There are several scientific organisations that keep an eye on the Arctic sea ice cover and put out graphs to inform us of the amount of ice that is left. You can see most, if not all, of them on the ASI Graphs webpage. I expect the record on most of these graphs to be broken in weeks to come.
---
After Uni Bremen extent, Arctic ROOS area, Cryosphere Today sea ice area, DMI sea ice extent and CT Arctic Basin SIA, another big domino has fallen, one of the most popular graphs in recent years, mostly because they have downloadable daily updated data: IJIS sea ice extent.
Here's how the graph I use for ASI updates is looking right now:
The 2012 has plunged below all previous minimums, but I have to add the caveat that this is based on a preliminary data point for August 24th, which will be revised tomorrow. It needs to be revised upwards by 66 thousand square km for this record not to remain standing. Even if this happens, the record will almost certainly be broken tomorrow.
Here are the numbers for the IJIS SIE minimums in the 2005-2012 period:
- 2005: 5.315 million square km
- 2006: 5.781 million square km
- 2007: 4.255 million square km
- 2008: 4.715 million square km
- 2009: 5.250 million square km
- 2010: 4.814 million square km
- 2011: 4.527 million square km
- 2012: 4.189 million square km (and running)
Another caveat is that the IARC-JAXA Information System (IJIS) - an international collaboration between the International Arctic Research Center (IARC) in corporation with the Japan Aerospace Exploration Agency (JAXA) - has switched from the AMSR-E to the WindSat sensor, when AMSR-E stopped functioning last year. WindSat isn't as sophisticated as AMSR-E, so this could cause slight inconsistencies between the yearly numbers.
However, it seems that IJIS is soon switching to ASMR-2, the Advanced Microwave Scanning Radiometer 2, that is similar to predecessor ASMR-E, but better. All data will be consistent again when that happens. More on that later.
Next up is NSIDC daily sea ice extent or Arctic ROOS sea ice extent...
Indeed, the final IJIS SIE for Aug 28 was 3.996 M, a drop of -70.3 K for the day.
The 7-day trailing avg decrease for Aug 28 was 76.6 K.
The preliminary drop between Aug 28-29 was -83.6 K
Scorchio. Gobsmackio. This is 'Drie' ice.
Posted by: Artful Dodger | August 29, 2012 at 11:18
Roman et al, it's for IJIS data reading important to understand, that the last data point is *always* preliminary! The guiding indicator change of the 28th to the 29th is this:
28th 3947500
29th 3863906
Chng -83594 (Preliminary)
This suggests that the final will not be less than 84K as we know from observation that 9 out of 10 the Prelim is adjusted upward [the 28th by 49K]
Posted by: Seke Rob | August 29, 2012 at 11:27
IJIS continues prelim century breaks and very high loss for the season yesterday.
Matches with actual weather situation. Since yesterday and up to 3 september ECMWF and GFS show a pattern that will hit the weak band of ice north of Svalbard up to Severnaya Zemlya.
Maybe not all that 400K will melt out. It probably doesn’t lead to compaction too, just displace because there’s no blockade on the Bering side.
The patternless (and according to Healy) halved Ocean of Bits and Pieces is near.
Posted by: Werther | August 29, 2012 at 11:37
Also preliminary, the 4M to 3M [pretty please, climate gods, don't let that happen], has been pegged darker grey on the extent step chart.
http://bit.ly/IJISMD
That orange bar is much to optimistically dyed [is that how you spell that?]. Something like anoxiated blood red would be maybe better fitting.
Noted in the NY piece that had at end
That is strong coming from him.
Posted by: Seke Rob | August 29, 2012 at 11:37
Re Werther | August 29, 2012 at 11:37
The prelim loss [see my post earlier] is -84K... This comparing of upward adjust prior day final to new prelim is not the right signal transmission. No expectation of a century [on my part], as there was not one for the final of the 28th either.
Posted by: Seke Rob | August 29, 2012 at 11:42
This is part of MODIS tile r03c04, north of Frantsa Yosefa Islands. See the fierce band of clouds rushing in from the south...
Winds are 30-50 miles an hour on 850 hPa.
The wind field shifts slowly to Severnaya Zemlya in the next four days.
That whole sector is getting pounded.
The band reminds me of Isaac...
