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Espen

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Re: IJIS/JAXA
« Reply #350 on: August 12, 2013, 10:59:31 AM »
IJIS:

6,274,844 km2 (August 11, 2013)  down 53,437 km2 from previous.


967,813 km2 above 2012.
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Re: IJIS/JAXA
« Reply #351 on: August 13, 2013, 10:56:20 AM »
IJIS:

6,235,938 km2 (August 12, 2013) down 38,906 km2 from previous.

974,688 km2 above 2012.
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Re: IJIS/JAXA
« Reply #352 on: August 14, 2013, 10:57:20 AM »
IJIS:

6,152,500 km2 (August 13, 2013) down 89,531 km2 from previous (revised)

973,750 km2 above 2012.
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Re: IJIS/JAXA
« Reply #353 on: August 15, 2013, 10:56:47 AM »
IJIS:


6,096,719 km2 (August 14, 2013) down 55,781 km2 from previous.

994,063 km2 above 2012.
Have a ice day!

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Re: IJIS/JAXA
« Reply #354 on: August 16, 2013, 10:56:25 AM »
IJIS:

6,011,406 km2 (August 15, 2013) down 85,313 km2 from previous.

970,468 km2 above 2012.

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Re: IJIS/JAXA
« Reply #355 on: August 17, 2013, 11:09:11 AM »
IJIS:

5,867,813 km2 (August 16, 2013)  down 143,593 km2 from previous.

928,125 km2 above 2012.
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Tor Bejnar

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Re: IJIS/JAXA
« Reply #356 on: August 17, 2013, 05:57:41 PM »
That is the first IJIS century drop in a while!
At this days rate of gain on 2012, we'll get ahead of 2012 in 22 days! 
But I know cherry picking when I do it! ;D
Arctic ice is healthy for children and other living things because "we cannot negotiate with the melting point of ice"

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Re: IJIS/JAXA
« Reply #357 on: August 18, 2013, 11:05:57 AM »
IJIS:

No update out for Sushi!
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Frivolousz21

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Re: IJIS/JAXA
« Reply #358 on: August 18, 2013, 11:37:28 AM »
Jamstec website shows windsat froze up only after one scan on the 16th. 

I really hope they use amsr2 the rest of the season
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Wipneus

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Re: IJIS/JAXA
« Reply #359 on: August 18, 2013, 11:38:13 AM »
Nothing for Aug 17. Very little data for Aug 16:


Frivolousz21

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Re: IJIS/JAXA
« Reply #360 on: August 19, 2013, 10:23:09 AM »
wind-sat is still dark.

No update today unless we see AMSR2 come off the bench
I got a nickname for all my guns
a Desert Eagle that I call Big Pun
a two shot that I call Tupac
and a dirty pistol that love to crew hop
my TEC 9 Imma call T-Pain
my 3-8 snub Imma call Lil Wayne
machine gun named Missy so loud
it go e-e-e-e-ow e-e-e-e-e-e-blaow

Espen

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Re: IJIS/JAXA
« Reply #361 on: August 19, 2013, 10:58:44 AM »
IJIS:

Houston, we have a problem!

No update today.
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Artful Dodger

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Re: IJIS/JAXA
« Reply #362 on: August 19, 2013, 11:14:12 AM »
Hmm, more like "Fairbanks, we have a problem". GCOM-W1 data is still flowing over at JAXA. I will attach a 10km Sea Ice Concentration (SIC) map for Aug 17, 2013 in a moment.

Please stand by...  ::)

EDIT: SIC chart from GW1AM2_20130817_01D_PNMD_L3SGSICHA1100100 data attached. Map specs as follows:
  • created from L3 data (Level 3 - map)
  • 10 km per pixel native (data) resolution
  • North Polar map projection
  • Standard parallel 135 degrees (Greenland down)
  • 5 colour bins for SIC
Note: L1B, L1R, AND L2 data are flowing as expected (Brightness temperatures, Orbital swath data, and Map data, respectively, with the expected time lag required for data processing).
« Last Edit: August 19, 2013, 11:58:18 AM by Artful Dodger »
Cheers!
Lodger

Frivolousz21

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Re: IJIS/JAXA
« Reply #363 on: August 19, 2013, 11:23:32 AM »
Hmm, more like "Fairbanks, we have a problem". GCOM-W1 data is still flowing over at JAXA. I'll attach a 10km SIC map for Aug 17, 2013 in a moment.

