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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2000 on: December 20, 2020, 08:01:40 AM »
JAXA ARCTIC SEA ICE EXTENT:  11,672,440 KM2 as at 19-Dec-2020

- Extent gain on this day 110k, 67 k more than the average gain on this day (of the last 10 years) of 43k,
- Extent gain from minimum on this date is 8,118 k, which is 785 k, 11% more than the 10 year average of 7,333 k.

- Extent is at position #6 in the satellite record

- Extent is  58 k MORE than 2019,
- Extent is  312 k MORE than 2016,
- Extent is  68 k LESS than 2012
- Extent is  182 k LESS than 2007
- Extent is  18 k LESS than the 2010's Average
_____________________________________________
On average 74.4% of extent gains  from minimum to maximum done, and 82 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.20 million km2, 0.32 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
6 7 days of above average extent gains and lo and behold, extent that was 2nd lowest becomes 5th 6th lowest in the satellite record.

Now it looks very much about how high can it go (- until it changes again?)
_______________________________________________________________
N.B. Click on image to enlarge
"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

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Re: 2020 Sea ice area and extent data
« Reply #2001 on: December 20, 2020, 06:28:48 PM »
NSIDC Total EXTENT as at 19-Dec-2020 (5 day trailing average) 11,930,760 KM2         
         
Total EXTENT         
 11,930,760    km2      
-80,180    km2   <   2010's average.
-27,751    km2   <   2019
-511,831    km2   <   2000's average.
         
Total Change    118    k   gain
Peripheral Seas    73    k   gain
Central Seas___    45    k   gain
         
Peripheral Seas         
Okhotsk______    27    k   gain
Bering _______    9    k   gain
Hudson Bay___    9    k   gain
Baffin  Bay____    3    k   gain
St Lawrence___   -5    k   loss
Greenland____    6    k   gain
Barents ______    25    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    11    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    1    k   gain
Central Arctic_    3    k   gain
Laptev_______    -    k   loss
Kara_________    29    k   gain
         
NSIDC Sea ice EXTENT gain on this day 118 k, 73 k more than the 2010's average gain of 45k         
         
- 2020 EXTENT is at position #4 in the satellite record.         
- 2020 EXTENT is 80 k less than the 2010's average         
- 2020 EXTENT is 512 k less than the 2000's average         
- 2020 EXTENT is 291 k more than 2016         
- 2020 EXTENT is 28 k less than 2019          
- 2020 EXTENT is 12 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 19-Dec-2020 (5 day trailing average) 10,309,237 KM2         
         
Sea ice area gain on this day 118 k, 61 k more than the 2010's average gain of 57 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 292 k less than the 2010's average         
- 2020 Area is 683 k less than the 2000's average         
- 2020 Area is 482 k more than 2016         
- 2020 Area is 369 k less than 2019          
- 2020 Area is 248 k less than 2012   
___________________________________________
Sea ice extent in the 7 central seas of the High Arctic is at or nearly at 100% for all the seas apart from the Kara Sea.   
So after today I am abandoning the High Arctic Extent, and replacing it with the Sea Ice Area table or maybe a graph.

___________________________________________         
Note: Click an image for full-size         
"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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2002 on: December 21, 2020, 05:55:26 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 20th, 2020:
     11,813,109 km2, a century break increase of 140,669 km2.
     2020 is now 9th lowest on record.
     In the graph are today's 12 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 21, 2020, 06:50:03 AM by Juan C. García »
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2003 on: December 21, 2020, 10:30:05 AM »
JAXA ARCTIC SEA ICE EXTENT:  11,813,109 KM2 as at 20-Dec-2020

- Extent gain on this day 141k, 102 k more than the average gain on this day (of the last 10 years) of 39k,
- Extent gain from minimum on this date is 8,258 k, which is 893 k, 12% more than the 10 year average of 7,365 k.

- Extent is at position #9 in the satellite record

- Extent is  132 k MORE than 2019,
- Extent is  366 k MORE than 2016,
- Extent is  50 k MORE than 2012
- Extent is  142 k LESS than 2007
- Extent is  84 k LESS than the 2010's Average
_____________________________________________
On average 74.7% of extent gains  from minimum to maximum done, and 81 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.30 million km2, 0.43 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
6 7 8 days of above average extent gains and lo and behold, extent that was 2nd lowest becomes 5th 6th 9th lowest in the satellite record.

Now it is about how high can it go (- until it changes again?)
_______________________________________________________________
N.B. Click on image to enlarge
"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

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Re: 2020 Sea ice area and extent data
« Reply #2004 on: December 21, 2020, 03:44:33 PM »
Today this post  is mainly sea ice area data

NSIDC Total AREA as at 20-Dec-2020 (5 day trailing average) 10,433,738 KM2         
         
Total Area         
 10,433,738    km2      
-224,955    km2   <   2010's average.
-309,631    km2   <   2019
-621,256    km2   <   2000's average.
         