Posted by: Werther | August 29, 2012 at 12:00
Werther, what are the sfc winds? Do you know the central pressure? What sort of radius does the storm have (is that the '1 km MODIS' image)?
Cheers,
Lodger
Posted by: Artful Dodger | August 29, 2012 at 12:42
Hi Lodger,
GFS 2908 12:00 h shows sfc level winds 20-25 knots, south, Svalbard-FY Islands.
Stream on 300 hPa strong south between a deep bulge on 500 hPa level out of Kola Peninsula and the contrary in the Norwegian Sea. Reflects on sfc level in SLP 1032 Novaya zemlya and 984 hPa near Jan Mayen. That last cyclone is heading for N Greenland next three days.
Storm forecast for Frantsa Yosefa 60-70 km/hour fri/Saturday.
Detail MODIS was from 250m, north side app. 1000 km. The influx is a jetstream branc, carrying the clouds and the cyclone in it’s trail. Lot of spin.
Posted by: Werther | August 29, 2012 at 13:23
Hi Werther,
That does not sound promising for the sea ice. Strong sustained winds will break thin ice into small chunks which will churn the sfc layer. Big time bottom melt.
This is NOT Dorothy's Arctic.
Posted by: Artful Dodger | August 29, 2012 at 13:41
IJIS: prelim 3912500 km2
fixed 3996406 km2
Posted by: Espen Olsen | August 30, 2012 at 10:56
IJIS Preliminary SIE:
The latest value : 3,819,219 km2 (August 30, 2012)
Posted by: Artful Dodger | August 30, 2012 at 10:57
Dodger,
I got it wrong!
Posted by: Espen Olsen | August 30, 2012 at 10:58
IJIS update:
> 08,29,3912500 (from 3863906)
> 08,30,3819219
Posted by: Wipneus | August 30, 2012 at 10:58
Hi Espen.
The 3,912,500 km^2 is the final (revised) SIE for Aug 29, 2012.
The final daily decrease for Aug 28-29 was -83,906 km^2
The preliminary drop from Aug 29-30 is -44,687
km^2
Posted by: Artful Dodger | August 30, 2012 at 11:02
I'm sure the fine folks in Fairbanks enjoyed that ;^)
Posted by: Artful Dodger | August 30, 2012 at 11:06
Currently 2012 is 752k below 2007. If the melt in the coming weeks matches that of 2007 a final minimum of 3.5 will be reached.
But, the rate of melting is exceeding that of 2007. On Sept 1 and 2, 2007 had its first upticks of the late summer.
Don't get used to it, we will be surprised again.
Posted by: Wipneus | August 30, 2012 at 11:28
Area: 2.522 km2 anomaly : - 2.376 km2
Posted by: Espen Olsen | August 30, 2012 at 12:48
Just for fun.
AMSR2 concentration pics as animation:
http://img405.imageshack.us/img405/9336/am2anim.gif
BTW, there are some faint vein-like lines visible on the ice-pack. I wonder what those are
Posted by: Wipneus | August 30, 2012 at 13:41
Hi Wipneus,
Turn up the contrast on the SIC charts, you'll see those veins are connected areas of low concentration sea ice. Possibly flaw leads, ala Dr. David Barber's study.
Cheers,
Lodger
Posted by: Artful Dodger | August 30, 2012 at 14:05
Update:
> 08,30,3877031 (from 3819219)
> 08,31,3801406
Posted by: Wipneus | August 31, 2012 at 10:57
Yes it looks like we are stalling, and that is good, and with Nilas around Healy that confirms it!
Posted by: Espen Olsen | August 31, 2012 at 11:00
CT: 2.526 km2 anomaly - 2.360 m2
Posted by: Espen Olsen | August 31, 2012 at 12:16
The latest IJIS value : 3,740,781 km2 (September 1, 2012)
Posted by: Artful Dodger | September 01, 2012 at 11:00
Now about -771k below 2007.
If that diff stays unchanged, the minimum will be around 3.48 Mm2
Posted by: Wipneus | September 01, 2012 at 11:25
Artful Dodger wrote:
Indeed, minus 60.000 km² compared to yesterday, what a surprise!
BTW: would you be so kind to reveal this little mistery:
Why is you the others are calling you always "Lodger"?
