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meddoc

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Re: Latest PIOMAS update (March mid monthly update)
« Reply #2300 on: April 02, 2018, 02:44:17 PM »
Given ongoing Extreme Weather Patterns I highly doubt, that this PIOMAS Figure is correct.
Just go outside for a Day & feel at what force Winds are blowing meridionally, N->S and viceversa.

Wipneus

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Re: Latest PIOMAS update (April update)
« Reply #2301 on: April 03, 2018, 01:55:31 PM »
Gridded PIOMAS thickness data was released, not yet the official volume data and graphs last time I looked.

Here is the animation for March 2018.

Wipneus

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Re: Latest PIOMAS update (April update)
« Reply #2302 on: April 03, 2018, 02:01:50 PM »
With a volume of 21.9 [1000 km3], 2018 is still second lowest. Much closer to third than the first place though.

Attached volume and volume anomaly graphs.

Wipneus

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Re: Latest PIOMAS update (April update)
« Reply #2303 on: April 03, 2018, 02:07:54 PM »
The updated Fram export graph.

Tor Bejnar

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Re: Latest PIOMAS update (April update)
« Reply #2304 on: April 03, 2018, 04:29:47 PM »
March 2017 had (very approximately) three times the Fram export of ice that of March 2018.  (January and February had vaguely similar export amounts this and last year.)
Arctic ice is healthy for children and other living things.

uniquorn

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Re: Latest PIOMAS update (April update)
« Reply #2305 on: April 03, 2018, 06:06:30 PM »
March 2017 had (very approximately) three times the Fram export of ice that of March 2018.  (January and February had vaguely similar export amounts this and last year.)
Yes. Not much MYI this year.

Blizzard92

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Re: Latest PIOMAS update (April update)
« Reply #2306 on: April 04, 2018, 07:26:02 PM »
UC Irvine - Earth System Science Ph.D. Candidate
Cornell University - Atmospheric Sciences B.Sc.

Twitter: @ZLabe
Website: http://sites.uci.edu/zlabe/

Neven

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Re: Latest PIOMAS update (April update)
« Reply #2307 on: April 04, 2018, 11:27:15 PM »
Zack, if it isn't too much trouble, could you update this temperature graph (the one at the bottom of the page, with the rankings)? I'd like to use it for the PIOMAS update:

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Blizzard92

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Re: Latest PIOMAS update (April update)
« Reply #2308 on: April 04, 2018, 11:43:25 PM »
Zack, if it isn't too much trouble, could you update this temperature graph (the one at the bottom of the page, with the rankings)? I'd like to use it for the PIOMAS update:



No problem! It should be updated now at http://sites.uci.edu/zlabe/arctic-temperatures/. Thanks!
UC Irvine - Earth System Science Ph.D. Candidate
Cornell University - Atmospheric Sciences B.Sc.

Twitter: @ZLabe
Website: http://sites.uci.edu/zlabe/

Neven

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Re: Latest PIOMAS update (April update)
« Reply #2309 on: April 05, 2018, 09:52:49 AM »
That's great, thanks.
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Neven

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Re: Latest PIOMAS update (April update)
« Reply #2310 on: April 05, 2018, 06:45:12 PM »
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litesong