Please stand by...  ::)

that's not the issue.  They still use Wind-sat data for the numerical value.

I got a nickname for all my guns
a Desert Eagle that I call Big Pun
a two shot that I call Tupac
and a dirty pistol that love to crew hop
my TEC 9 Imma call T-Pain
my 3-8 snub Imma call Lil Wayne
machine gun named Missy so loud
it go e-e-e-e-ow e-e-e-e-e-e-blaow

Artful Dodger

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Re: IJIS/JAXA
« Reply #364 on: August 19, 2013, 12:01:42 PM »
Hmm, more like "Fairbanks, we have a problem". GCOM-W1 data is still flowing over at JAXA. I'll attach a 10km SIC map for Aug 17, 2013 in a moment.

Please stand by...  ::)

that's not the issue.  They still use Wind-sat data for the numerical value.
Hi Friv,  ;)

I think Vergent has shown otherwise. At any rate, Wipneus' data is based on AMSR2 89 MHz data received through DMI, so I hope we will continue receiving those updates.

Of course, you could well be right about IJIS! This event will likely lay that question to rest ;)

I really should continue this over on Wipneus' Home Brew tread, so apologies if I cut over to there to continue...

Have a great week, Friv!  8)
« Last Edit: August 19, 2013, 12:09:19 PM by Artful Dodger »
Cheers!
Lodger

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Re: IJIS/JAXA
« Reply #365 on: August 19, 2013, 12:22:38 PM »
Lodger,

While my argument was valid, it was not sound. Wipneus later proved to me that, contrary to their news release, they were still using windsat for numerical data.

Vergent

Wipneus

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Re: IJIS/JAXA
« Reply #366 on: August 19, 2013, 12:29:20 PM »
Lodger,

I have explained how we are sure that Windsat is used here

Basically I don't think the announcement of the most accurate extent data is not going without a press release.

I speculate that the improved measurements and the refinements in the algorithm will allow them to lower the 15% cutoff for extent to perhaps 7.5% .

Frivolousz21

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Re: IJIS/JAXA
« Reply #367 on: August 19, 2013, 12:41:43 PM »
Does anyone know if windsat has passed away or is just injured?

And if windsat comes back say in 2 days how do they fill the data in?

Considering the odds of open water at 85N+ is so high.  They will have to infill for windsat in that case.

I got a nickname for all my guns
a Desert Eagle that I call Big Pun
a two shot that I call Tupac
and a dirty pistol that love to crew hop
my TEC 9 Imma call T-Pain
my 3-8 snub Imma call Lil Wayne
machine gun named Missy so loud
it go e-e-e-e-ow e-e-e-e-e-e-blaow

Artful Dodger

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Re: IJIS/JAXA
« Reply #368 on: August 19, 2013, 12:47:48 PM »
Wipneus later proved to me that, contrary to their news release, they were still using windsat for numerical data.

I have explained how we are sure that Windsat is used here

Ah, okay that makes good sense. Thanks, fellows!

Still not sure how the WindSat hiccup affected the Home Brew SIE on the 16/17, but data is flowing now so all is well. 8)
Cheers!
Lodger

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Re: IJIS/JAXA
« Reply #369 on: August 19, 2013, 12:54:57 PM »
Hmm, did I not mention that data has been fully restored for both 16th and 17th?

Probably just a local problen in Hambug KlimaCampus, fixed quite late because it was weekend.

Espen

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Re: IJIS/JAXA
« Reply #370 on: August 21, 2013, 10:57:30 AM »
IJIS:

Out of order!
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Wipneus

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Re: IJIS/JAXA
« Reply #371 on: August 22, 2013, 09:07:32 AM »
Windsat is available.
Also JASMES is updating now.