Posted by: Kris | September 01, 2012 at 11:26
Sure, Kris.
http://www.cockneyrhymingslang.co.uk/slang/artful_dodger
Cheers,
Lodger
Posted by: Artful Dodger | September 01, 2012 at 11:44
Lodger wrote:
So, my face could be as well boat race, even with wide open a north and south?
Fascinating! :-)))
Posted by: Kris | September 01, 2012 at 13:48
Prelim-Prelim is too -60K (-60,625). For the open Rockbottom files.
The 4 way extent plot (MASIE/DMI/JAXA/NSIDC) updated [MASIE/NSIDC lag 1 day]... the rest of them too naturelmente: http://bit.ly/MASDMI
A page to watch BTW at NSIDC... the Icebridge updates and data now include Antarctic and Greenland: http://nsidc.org/data/news.html
Posted by: Seke Rob | September 01, 2012 at 13:51
Looking at the IJIS (prelim) SIE extent overlay for Sep 2nd, it seems that the holes in the pack near the Laptev bite are not closing up. Must not be freeze-up there yet...
http://www.ijis.iarc.uaf.edu/seaice/data/ALPHA/201209/AM2SI20120902IC0_overlay.png
Posted by: Artful Dodger | September 02, 2012 at 10:29
JAXA has released ver 3 of it's Level 1A dataset for AMSR-E. Now included are an additional 18 days of data spanning 01 June 2002 through 18 June 2002, which were previously unavailable.
This data has not yet appeared in the IJIS public data release, but I'm sure they're very busy over in Fairbanks these days ;^)
JAXA says "An assessment of these data collected during the initial AMSR-E evaluation period indicated that the quality of the observations is high enough to release to AMSR-E data users."
This *may* also imply that at some point in the lifecycle of AMSR2, we may get the data collected during GAC-2012 from Aug 4-8, 2012 just before AMSR2 data went operational on Aug 23nd. The data gap is a similar 19 days.
We live in hope ;^)
Cheers,
Lodger
Posted by: Artful Dodger | September 02, 2012 at 10:43
Lodger said :
Buoy 2012J (right next to the Laptev bite) seems to support that argument :
http://imb.crrel.usace.army.mil/2012J.htm
Still bottom-melting rather rigorously, although in the past few days melt is slowing down.
Posted by: Rob Dekker | September 02, 2012 at 10:55
IJIS: 3710625 km2
Posted by: Espen Olsen | September 02, 2012 at 10:56
With a final SIE decrease of -38.3 K km^2, 2012 has an 813 K km^2 lead over 2007 as of September 1st.
2007 averaged -24.5 K km^2 loss of SIE from Sep 2 to Sep 15 (the date of the 1st big stall).
So 2007 lost an additional -343 K km^2 before flattening out. If 2012 only matches 2007 for SIE loss to the stall, then 2012 will bottom out around 3.45 M km^2.
Of course, 2012 has so far shown little respect for 2007.
Cheers,
Lodger
Posted by: Artful Dodger | September 02, 2012 at 11:14
The JAXA graph appears far more dramatic than the NSIDC graph but the NSIDC is actually the more dramatic data - 842,000 sq km ahead as of 31st August suggesting a 3.3 million minimum, assuming there is no more divergence.
But divergence continues!
Posted by: Al Rodger | September 02, 2012 at 11:33
The IMS is heading south too, wonder what the Goddards and Bastardis will come up with now?
Posted by: Espen Olsen | September 02, 2012 at 11:39
As mentioned earlier, 2012 has an eeiry number of three's popping up with very high frequency. Strange, that wasn't supposed to happen...
So in honour of the 1970s Arctic Icecap, it's Tony's Greatest Hits (Sock Puppet Edition ;^)
Cheers,
Lodger
Posted by: Artful Dodger | September 02, 2012 at 11:40
North pole webcam 2 shows big area of open water:
http://psc.apl.washington.edu/northpole/NPEO2012/18.jpg
Posted by: Roman Polach | September 02, 2012 at 11:49
September 2 AM early. There is some divergence of the trend on DMI and IJIS namely DMI seems to be leveling out, and IJIS is falling rapidly, no matter what you say about the final pixels. You could say that what is left is almost all quite substantial if thinner and thinner, except for the Laptev area, but it is a bit different that what was seen last month.