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Re: Latest PIOMAS update (April update)
« Reply #2311 on: April 05, 2018, 07:07:44 PM »
With a volume of 21.9 [1000 km3], 2018 is still second lowest.
Average Arctic sea ice VOLUME for April 1, for the period 1980-89, was ~30,200 cubic kilometers. April 1, 2018 Arctic sea ice VOLUME is ~21,900 cubic kilometers, ~ 8300 cubic kilometers LESS than the 1980-89 average for April 1.
Like 2015, 2016 & 2017, 2018 Arctic sea waters(which used to be ice & reflected solar energy to space)  have set themselves up to absorb much excess AGW predicted solar energy, while the sun is at its approaching maximum elevations in the sky. Any downwellings in those .5+ million square kilometers excess AGW generated waters, will transport excess AGW solar absorbed energy directly downward to Arctic continental shelves or into deeper Arctic waters, for storage.... energies that had not been available previously to the Earth. It has also been determined that excess solar energy can be absorbed through thin AGW generated ice when the sun is at its highest elevations in the Arctic....even more energy stored in Arctic waters.
////////
For half a century(+?), the solar TSI has been languid. For 11+ years the solar TSI has been well below average(including a 3+ year low period setting a 100 year record). For many years, due to the low solar TSI, AGW deniers have declared an ice age.
But Earth has NOT even returned to early 20th century low temperatures. For 395+ STRAIGHT months Earth temperatures have been over the 20th century average. AGW deniers should be happy there are no gay activities. ;D The first decade of the 21st century has been the hottest recorded decade, also including the 20th & 19th century recorded temperatures. The last five years have been the hottest 5 year recorded period, including the 21st, 20th, & 19th centuries. 2014, 2015, 2016, & 2017 has been the hottest recorded successive years, including the 21st, 20th, & 19th centuries. All this while solar TSI is low, which science says is only a blip low. For billions of years, the sun has continued to warm & WILL continue to warm. Once solar TSI becomes its normal, higher(& higher, still) self, Earth temperatures (already escalating), will take a faster elevator, upward!
//////
On January 1, average Arctic sea ice extent for the 1980's was 14.52 million KM2. Like 2015, 2016, 2017 & now 2018,  MAXIMUM Arctic sea ice extent did not reach 14 million square kilometers. Indeed, 3 months of Arctic sea ice freezing has disappeared!!
« Last Edit: April 06, 2018, 06:14:40 AM by litesong »

seaice.de

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Re: Latest PIOMAS update (April update)
« Reply #2312 on: April 09, 2018, 07:36:13 PM »
 A comparison of SMOS and PIOMAS sea ice thickness anomalies (baseline mean since 2011).

uniquorn

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Re: Latest PIOMAS update (April update)
« Reply #2313 on: April 09, 2018, 08:10:59 PM »
Thank you seaice.de.
That does not look good. All the positive anomalies are in areas that are likely to melt out.

numerobis

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Re: Latest PIOMAS update (April update)
« Reply #2314 on: April 09, 2018, 09:29:39 PM »
Those anomalies look like less ice went through Fram than usual, but more through Nares.

Does SMOS have a more recent baseline than PIOMAS? They seem to be showing almost the same information, just shifted.

uniquorn

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Re: Latest PIOMAS update (April update)
« Reply #2315 on: April 10, 2018, 05:02:12 PM »
could be that SMOS takes longer to gather the data.

I think the CAA anomaly is due to persistant CAA export (aka garlic press) as well as temp, mobility etc.
Ascat ~Aug2016-Apr2018 (every 4days to reduce file size)
thanks to A-team for tips on ascat graphics

edit: some of that MYI may still be working it's way through to Baffin Bay.
edit: after looking again, some more MYI is making it's way around the Beaufort
« Last Edit: April 11, 2018, 01:59:22 PM by uniquorn »

VeliAlbertKallio

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Re: Latest PIOMAS update (April update)
« Reply #2316 on: April 15, 2018, 12:22:21 PM »
Rapid Ice Loss and United Nations General Assembly Motion 101292 (ref. UNFCCC-TAL-SRS/02/04/2018) - Rapid Loss of Sea/Land Ice Presented to UN General Assembly after Rio Earth Summit