Total Change    125    k   gain
Peripheral Seas    56    k   gain
Central Seas___    68    k   gain
         
Peripheral Seas         
Okhotsk______    12    k   gain
Bering _______    6    k   gain
Hudson Bay___    13    k   gain
Baffin  Bay____    12    k   gain
St Lawrence___   -2    k   loss
Greenland____    2    k   gain
Barents ______    13    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    21    k   gain
Beaufort_____    2    k   gain
CAA_________    2    k   gain
East Siberian__    6    k   gain
Central Arctic_    12    k   gain
Laptev_______   -1    k   loss
Kara_________    26    k   gain
         
Sea ice area gain on this day 125 k, 68 k more than the 2010's average gain of 57 k         
         
- 2020 area is at position #3 in the satellite record.         
- 2020 Area is 225 k less than the 2010's average         
- 2020 Area is 621 k less than the 2000's average         
- 2020 Area is 530 k more than 2016         
- 2020 Area is 310 k less than 2019          
- 2020 Area is 202 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 20-Dec-2020 (5 day trailing average) 12,035,168 KM2         
         
NSIDC Sea ice EXTENT gain on this day 105 k, 63 k more than the 2010's average gain of 42k         
         
- 2020 EXTENT is at position #7 in the satellite record.         
- 2020 EXTENT is 17 k less than the 2010's average         
- 2020 EXTENT is 464 k less than the 2000's average         
- 2020 EXTENT is 308 k more than 2016         
- 2020 EXTENT is 40 k more than 2019          
- 2020 EXTENT is 19 k more than 2012         
___________________________________________         
Note: Click an image for full-size         
"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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2005 on: December 22, 2020, 04:42:24 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 21st, 2020:
     The ADS-NIPR server is not responding.
     I appreciate if someone else posts the data.

Thank you.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

kassy

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Re: 2020 Sea ice area and extent data
« Reply #2006 on: December 22, 2020, 11:45:31 AM »
It´s still down.
Þetta minnismerki er til vitnis um að við vitum hvað er að gerast og hvað þarf að gera. Aðeins þú veist hvort við gerðum eitthvað.

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2007 on: December 22, 2020, 03:15:51 PM »
Today this post  is mainly sea ice area data

NSIDC Total AREA as at 21-Dec-2020 (5 day trailing average) 10,565,705 KM2         
         
Total Area         
 10,565,705    km2      
-151,427    km2   <   2010's average.
-241,047    km2   <   2019
-552,339    km2   <   2000's average.
         
Total Change    132    k   gain
Peripheral Seas    63    k   gain
Central Seas___    69    k   gain
         
Peripheral Seas         
Okhotsk______    15    k   gain
Bering _______    6    k   gain
Hudson Bay___    14    k   gain
Baffin  Bay____    15    k   gain
St Lawrence___   -1    k   loss
Greenland____   -1    k   loss
Barents ______    14    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    20    k   gain
Beaufort_____    2    k   gain
CAA_________    3    k   gain
East Siberian__    11    k   gain
Central Arctic_    13    k   gain
Laptev_______   -2    k   loss
Kara_________    23    k   gain
         
Sea ice area gain on this day 132 k, 74 k more than the 2010's average gain of 58 k         
         
- 2020 area is at position #4 in the satellite record.         
- 2020 Area is 151 k less than the 2010's average         
- 2020 Area is 552 k less than the 2000's average         
- 2020 Area is 621 k more than 2016         
- 2020 Area is 241 k less than 2019          
- 2020 Area is 148 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 21-Dec-2020 (5 day trailing average) 12,118,583 KM2         
         
NSIDC Sea ice EXTENT gain on this day 84 k, 42 k more than the 2010's average gain of 42k         
         
- 2020 EXTENT is at position #7 in the satellite record.         
- 2020 EXTENT is 24 k more than the 2010's average         
- 2020 EXTENT is 439 k less than the 2000's average         
- 2020 EXTENT is 367 k more than 2016         
- 2020 EXTENT is 82 k more than 2019          
- 2020 EXTENT is 21 k more than 2012         
___________________________________________         
Note: Click an image for full-size         
"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

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Re: 2020 Sea ice area and extent data
« Reply #2008 on: December 22, 2020, 03:30:44 PM »
Graphs from NSIDC Data

I attach summary extent and area graphs for the High Arctic and the Peripheral Seas.

They show that sea ice extent and area recovery, though late again, is pretty much universal.
"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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2009 on: December 23, 2020, 05:35:46 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 21st, 2020:
     The ADS-NIPR server is not responding.
     I appreciate if someone else posts the data.