Posted by: George Phillies | September 02, 2012 at 11:50
Hi Roman. That's just melt ponds and a pressure ridge. But keep watching the ice! The fact that the melt pond hasn't frozen over indicated the temps are still above zero there (melt ponds are mostly fresh water).
Cheers,
Lodger
Posted by: Artful Dodger | September 02, 2012 at 11:58
George Phillies,
There does seem to be more of a 'corner' on both DMI's 30% Extent & CT's Area.
The CT data allows me to play & I'm getting graphs like this (usually 2 clicks to 'download your attachment') which show that Area back in 2007 & 2011 were effectively flat from last week onwards, but 2012 is still dropping alarmingly. Where it will bottom out is anyone's guess. The cirve of it suggests it won't break the 2 million, but it could still well challenge it.
Posted by: Al Rodger | September 02, 2012 at 12:23
Hi Lodger, Roman:
I think what Roman means is 1st Sept image - here (sorry if link is wrong - first time embedding a link on this site). If you go straight to Webcams it never shows latest image (don't know why) - you have to go to archive to see those. On left hand side is open water - that is not a melt pond imho.
http://psc.apl.washington.edu/northpole/NPEO2012/WEBCAM2/ARCHIVE/npeo_cam2_20120901124421.jpg
Posted by: anthropocene | September 02, 2012 at 12:54
anthropocene,
Yes you right, it is not a meltpond, but the cam is also very near to open sea less than 80 kms according to Bremen!
Posted by: Espen Olsen | September 02, 2012 at 13:05
Thx, Atp! Oh yeah, that's a lead all right!
Cheers,
Lodger
Posted by: Artful Dodger | September 02, 2012 at 13:23
I think I finally managed to upload and link to my animated AMSR2 gif hosted on ArctischePinguin:
https://sites.google.com/site/arctischepinguin/home/piomas/aib/AM2anim.gif?attredirects=0
Can someone confirm whether it works?
Posted by: Wipneus | September 02, 2012 at 16:22
Wipneus:
Yes the animation works.
Posted by: Ghoti Of Lod | September 02, 2012 at 16:32
Thanks. For the record I:
- transferred the animation to a Windows PC
- used a program CumuCloud file manager to upload the animation
- found the attredirects thing by trial and luck.
Posted by: Wipneus | September 02, 2012 at 17:08
IJIS SIE:
The latest value : 3,754,844 km2 (September 2, 2012)
Posted by: Artful Dodger | September 03, 2012 at 10:56
IJIS: 3754844 KM2
Posted by: Espen Olsen | September 03, 2012 at 10:56
IJIS today 3679844 km2
Posted by: Espen Olsen | September 03, 2012 at 10:57
No, it's not freeze-up just yet ;^)
A slug of sea ice has moved South in the Greenland sea, spreading extent in that region.
Comparing the SIE extent overlays here is the best way to see the details of daily changes:
IJIS Arctic Sea Ice Monitor
If we get more winds, extent will fall further. If we don't, the pack will freeze in place.
Note that it is far better for the longevity of the pack to consolidate with low extent now, rather than to spread out and melt much more next season. Kind of a 'circle-the-wagons' analogy.
Cheers,
Lodger
Posted by: Artful Dodger | September 03, 2012 at 11:02
Espen, thanks for posting the Sep 3, 2012 provisional IJIS SIE. :^)
It's down -30.8 K from the Sep 2 provisional number. The death march continues...
Cheers,
Lodger
Posted by: Artful Dodger | September 03, 2012 at 11:14
Lodger,
Yes I am surprised with size of the drop, 2 days ago I thought we were stalling, but that seems not to be the case. I expect the area to move up and down from now on. And IMS is now were Watts, Goddard and Bastardi dont want it, although I can see Watts is getting softer on the issue, now it is more like a natural unnatural behavior!
Posted by: Espen Olsen | September 03, 2012 at 11:23
Hi Espen,
I've never visited either site. I've also never jumped off a cliff, although I'm certain that is a safer sport...
... and a more productive use of precious time.
Cheers,
Lodger
Posted by: Artful Dodger | September 03, 2012 at 11:53
Yes it looks much safer!