United Nations Secretary-General Javier Pérez de Cuéllar issued authorization for the Hopi Nation to present their ethnoclimatology motion to the UN General Assembly which stated that any sustained warming on the Polar Regions would result in very rapid loss of ice, the investigation request remained languishing then in UN files for the following 26 years. After the Copenhagen Summit COP15 failed to continue pursuing the Kyoto Protocol route COP3 and the Bali Road Map COP13 (leading to nearly 10-year hiatus until the Paris Agreement), the UNESCO delegation of Bolivia in Paris and His Excellency Evo Morales asked me to present about the UN whereabouts of the matter at the Cochabamba Climate Summit (CMPCC), this UNFCCC-TAL-SRS02/04/2018 is a further to ask UN to respond on the First Nations of Americas 1992 statement that any sustained warming (succession of consequtive warm summers in the Arctic) would very rapidly damage ice. This re-presents some of the CMPCC arguments, the new UN motion also clarifies on matters as the First Nations of Americas traditional position on geoengineering and modifications of weather:

https://www.academia.edu/36396474/United_Nations_General_Assembly_Motion_101292_for_UNFCCCs_Talanoa_Dialogue

With a volume of 21.9 [1000 km3], 2018 is still second lowest.
Average Arctic sea ice VOLUME for April 1, for the period 1980-89, was ~30,200 cubic kilometers. April 1, 2018 Arctic sea ice VOLUME is ~21,900 cubic kilometers, ~ 8300 cubic kilometers LESS than the 1980-89 average for April 1.
Like 2015, 2016 & 2017, 2018 Arctic sea waters(which used to be ice & reflected solar energy to space)  have set themselves up to absorb much excess AGW predicted solar energy, while the sun is at its approaching maximum elevations in the sky. Any downwellings in those .5+ million square kilometers excess AGW generated waters, will transport excess AGW solar absorbed energy directly downward to Arctic continental shelves or into deeper Arctic waters, for storage.... energies that had not been available previously to the Earth. It has also been determined that excess solar energy can be absorbed through thin AGW generated ice when the sun is at its highest elevations in the Arctic....even more energy stored in Arctic waters.
////////
For half a century(+?), the solar TSI has been languid. For 11+ years the solar TSI has been well below average(including a 3+ year low period setting a 100 year record). For many years, due to the low solar TSI, AGW deniers have declared an ice age.
But Earth has NOT even returned to early 20th century low temperatures. For 395+ STRAIGHT months Earth temperatures have been over the 20th century average. AGW deniers should be happy there are no gay activities. ;D The first decade of the 21st century has been the hottest recorded decade, also including the 20th & 19th century recorded temperatures. The last five years have been the hottest 5 year recorded period, including the 21st, 20th, & 19th centuries. 2014, 2015, 2016, & 2017 has been the hottest recorded successive years, including the 21st, 20th, & 19th centuries. All this while solar TSI is low, which science says is only a blip low. For billions of years, the sun has continued to warm & WILL continue to warm. Once solar TSI becomes its normal, higher(& higher, still) self, Earth temperatures (already escalating), will take a faster elevator, upward!
//////
On January 1, average Arctic sea ice extent for the 1980's was 14.52 million KM2. Like 2015, 2016, 2017 & now 2018,  MAXIMUM Arctic sea ice extent did not reach 14 million square kilometers. Indeed, 3 months of Arctic sea ice freezing has disappeared!!
« Last Edit: April 16, 2018, 04:21:32 PM by VeliAlbertKallio »

Wipneus

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Re: Latest PIOMAS update (April mid-monthly update)
« Reply #2317 on: April 19, 2018, 03:32:52 PM »
PIOMAS gridded thickness data was updated to 15th April.
 
The annual max seems not to have been reached, see attached volume and volume anomaly graphs.

Wipneus

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Re: Latest PIOMAS update (April mid-monthly update)
« Reply #2318 on: April 19, 2018, 03:35:22 PM »
The animation up to 15 April.

Wipneus

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Re: Latest PIOMAS update (April mid-monthly update)
« Reply #2319 on: April 19, 2018, 03:43:01 PM »
Little Fram export in the first half of April.

