ideal but looks to me a little better.  If someone knows a source with optimum distinguishing colors for a line-style graphic with 20 or so lines...


gerontocrat

  • First-year ice
  • Posts: 6080
    • View Profile
  • Liked: 1166
  • Likes Given: 19
Re: Latest PIOMAS update (February)
« Reply #2719 on: February 11, 2019, 05:40:03 PM »
Here is the volume data presented in the same format as I use for the JAXA ice extent tables and graphs. Daily volume increases mostly above average in January, hence 6th lowest became 7th lowest.
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

  • First-year ice
  • Posts: 6080
    • View Profile
  • Liked: 1166
  • Likes Given: 19
Re: Latest PIOMAS update (February)
« Reply #2720 on: February 11, 2019, 06:58:48 PM »
And a couple of more graphs - data from Wipneus and Polar Science Center.
Monthly Averages and 365 day averages since 1979
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

b_lumenkraft

  • Guest
Re: Latest PIOMAS update (February)
« Reply #2721 on: February 11, 2019, 07:41:56 PM »
Following that polynomial, when is it at zero gerontocrat?

gerontocrat

  • First-year ice
  • Posts: 6080
    • View Profile
  • Liked: 1166
  • Likes Given: 19
Re: Latest PIOMAS update (February)
« Reply #2722 on: February 11, 2019, 09:10:51 PM »
Following that polynomial, when is it at zero gerontocrat?
I have not looked - projecting any time into the future, especially that far, using these chart tools is where madness lies. I just added the x2 polynomial to see if it suggested currently volume loss is on an accelerating trend.

What matters is what will change in the Arctic, how that will affect Arctic sea ice, and how that will in turn change the changes in the Arctic and so on........
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

slow wing

  • Grease ice
  • Posts: 780
    • View Profile
  • Liked: 141
  • Likes Given: 379
Re: Latest PIOMAS update (February)
« Reply #2723 on: February 12, 2019, 06:28:22 AM »
If someone knows a source with optimum distinguishing colors for a line-style graphic with 20 or so lines...
Wipneus, using the colours in going around a 'colour wheel' provides a partial solution, at least for graphs with up to 12 colours.

Interpolating to intermediate colours in an attempt to increase the number of colours doesn't work as the shades become too difficult to distinguish.

However, you can reasonably double the number of colours by also including a corresponding wheel of darker colours, where the colour values have been reduced in approximate proportion from those in the original colour wheel.

Attached is my suggestion for RGB colour values when doing graphs with up to 24 colours.

charles_oil

  • Frazil ice
  • Posts: 285
    • View Profile
  • Liked: 13
  • Likes Given: 27
Re: Latest PIOMAS update (February)
« Reply #2724 on: February 12, 2019, 08:32:54 AM »
... or how about dashed line(s) e.g 10 yr / 5y could be dashed ?   I wouldn't do last 5 dashed as they may be close.   Or earlier ones (pre 2000 / 2010 even) as faded colours / very fine lines.


Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March)
« Reply #2725 on: March 05, 2019, 08:49:10 AM »
PIOMAS has updated the official volume data. Unfortunately the ftp server with the detailed thickness data has not been serving me for some time now. I will look into that.

Here are the volume and volume-anomaly graphs.

Jim Hunt

  • Young ice
  • Posts: 4195
    • View Profile
    • The Arctic sea ice Great White Con
  • Liked: 242
  • Likes Given: 26
Re: Latest PIOMAS update (March)
« Reply #2726 on: March 05, 2019, 10:32:55 AM »
Unfortunately the ftp server with the detailed thickness data has not been serving me for some time now. I will look into that..

That's a crying shame :(

Do you have any idea what the problem might be as yet?
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March)
« Reply #2727 on: March 05, 2019, 12:52:46 PM »
Unfortunately the ftp server with the detailed thickness data has not been serving me for some time now. I will look into that..

That's a crying shame :(

Do you have any idea what the problem might be as yet?

Yes, they have moved to https :

old  ->  new
ftp://pscftp.apl.washington.edu/zhang/PIOMAS/data   ->
https://pscfiles.apl.uw.edu/zhang/PIOMAS/data


ftp is of course designed for automated computer data transfer, while https was designed for interactive browsing (with some incidentally downloading).

Looking at the required (wget) trickery to have the same level of automatisation as before.

gerontocrat

  • First-year ice
  • Posts: 6080
    • View Profile
  • Liked: 1166
  • Likes Given: 19
Re: Latest PIOMAS update (March)
« Reply #2728 on: March 05, 2019, 01:22:40 PM »
Here is the volume data presented in the same format as I use for the JAXA ice extent tables and graphs. Still 7th lowest in the satellite record.
Note how the low volume gains at the end of the month seem to reflect the extent and area drops in the last week of February
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March)
« Reply #2729 on: March 05, 2019, 06:04:49 PM »
Since there was none last month, hre is the animation of Jan-Feb 2019.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March)
« Reply #2730 on: March 05, 2019, 06:25:12 PM »
Thickness maps, compared with previous years and differences with those.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March)
« Reply #2731 on: March 05, 2019, 06:50:14 PM »
The Fram export graph shows near normal export figures in Jan and Feb.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March mid-monthly update)
« Reply #2733 on: March 19, 2019, 11:37:50 AM »
PIOMAS has updated gridded thickness data. Volume calculated from this was 21.95 [1000km3] on the 15th of March. That would be the 7th lowest for the day.