Posted by: Espen Olsen | September 03, 2012 at 12:02
Yup. Did you notice the name of one of the jumpers during the end credits? ;^)
Posted by: Artful Dodger | September 03, 2012 at 12:12
Lodger,
Yes I did, it is a common name in Norway, I am Norwegian myself!
Posted by: Espen Olsen | September 03, 2012 at 12:20
I thought that was you, Espen!
Modige menn, ja? Anthony er ikke blant dem, men han vil at du skal hoppe.
Skål,
Lodger
Posted by: Artful Dodger | September 03, 2012 at 12:32
Lodger,
I dont mind trekking, but jumping / climbing no thanks.
But it is always good to watch the opposition!
Posted by: Espen Olsen | September 03, 2012 at 12:39
I prefer to watch the ice... ;^)
Cheers,
Lodger
Posted by: Artful Dodger | September 03, 2012 at 12:41
Lodger,
I might be off for some trekking in Nepal in October, and hopefully studying some glaciers.
Posted by: Espen Olsen | September 03, 2012 at 12:43
इ हवे अ फ़्रिएन्द व्हो वेंट त्रेक्किंग इन नेपाल इन जनुअरी १९९६. अस फर अस इ क्नोव, हे इस स्टिल ठेरे. बे सफे, मी फ़्रिएन्द.
Posted by: Artful Dodger | September 03, 2012 at 13:13
The comments on that vid are good value:
Why do they bother with helmets?
To hold the cameras, of course...
Posted by: FrankD | September 03, 2012 at 13:27
Yeah Frank. Paraphrasing...
GJØR DETTE I NESTE SOMMER, ønsker deg lykke til og håper at vi vil bli knust i isen :D
Posted by: Artful Dodger | September 03, 2012 at 14:03
Final IJIS SIE for Sep 3, 2012: 3,746,875
The latest value : 3,683,281 km2 (September 4, 2012)
Posted by: Artful Dodger | September 04, 2012 at 10:57
That's prelim-prelim:
Date Prelim
0903 3679844
0904 3683281
Plus 3437 which I can't remember having seen since starting looking at 2012 melt data. The end is Ni, of current melt [bar compaction which has lots of space to get concentration up, to have a [small] fighting chance for 2013.
Then, when AMSR2 data is released back to start of data capture, we'll know how well WindSat was interpreted. Best they do that well after autumn has sunk in... for the 8th decimal crowd crowing that we were misled (regardless of the many other lines of evidence, that not even a seal would feel save to rest on this ice).
Posted by: Seke Rob | September 04, 2012 at 11:51
Final IJIS SIE for Sep 4, 2012: 3,726,563
The latest value : 3,628,125 km2 (September 5, 2012)
Posted by: Artful Dodger | September 05, 2012 at 10:57
Update:
> 09,03,3746875 (was 3679844)
> 09,04,3683281
AMSR2 animation
Posted by: Wipneus | September 05, 2012 at 10:57
That's a new Chicken Dinner, folks ;^) And a -55.2 K drop for Sep 4/5 prelim/prelim.
Posted by: Artful Dodger | September 05, 2012 at 10:59
Do it correctly,
> 09,03,3746875
> 09,04,3726563 (was 3683281)
> 09,05,3628125
Still no stall
Posted by: Wipneus | September 05, 2012 at 11:00
Indeed, Wipneus.
IJIS sea ice extent was inflated for 1-day-only on Sep 4 by a storm near Iceland. Strong winds whipped up ocean waves, and made the sensors go 'Chicken Oriental'.
Of course we know there's no sea ice off Iceland now since SSTs there are 8-10 C.
You can see this 'Chicken Jalfrezi' ice here on the IJIS SIE overlay for Sep 4, 2012 (it winks out again on Sep 5):
http://www.ijis.iarc.uaf.edu/seaice/data/ALPHA/201209/AM2SI20120904IC0_overlay.png
So, the melt season continues apace. And there's a 'Chicken Dipper' storm headed to take a bite out of the Laptev sea ice over the next week.