Neven

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Re: Latest PIOMAS update (April mid-monthly update)
« Reply #2320 on: April 19, 2018, 03:49:14 PM »
Thanks, Wip.  :)
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Wipneus

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Re: Latest PIOMAS update (April mid-monthly update)
« Reply #2321 on: April 27, 2018, 12:47:28 PM »
PIOMAS has updated the so called gice data (upto 22th of April). As some will remember, ice in each gridcell in the PIOMAS model is specified as a discrete distribution: there exist 12 categories of ice thickness (m):
[0.00, 0.26, 0.71, 1.46, 2.61, 4.23, 6.39, 9.10, 12.39, 16.24, 20.62, 25.49]
gice specifies the percentage less or equal to the thickness of each category.

From these I calculate total area occupied for each cat as shown in the attached graph.

PIOMAS has the lowest area on the 22 April of all years, but more of that ice is thicker than in some recent years.


Neven

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Re: Latest PIOMAS update (April mid-monthly update)
« Reply #2322 on: April 28, 2018, 09:29:56 PM »
Ask in the extent and area data thread. This is PIOMAS (volume).
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uniquorn

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Re: Latest PIOMAS update (March update)
« Reply #2323 on: April 30, 2018, 09:44:16 PM »
Thank you Wipneus.
I also note that the animation shows an area of very thick ice north of the New Siberian islands. I wonder if it's really there, and if so what effect will it have on the melting season. Maybe it's the result of wind compaction events from both the Pacific and the Atlantic sides.
I was checking back on last year's ascat. It looks like it's last year ice that drifted to mid arctic and back out, then compaction. The animation is of 2017 from dec-jan (reversed), every other day(to reduce file size). Tricky to follow.
Sorry if using ascat on this thread is off topic.
edit: delay was a 140, changed to 200

tech notes:
imagej: br/cont 43,241 clahe 63,256,2.2 reverse, substack 1-357-2, usm .25
gimp: dup final frame, del 200ms
« Last Edit: April 30, 2018, 10:24:39 PM by uniquorn »

Wipneus

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Re: Latest PIOMAS update (May)
« Reply #2324 on: May 05, 2018, 04:28:12 PM »
PIOMAS gridded thickness data has updated. The official volume data not yet, so what follows are my calculations that can slightly differ.
Last value (30 April) was 22.29 [103km3]. That is third place but the difference with 2011 is too close to be sure: 22.28 [103km3].

Attached is the animation for April.
 

Wipneus

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Re: Latest PIOMAS update (May)
« Reply #2325 on: May 05, 2018, 05:21:49 PM »
Volume and volume-anomaly graphs attached. The maximum is very flat, melting hardly noticeable. 2011,2016 and 2018 volumes are nearly equal.

Wipneus

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Re: Latest PIOMAS update (May)
« Reply #2326 on: May 05, 2018, 06:30:57 PM »
Volume export through the Fram is rather low.

SteveMDFP

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Re: Latest PIOMAS update (May)
« Reply #2327 on: May 05, 2018, 06:35:23 PM »
Volume export through the Fram is rather low.

I believe it's long been true that Fram export is most prominent in the winter, and sluggish in the summer.

Perhaps now the pattern is falsely exaggerated by so much summer ice melting before it has a chance to get anywhere near the Fram?  I suppose there's no feasible way to measure melted-ice water export through the Fram.

Wipneus

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Re: Latest PIOMAS update (May)
« Reply #2328 on: May 05, 2018, 07:01:01 PM »
Volume export through the Fram is rather low.

I believe it's long been true that Fram export is most prominent in the winter, and sluggish in the summer.

Perhaps now the pattern is falsely exaggerated by so much summer ice melting before it has a chance to get anywhere near the Fram?  I suppose there's no feasible way to measure melted-ice water export through the Fram.

There is a long-time downward trend yes, but the noise (year-to-year fluctuations) dominates.

Long time average for April is about 0.22 [1000 km3/month], April 2018 is far below that.

(note to myself:  put that in the graph as well).