Here is the animation of March until sofar.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March mid-monthly update)
« Reply #2734 on: March 19, 2019, 11:42:32 AM »
Volume and volume-anomaly graphs.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March mid-monthly update)
« Reply #2735 on: March 19, 2019, 12:02:38 PM »
The regional daily volume data updated:
https://sites.google.com/site/arctischepinguin/home/piomas/data/PIOMAS-regional.txt.gz

No gridded ice velocity data updated, so no new Fram export data  :'(

gerontocrat

  • First-year ice
  • Posts: 6080
    • View Profile
  • Liked: 1166
  • Likes Given: 19
Re: Latest PIOMAS update (March)
« Reply #2736 on: March 19, 2019, 12:56:32 PM »
PIOMAS Volume as at 15th March 21,954 KM3.

Here is the volume data presented in the same format as I use for the JAXA ice extent tables and graphs. Still 7th lowest in the satellite record.

Mostly above average gain.
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

wili

  • Young ice
  • Posts: 2535
    • View Profile
  • Liked: 127
  • Likes Given: 287
Re: Latest PIOMAS update (March mid-monthly update)
« Reply #2737 on: March 19, 2019, 02:41:10 PM »
Thanks tons, as always, for these amazing graphs and maps.

To me, the decadal average graph tells the clearest big-picture story of the of where we've been and where we are going.
"A force de chercher de bonnes raisons, on en trouve; on les dit; et après on y tient, non pas tant parce qu'elles sont bonnes que pour ne pas se démentir." Choderlos de Laclos "You struggle to come up with some valid reasons, then cling to them, not because they're good, but just to not back down."

uniquorn

  • Nilas ice
  • Posts: 1361
    • View Profile
  • Liked: 660
  • Likes Given: 124
Re: Latest PIOMAS update (March)
« Reply #2738 on: March 25, 2019, 12:55:32 PM »
The Fram export graph shows near normal export figures in Jan and Feb.
Is it possible for you to verify whether Fram export is thinner than previous years according to piomas?

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (March)
« Reply #2739 on: March 26, 2019, 11:56:22 AM »
The Fram export graph shows near normal export figures in Jan and Feb.
Is it possible for you to verify whether Fram export is thinner than previous years according to piomas?

Hi Uniquorn,

I have given this some thought and I'm wondering what it is you really want.

If volume export is less that can be because (not exclusive):

1. Ice thickness is less;
2. Ice thickness unchanged but concentration less.

Would calculating ice area export ( km2/month) answer your question?

uniquorn

  • Nilas ice
  • Posts: 1361
    • View Profile
  • Liked: 660
  • Likes Given: 124
Re: Latest PIOMAS update (March mid-monthly update)
« Reply #2740 on: March 26, 2019, 12:35:20 PM »
Thank you Wipneus. That is exactly the question I should have asked. If it is not too much trouble Fram export area km2/month and volume km3/month over the past 10yrs would show if there is a recent trend. (Longer if you think it is interesting enough)
Obviously I will have to be careful interpreting the data.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (April 2019)
« Reply #2741 on: April 03, 2019, 08:46:07 AM »
PIOMAS  has updated, both the volume as the gridded thickness data.
Volume on 2019-03-31 was 22.218 [1000km3], fourth lowest for the day.

Here is the animation for March 2019.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (April 2019)
« Reply #2742 on: April 03, 2019, 08:47:09 AM »
Volume and volume-anomaly graphs.

Jim Hunt

  • Young ice
  • Posts: 4195
    • View Profile
    • The Arctic sea ice Great White Con
  • Liked: 242
  • Likes Given: 26
Re: Latest PIOMAS update (April 2019)
« Reply #2743 on: April 03, 2019, 09:12:00 AM »
PIOMAS  has updated

Thanks Wipneus.

FYI: https://twitter.com/AxelSchweiger/status/1113249026973925376

and: http://GreatWhiteCon.info/2019/04/facts-about-the-arctic-in-april-2019/#Apr-03

Quote
According to the PIOMAS model Arctic sea ice volume has been flatlining for the last couple of weeks, and may even have peaked already!
« Last Edit: April 03, 2019, 09:27:50 AM by Jim Hunt »
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

Neven

  • Administrator
  • First-year ice
  • *****
  • Posts: 7074
    • View Profile
    • Arctic Sea Ice Blog
  • Liked: 662
  • Likes Given: 433
Re: Latest PIOMAS update (April 2019)
« Reply #2744 on: April 03, 2019, 09:42:56 AM »
Thanks, Wip. As for the volume graph, I find it hard to discern the 2019 trend line, because of the 2016 trend line (colours are too similar). But could be my eyes or monitor.
Il faut comparer, comparer, comparer, et cultiver notre jardin

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (April 2019)
« Reply #2746 on: April 03, 2019, 09:54:56 AM »
Thanks, Wip. As for the volume graph, I find it hard to discern the 2019 trend line, because of the 2016 trend line (colours are too similar). But could be my eyes or monitor.

Ack. That needs a fix.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (April 2019)
« Reply #2747 on: April 03, 2019, 09:58:01 AM »
Here is the thickness of 31st March, with comparisons with previous years and their differences.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0
Re: Latest PIOMAS update (April 2019)
« Reply #2748 on: April 03, 2019, 10:26:57 AM »
Fram volume(!) export was about normal for the month of March. The normals are indicated by the grey line in the background and are harder to see when exports are higher.

Wipneus

  • Citizen scientist
  • Young ice
  • Posts: 3969
    • View Profile
    • Arctische Pinguin
  • Liked: 536
  • Likes Given: 0