Cheers, and count yer chickens ;^)
Lodger
Posted by: Artful Dodger | September 05, 2012 at 11:31
Prefer Chicken Vindaloo [mildly hot], though Indian but for the Metropolitans like Rome or Milan is very hard to get... it requires travel here to get at the poppadoms
On extent, one has to keep an eye on the weather and the maps, as the little blib proved. In YTD JAXA history rankings, 2012 is (still) 4th, but gaining fast on 2006 3-5K a day. End of September it could be Rnk-3: http://bit.ly/JAXEXA (for fringe stats). We're on day 8 of below 4M Km^2: http://bit.ly/IJISMD
Healy aloftcam: http://icefloe.net/Aloftcon_Photos/index.php?album=2012&image=20120905-1001.jpeg at 82.33N largely low ice and wave ripples... see no nilas.
Cryosat-2 ... trust they wont come out with anymore of the "let the science community find out what's wrong with this data".
Posted by: Seke Rob | September 05, 2012 at 12:25
A little nudge more and the YTD extent reduction from max will have passed 75% and 11 million. http://bit.ly/JAXDSM
Posted by: Seke Rob | September 05, 2012 at 12:29
Final IJIS SIE for Sep 5, 2012: 3,681,094 km^2
The latest value: 3,614,219 km^2 (September 6, 2012)
Posted by: Artful Dodger | September 06, 2012 at 10:57
Update Sep 6:
> 09,05,3681094 (was 3628125)
> 09,06,3614219
Still more than 800k below 2007.
AMSR2 animation
Posted by: Wipneus | September 06, 2012 at 11:00
The ice loss (prelim) passed the 75 % mark of max. for the year.
Posted by: Espen Olsen | September 06, 2012 at 11:02
That's an IJIS final drop of -45.5 K km^2 for Sep 5, 2012.
The Sep 5/6 prelim/prelim drop is -13.9 K km^2.
Posted by: Artful Dodger | September 06, 2012 at 11:02
Some interesting stats for the AMSRx era:
Sep 5, 2012 SIE vs. Avg Minimum SIE for two periods:
2007-2010: -1.075 M km^2
2002-2006: -2.031 M km^2
So we're a million sq. km below '07-10, and TWO MILLION below '02-06.
That's right folks, 2012 is the third step on the great ziggurat of ASI collapse.
Posted by: Artful Dodger | September 06, 2012 at 11:18
Pardon, that should read "the period '07-11" above ;^)
Cheers,
Lodger
Posted by: Artful Dodger | September 06, 2012 at 11:20
Morning all,
So TWO MILLION Lodger, giving room for these SST's.
The 'unknown, unknown...'. Even so, election campaign in the Netherlands on BAU topics.
Posted by: Werther | September 06, 2012 at 11:47
Continuing the thread on the last phase of SIA/SIE reduction in the Frantsa Yosefa-Severnaya Zemlya sector.
The graph is for summer maximum temps on the Polar GMO on Hayes Island (Ostrov Kheysa). As I wrote on 29 august, GFS showed strong southerly influx for several days. It wasn't a cyclone, but a strong jet-induced stream.
While the ice lobe there weakened considerably during the last days, this graph illustrates the magnitude of this pattern.
Temps over there last week show as the longest range of 'warm' days for this summer.
This is also related to the high SST's in the region.
It will take a lot of time for refreeze conditions to settle over that region.
Posted by: Werther | September 06, 2012 at 23:10
Final IJIS SIE for Sep 6, 2012: 3,676,406 km^2
The latest value: 3,601,875 km^2 (September 7, 2012)
Posted by: Artful Dodger | September 07, 2012 at 10:57
Prelim-Prelim 'just' -14K, but final to prelim infers there's still mileage in the melt for the coming days [whilst the cyclone could be the spanner that spreads the outline so thin it falls off the counter, or compaction, or the centrifuge makes it go poof to space". DMI showed on their chart still a firmish drop [no numbers]. The zoom in suggests it's melt biting off pieces still.
(click to enlarge)
At any rate, the 2011 minimum point is 3 days away at 4526875 and 2007 is 16 days out. Do we end up with a million less to 2011? It's a toss.
Posted by: Seke Rob | September 07, 2012 at 11:19
That's a good point, Seke Rob. Here's how current IJIS SIE stands vs. previous years in the IJIS data series:
Year: vs. 2012 (as of Sep 6)
2002 -1,970,469
2003 -2,108,282
2004 -2,108,282
2005 -1,638,750
2006 -2,105,313
2007 -578,125
2008 -1,031,407
2009 -1,573,438
2010 -1,137,188
2011 -850,469
Posted by: Artful Dodger | September 07, 2012 at 11:45
Pardon, scratch '2003' above. Should be:
2003 -2,355,625
That's a doozy.