Wipneus

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Re: Latest PIOMAS update (May)
« Reply #2329 on: May 05, 2018, 07:02:59 PM »
Thickness maps for 30 April 2018, compared with previous years.

Wipneus

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oren

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Re: Latest PIOMAS update (May)
« Reply #2331 on: May 05, 2018, 07:48:02 PM »
Very interesting. Extra volume over previous low years resides in the Barents, Kara, Laptev and Hudson. Not exactly where I expected it, and some of this advantage could disappear early in the season, especially in the Barents. Kara and Hudson could potentially resist melt longer although the end result is guaranteed, while Laptev in principle could avoid melt-out as it also did in 2016 and 2017. It will all be very interesting to watch.
« Last Edit: May 05, 2018, 08:07:03 PM by oren »

magnamentis

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Re: Latest PIOMAS update (May)
« Reply #2332 on: May 05, 2018, 08:45:51 PM »
Very interesting. Extra volume over previous low years resides in the Barents, Kara, Laptev and Hudson. Not exactly where I expected it, and some of this advantage could disappear early in the season, especially in the Barents. Kara and Hudson could potentially resist melt longer although the end result is guaranteed, while Laptev in principle could avoid melt-out as it also did in 2016 and 2017. It will all be very interesting to watch.

the fact it's in unexpected places is probably due to the increased mobility of the ice. for now this can take thick ice into un-common places where it under certain circumstances could even survive a summer, but ultimately to see thick ice in warmer places and it being replace by thin ice where it usually could be found will sooner or later mean sudden death for more ice in larger parts of the arctic. i'm sure you see this similarly, just adding the thought here.
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oren

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Re: Latest PIOMAS update (May)
« Reply #2333 on: May 05, 2018, 08:48:46 PM »
Here are a couple of graphs for day 120 (~Apr 30th). The first shows the seas mentioned above that are at their highest level since 2009/2010, while the second shows those that are at record low - Bering, Chukchi, and the Greenland Sea.

Neven

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Re: Latest PIOMAS update (May)
« Reply #2334 on: May 06, 2018, 10:23:15 AM »
I've downloaded the updated data from the PSC website, but when opening the .dat file I get this weird signs, and it won't open properly. Do you guys have the same problem?

And another question. There's a map posted showing April CryoSat anomaly: "Fig 9. Ice Thickness Anomaly for April 2018 from and CryoSAT AWI (Version 2). Data provided by S. Hendricks and R. Ricker at AWI." Is this the anomaly from PIOMAS (ie, AWI subtracted from PIOMAS)?

Edit: Got it now. It's the CryoSat Anomaly vs 2011-2017.
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Neven

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Re: Latest PIOMAS update (May)
« Reply #2335 on: May 06, 2018, 10:49:24 AM »
I've downloaded the updated data from the PSC website, but when opening the .dat file I get this weird signs, and it won't open properly. Do you guys have the same problem?

You don't have the same problem, unless you made the same mistake I did. Solved now.

Answering my own questions today. A good omen.  ;)
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Steven

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Re: Latest PIOMAS update (May)
« Reply #2336 on: May 06, 2018, 11:51:52 AM »
There's a map posted showing April CryoSat anomaly
...
It's the CryoSat Anomaly vs 2011-2017.


Cryosat and PIOMAS seem to be in broad agreement.  Both of them have thicker than normal ice (compared to 2011-2017) in the Laptev Sea and adjacent regions, and thinner than normal ice in the Chukchi Sea, Canada Basin, Lincoln and Greenland Sea.



Overall, Cryosat sea ice volume for the Arctic Basin seems to be close to the 2011-2017 average.
https://spaces.awi.de/confluence/pages/viewpage.action?pageId=281642865

Wipneus

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Re: Latest PIOMAS update (May)
« Reply #2337 on: May 06, 2018, 01:01:46 PM »
Last value (30 April) was 22.29 [103km3]. That is third place but the difference with 2011 is too close to be sure: 22.28 [103km3].