I expect IJIS will follow soon.

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Re: IJIS/JAXA
« Reply #372 on: August 22, 2013, 10:57:54 AM »
IJIS:

Nope, still out of order!

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Wipneus

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Re: IJIS/JAXA
« Reply #373 on: August 22, 2013, 04:13:01 PM »
For those who cannot wait for the IJIS/Jaxa numbers based on the superior AMSR2 measurements, I have calculated etxent (and area) from the L3 data Sea Ice Concentration data.
This data is on a Polar Stereographic grid with nominal cell dimension of 10km. Calculated with the special Bootstrap algorithm (different from NSIDC, differs from Hamburg/Bremen).

I am using for now the Descending data, not sure why it is separate from the Ascending. I fill the pole hole with ice of the same concentration as its rim and only include ice in the 14 well-know regions (no lakes and no Baltic ice in particular).

The data is updated one day later than IJIS and NSIDC, so last day in the graph is August 20.

I have added lines to the extent, area and compactness graphs presented in the "home brew" thread. Hope that it does not get too confusing:






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Re: IJIS/JAXA
« Reply #374 on: August 23, 2013, 02:32:00 AM »
IJIS/JAXA is back!  Woo hoo.

8/16: 5915000 [-96k] (revised)
8/17: 5891250 [-24k]
8/18: 5887656 [-04k]
8/19: 5808281 [-79k]
8/20: 5748438 [-60k]
8/21: 5706719 [-42k]
 
Currently in 5th place.  1.17M above 2012.  2k below 2010.

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Re: IJIS/JAXA
« Reply #375 on: August 23, 2013, 02:42:01 AM »
That is the first IJIS century drop in a while!
At this days rate of gain on 2012, we'll get ahead of 2012 in 22 days! 
But I know cherry picking when I do it! ;D

Unfortunately, during the long blackout, they revoked the century drop.  That was a big revision.

2013 has had no century drops in the past two weeks.  For comparison, 2012 had *5*.  However, this year's lack is not so strange.  Most other years have had 0 or 1 during this same period.

Frivolousz21

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Re: IJIS/JAXA
« Reply #376 on: August 23, 2013, 03:15:07 AM »
There is no windsat data for the 20th or 21st. 

How can they have numbers?
I got a nickname for all my guns
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it go e-e-e-e-ow e-e-e-e-e-e-blaow

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Frivolousz21

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Re: IJIS/JAXA
« Reply #378 on: August 23, 2013, 10:11:24 AM »
When I made the post there wasn't on the Jamstec site.

Now it's updated through the 22nd.

I got a nickname for all my guns
a Desert Eagle that I call Big Pun
a two shot that I call Tupac
and a dirty pistol that love to crew hop
my TEC 9 Imma call T-Pain
my 3-8 snub Imma call Lil Wayne
machine gun named Missy so loud
it go e-e-e-e-ow e-e-e-e-e-e-blaow

Espen

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Re: IJIS/JAXA
« Reply #379 on: August 23, 2013, 10:56:19 AM »
IJIS:

5,660,781 km2 (August 22, 2013) down 45,983 km2 from previous.

1,204,062 km2 above 2012.
Have a ice day!

Espen

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Re: IJIS/JAXA
« Reply #380 on: August 25, 2013, 08:06:11 PM »
5,619,531 km2 (August 24, 2013)  down 22,344 km2 form previous.

1,410,312 km2 above 2012.
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Re: IJIS/JAXA
« Reply #381 on: August 25, 2013, 09:50:16 PM »
There was a 220K drop on this day last year?
Any sufficiently advanced technology is indistinguishable from magic.

Espen

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Re: IJIS/JAXA
« Reply #382 on: August 26, 2013, 10:57:09 AM »
IJIS:

5,589,531 km2 (August 25, 2013) down 30,000 km2 from previous.