Cheers,
Lodger
Posted by: Artful Dodger | September 07, 2012 at 11:47
IJIS: today 3595781 km2
Posted by: Espen Olsen | September 08, 2012 at 10:56
Final IJIS SIE for Sep 7, 2012: 3,664,531 km^2
The latest value: 3,595,781 km^2 (September 8, 2012)
Posted by: Artful Dodger | September 08, 2012 at 10:57
(late update for yesterday)
Final IJIS SIE for Sep 8, 2012: 3,674,844 km^2
The latest value: 3593750 km^2 (September 9, 2012)
Posted by: Artful Dodger | September 10, 2012 at 10:55
IJIS today: 3695313 km2 no prelim, recovery?
Posted by: Espen Olsen | September 10, 2012 at 10:59
Final IJIS SIE for Sep 9, 2012: 3,695,313 km^2
(No prelim. yet for September 10, 2012)
Posted by: Artful Dodger | September 10, 2012 at 11:06
Still a lot of movement to be seen on the AMSR2 ice concentration images.
AMSR2 animation
Posted by: Wipneus | September 10, 2012 at 11:28
Wipneus,
I anticipate quite a bit of movement in the IJIS numbers given the impact of lows in the Canadian Arctic, Norwegian Sea, and off SW Greenland - opposite the high pressure over the Laptev and East Siberian Sea for the next few days.
I am looking at the Polar Met website for the surface temp, pressure and wind forecast.
http://polarmet.osu.edu/nwp/animation.php?model=arctic_wrf&run=00&var=plot001
Posted by: Apocalypse4Real | September 10, 2012 at 13:45
Don't worry too much about the IJIS SIE for Sep 10, 2012... they're having problems filtering out the storm surface returns again, this time North of Iceland.
Here's the SIE overlay:
http://www.ijis.iarc.uaf.edu/seaice/data/ALPHA/201209/AM2SI20120910IC0_overlay.png
In this overlay, you can see a faint outline of Iceland toward the top of the picture, then beneath (towards the N. Pole) there is a large patch of 'phantom sea ice' where SSTs are currently between +4 to +6 C.
Nothing to see, move along, resume shopping local, of course!
Cheers,
Lodger
Posted by: Artful Dodger | September 10, 2012 at 18:48
The final value : 3,671,406 km2 (September 10, 2012)
Posted by: Artful Dodger | September 11, 2012 at 10:57
IJIS: 3671406 km2 no prelim
Posted by: Espen Olsen | September 11, 2012 at 10:57
-24k, yet still +7k over the Sep 7 minimum of 3664531
AMSR2 animation
Posted by: Wipneus | September 11, 2012 at 11:02
IJIS: new record 3591250 KM2
Posted by: Espen | September 12, 2012 at 10:56
... which is a decrease of -80k
Lead over 2007 is still 752k, possibly indicating a minimum of about 3.50 Mm2
Posted by: Wipneus | September 12, 2012 at 11:09
With that latest entry [no more prelims, only finals], the IJIS Extent YTD average has been promoted [facetious] from rank 4 to rank 3, moving past 2006.
http://bit.ly/JAXEXA
http://bit.ly/JAXEXM
Next one to be hit is 2007 YTD average, but that's still a little out. The gain of 2012 on that record year is -3K per day, and rising. [Fringe records zone]
The step chart has resumed counting up, skipped from hold on day 10 to day 14 running, since passing the 4 million mark [day #254 of year], i.e. we have that new record low of under 3.6 million square km.
http://bit.ly/IJISMD
(sorry if you get old charts served... Google/Photobucket cache mirroring is slow... if they detect only a small image change, they wont replicate)
Posted by: Seke Rob | September 12, 2012 at 11:31
Had not registered before, but that brings the YTD melt from maximum to present minimum to 75.12%
http://bit.ly/JAXDSM
Posted by: Seke Rob | September 12, 2012 at 11:35
Seke,
To avoid those cache problems, try a low tech solution, allocate one of the corners of the chart, a square or a rectangular, end then change background color of these from black to red or something very opposite?
Posted by: Espen | September 12, 2012 at 11:42