The official volume numbers are in and 2011 and 2018 are really close:
2011 120  22.282
(...)
2018 120  22.285

So its third lowest place.

Richard Rathbone

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Re: Latest PIOMAS update (May)
« Reply #2338 on: May 06, 2018, 01:51:57 PM »
2nd, 3rd, 4th are really close at end April, and 2012 joins that bunch at the end of May, so lose any further ground during May and 2018 will be back to 5th. The anomaly record doesn't look to be in danger this year, I'd have expected the May-June dive to be noticeable already if it was, but there's still plenty of time to end up anywhere from 1st to 8th at the minimum.

mitch

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Re: Latest PIOMAS update (May)
« Reply #2339 on: May 06, 2018, 06:55:47 PM »
A question about the Fram export numbers. Is the export east of Svalbard included in the Fram export, since it is not actually Fram Strait?  A lot of ice has been coming into the Barentz Sea between Nova Zemlya and Svalbard and then melting out. 

oren

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Re: Latest PIOMAS update (May)
« Reply #2340 on: May 06, 2018, 08:40:07 PM »
A question about the Fram export numbers. Is the export east of Svalbard included in the Fram export, since it is not actually Fram Strait?  A lot of ice has been coming into the Barentz Sea between Nova Zemlya and Svalbard and then melting out.
AFAIK, export east of Svalbard is not included in Fram export. More than that, export into the ice-killing zone north of Svalbard is also excluded from the Fram numbers. So in this age of melt inside the CAB and export in other directions, a better measure of export could have been across a more northerly line between the longitudes of Franz Josef Land and Greenland. The problem is that the Fram export line is almost always a one-way street, while other lines have movement back and forth across them, making any produced numbers suspect/ambiguous.

magnamentis

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Re: Latest PIOMAS update (May)
« Reply #2341 on: May 06, 2018, 09:04:58 PM »
2nd, 3rd, 4th are really close at end April, and 2012 joins that bunch at the end of May, so lose any further ground during May and 2018 will be back to 5th. The anomaly record doesn't look to be in danger this year, I'd have expected the May-June dive to be noticeable already if it was, but there's still plenty of time to end up anywhere from 1st to 8th at the minimum.

considering the development during the last few days which is not reflected in april numbers and considering the current temps and the forecast i think it's already now out of question that things will get worse and not better in may. i mean 6th of my + forecast makes it mid may and by then something extraordinary, something that is not in sight, must happen to turn this thing around.
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Re: Latest PIOMAS update (May)
« Reply #2342 on: May 07, 2018, 12:13:57 AM »
PIOMAS May 2018 is up on the ASIB. The final bit, as already mentioned by Steven, is the most interesting, I think:

Quote
One very interesting bit of extra information the UW's Polar Science Center has shared this month, is how both PIOMAS (model) and CryoSat (satellite observations) are in agreement with each other when it comes to sea ice volume distribution. In other words, where the ice is thicker and thinner, as compared to previous years. It turns out that both say that the ice is thicker on the Siberian side of the Arctic, but thinner in the thickest/oldest ice zone North of the Canadian Arctic Archipelago, when compared to the 2011-2017 period:



The fact that they are both in agreement, is also an indication that less snow has fallen on the ice than last winter, because this tends to make CryoSat deviate from PIOMAS. I'm saying it because this snow may have played a role in last year's lack of preconditioning during May and June, and thus the remainder of the melting season as well.

If weather conditions are detrimental to sea ice in the Siberian seas, sea ice volume may drop to low levels this melting season, as that's where more volume seems to be than on average in the last seven melting seasons. Right now those regions are seeing quite a bit of sunshine due to open skies, and temperatures are anomalously mild as well, but it's just the first week of May and so we can't say anything definite about it for now.