1,451,406 km2 above 2012.
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Wipneus

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Re: IJIS/JAXA
« Reply #383 on: August 27, 2013, 11:05:24 AM »
A drop of -89k4, but it is based on few 3 swaths:


Espen

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Re: IJIS/JAXA
« Reply #384 on: August 27, 2013, 11:10:40 AM »
IJIS:

5,500,156 km2 (August 26, 2013)  down 89,375 km2 from previous.

1,403,593 km2 above 2012.
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Wipneus

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Re: IJIS/JAXA
« Reply #385 on: August 29, 2013, 09:10:10 AM »

Espen

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Re: IJIS/JAXA
« Reply #386 on: August 30, 2013, 10:56:21 AM »
IJIS:

5,341,250 km2 (August 28, 2013) 
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Espen

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Re: IJIS/JAXA
« Reply #387 on: August 30, 2013, 10:57:31 AM »
IJIS:

5,379,063 km2 (August 29, 2013)

1,466,563 km2 above 2012
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Re: IJIS/JAXA
« Reply #388 on: August 30, 2013, 11:13:41 AM »
A drop of -89k4, but it is based on few 3 swaths:
It's interesting to compare that image to the ASCAT-based classification from the same day:



They seem to be seeing practically the same thing, at least in the Laptev and Kara seas. 


Espen

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Re: IJIS/JAXA
« Reply #389 on: August 31, 2013, 10:56:18 AM »
IJIS:

5,333,594 km2 (August 30, 2013)  down 45,469 km2 from previous.

1,456,563 km2 above 2012.
Have a ice day!

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Re: IJIS/JAXA
« Reply #390 on: August 31, 2013, 10:51:53 PM »
I think we are very close to a refreeze?
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Vergent

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Re: IJIS/JAXA
« Reply #391 on: September 01, 2013, 03:01:40 AM »
I think we are very close to a refreeze?
Northern_Hemisphere, (1) Beaufort, (2) Chukchi, (3) East_Siberian, (4) Laptev_Sea, (5) Kara_Sea,

2013239, 5659469.35,  812319.24,  405290.37,  674062.95,  281345.58,   82981.58,
2013240, 5559450.10,  798247.95,  405359.82,  644663.26,  258900.12,   79203.78,
2013241, 5504078.49,  796744.23,  404301.07,  619769.70,  247684.24,   82777.30,       
2013242, 5319528.10,  793570.65,  335864.40,  590492.90,  191338.35,   82777.30,

MASIE dropped 185k, 334k in three days. Models suggest the compaction should continue for a week.

Vergent

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Re: IJIS/JAXA
« Reply #392 on: September 01, 2013, 06:21:41 AM »


Vergent

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Re: IJIS/JAXA
« Reply #393 on: September 01, 2013, 06:42:43 PM »
Ijis:

5,311,875 km2 (August 31, 2013) down 25,871 km2 from previous.

1,475,625 km2 above 2012.
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Espen

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Re: IJIS/JAXA
« Reply #394 on: September 02, 2013, 10:56:25 AM »
IJIS:

5,294,844 km2 (September 1, 2013) down 17,031 km2 from previous.

1,496,875 km2 above 2012.
Have a ice day!

Espen

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Re: IJIS/JAXA
« Reply #395 on: September 03, 2013, 10:58:03 AM »
IJIS:

5,240,625 km2 (September 2, 2013)  down 54,219 km2 from previous.

1,485,781 km2 above 2012.
Have a ice day!

Espen

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Re: IJIS/JAXA
« Reply #396 on: September 04, 2013, 10:56:15 AM »
IJIS:

5,128,750 km2 (September 3, 2013)  down 111,875 km2 from previous.

1,381,875 km2 above 2012.
Have a ice day!

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Re: IJIS/JAXA
« Reply #397 on: September 04, 2013, 10:59:09 AM »
An unexpected century ???
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Lennart van der Linde

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Re: IJIS/JAXA
« Reply #398 on: September 04, 2013, 11:12:11 AM »
Wow, what's going on there!?

fishmahboi

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Re: IJIS/JAXA
« Reply #399 on: September 04, 2013, 11:15:05 AM »
I guess it's either an error or there must be some strong bottom melting going on.