What we definitely can say, is that with the volume maximum behind us now, the melting season has officially started! I'm looking forward to see what the Arctic has in store for us this melting season.
Compare, compare, compare

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Re: Latest PIOMAS update (May)
« Reply #2343 on: May 07, 2018, 01:05:44 AM »
The maximum is very flat, melting hardly noticeable. 2011,2016 and 2018 volumes are nearly equal.

Could this be some bug? No other year has been anywhere near so flat?

Edit: They are not identical:
Code: [Select]
2018 106  22.376
2018 107  22.348
2018 108  22.334
2018 109  22.339
2018 110  22.330
2018 111  22.335
2018 112  22.334
2018 113  22.340
2018 114  22.327
2018 115  22.337
2018 116  22.336
2018 117  22.334
2018 118  22.326
2018 119  22.315
2018 120  22.285

2017 reached maximum day 118

2017 117  20.743
2017 118  20.745
2017 119  20.722

rare double peak in 2016
2016 109  22.571
2016 110  22.593
2016 111  22.589
2016 112  22.715
2016 113  22.581

2015 110  24.383
2015 111  24.394
2015 112  24.363

To have 5 peaks in 2018?

Hmm, I guess 2011 is somewhat similar

2011 103  22.646
2011 104  22.673
2011 105  22.661
2011 106  22.669
2011 107  22.672
2011 108  22.668
2011 109  22.677
2011 110  22.672
2011 111  22.649
« Last Edit: May 07, 2018, 01:22:58 AM by crandles »

DavidR

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Re: Latest PIOMAS update (May)
« Reply #2344 on: May 07, 2018, 09:12:29 AM »
The maximum is very flat, melting hardly noticeable. 2011,2016 and 2018 volumes are nearly equal.

Could this be some bug? No other year has been anywhere near so flat?

rare double peak in 2016

.
If I remember correctly there was a data outage in 2016 that saw a slump in volume from 7th to the 22nd. Volume dropped 300 km^3 over night on the 7th which is unusual even in the middle of the melt.  I think we can ignore 2016 in any calculations.
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Re: Latest PIOMAS update (May)
« Reply #2345 on: May 07, 2018, 03:32:08 PM »
If I remember correctly there was a data outage in 2016 that saw a slump in volume from 7th to the 22nd. Volume dropped 300 km^3 over night on the 7th which is unusual even in the middle of the melt.  I think we can ignore 2016 in any calculations.

Yes, something with the F17 DMSP sensor:
http://nsidc.org/arcticseaicenews/2016/04/sensor-on-f-17-experiencing-difficulties-sea-ice-time-series-temporarily-suspended/

NSIDC transferred to another satellite and after weeks of re-calibrations updated the faulty data. The faulty data still lives in the PIOMAS dataset it seems and can be seen in the attached animation.

BEWARE: this is from 2016! 

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Re: Latest PIOMAS update (May)
« Reply #2346 on: May 08, 2018, 10:23:19 PM »
hey wip, special request???

could you please add right-side vertical axis markings to the monthly average volume chart like you do to the others?

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Re: Latest PIOMAS update (May)
« Reply #2347 on: May 09, 2018, 01:32:22 PM »
hey wip, special request???

could you please add right-side vertical axis markings to the monthly average volume chart like you do to the others?

This one?

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Re: Latest PIOMAS update (May)
« Reply #2348 on: May 09, 2018, 09:24:39 PM »
I decided I wanted to look at the PIOMAS daily data as a ribbon from 1979 to now. Not sure if it shows any thing new.
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Re: Latest PIOMAS update (May)
« Reply #2349 on: May 09, 2018, 11:36:28 PM »
I decided I wanted to look at the PIOMAS daily data as a ribbon from 1979 to now. Not sure if it shows any thing new.
Great chart. It's not new I guess, but striking how the typical minimum up to 1992 was 15,000 which is now above the 50% line between min and max, maybe even close to 75%. In 2016/17, only ~4 months were spent above 15,000. So much ice volume is missing.