Thank you.

Source: https://ads.nipr.ac.jp/vishop/#/extent.

For 2nd consecutive day, the ADS-NIPR server is not responding.
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

Stephan

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Re: 2020 Sea ice area and extent data
« Reply #2010 on: December 23, 2020, 08:11:23 AM »
Still not working...  >:(
It is too late just to be concerned about Climate Change

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2011 on: December 23, 2020, 03:32:51 PM »
Today again this post  is mainly sea ice area data

NSIDC Total AREA as at 22-Dec-2020 (5 day trailing average) 10,682,194 KM2
         
         
Total Area         
 10,682,194    km2      
-89,579    km2   <   2010's average.
-200,857    km2   <   2019
-497,849    km2   <   2000's average.
         
Total Change    117    k   gain
Peripheral Seas    57    k   gain
Central Seas___    59    k   gain
         
Peripheral Seas         
Okhotsk______    16    k   gain
Bering _______    8    k   gain
Hudson Bay___    9    k   gain
Baffin  Bay____    12    k   gain
St Lawrence___    4    k   gain
Greenland____    2    k   gain
Barents ______    7    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    19    k   gain
Beaufort_____    1    k   gain
CAA_________    3    k   gain
East Siberian__    13    k   gain
Central Arctic_    3    k   gain
Laptev_______   -3    k   loss
Kara_________    22    k   gain
         
Sea ice area gain on this day 117 k, 62 k more than the 2010's average gain of 55 k         
         
- 2020 area is at position #4 in the satellite record.         
- 2020 Area is 90 k less than the 2010's average         
- 2020 Area is 498 k less than the 2000's average         
- 2020 Area is 714 k more than 2016         
- 2020 Area is 201 k less than 2019          
- 2020 Area is 68 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 22-Dec-2020 (5 day trailing average) 12,219,558 KM2         
         
NSIDC Sea ice EXTENT gain on this day 101 k, 51 k more than the 2010's average gain of 50k         
         
- 2020 EXTENT is at position #7 in the satellite record.         
- 2020 EXTENT is 75 k more than the 2010's average         
- 2020 EXTENT is 394 k less than the 2000's average         
- 2020 EXTENT is 435 k more than 2016         
- 2020 EXTENT is 120 k more than 2019          
- 2020 EXTENT is 65 k more than 2012         
___________________________________________         
Note: Click an image for full-size         
"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)

mabarnes

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Re: 2020 Sea ice area and extent data
« Reply #2012 on: December 24, 2020, 05:07:37 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 21st, 2020:
     The ADS-NIPR server is not responding.
     I appreciate if someone else posts the data.

Thank you.

It's back, sorry for the lack of colors ...

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2013 on: December 24, 2020, 05:09:12 AM »
It's back, sorry for the lack of colors ...
Thank you, mabarnes.

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 21th, 2020:
     11,849,066 km2, an increase of 35,957 km2.
December 22th, 2020:
     11,908,651 km2, an increase of 59,585 km2.

December 23th, 2020:
     11,959,910 km2, an increase of 51,259 km2.
     2020 is now 8th lowest on record.
     In the graph are today's 16 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 25, 2020, 04:45:29 AM by Juan C. García »
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2014 on: December 24, 2020, 10:08:36 AM »
JAXA ARCTIC SEA ICE EXTENT:  11,959,910 KM2 as at 23-Dec-2020

- Extent gain on this day 51k, 1 k more than the average gain on this day (of the last 10 years) of 50k,
- Extent gain from minimum on this date is 8,405 k, which is 914 k, 12% more than the 10 year average of 7,491 k.

- Extent is at position #8 in the satellite record

- Extent is  26 k LESS than 2019,
- Extent is  561 k MORE than 2016,
- Extent is  122 k MORE than 2012
- Extent is  352 k LESS than 2007
- Extent is  86 k LESS than the 2010's Average
_____________________________________________
On average 76.1% of extent gains  from minimum to maximum done, and 78 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.31 million km2, 0.43 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
While the JAXA website was down, a small relief from relentlessly very high daily sea ice extent gains.
Will it continue?

_______________________________________________________________
N.B. Click on image to enlarge
"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

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Re: 2020 Sea ice area and extent data
« Reply #2015 on: December 24, 2020, 05:29:52 PM »
Area data on this day

NSIDC Total AREA as at 23-Dec-2020 (5 day trailing average) 10,766,912 KM2
         
         
Total Area         
 10,766,912    km2      
-51,345    km2   <   2010's average.
-211,873    km2   <   2019
-469,327    km2   <   2000's average.
         
Total Change    85    k   gain
Peripheral Seas    41    k   gain
Central Seas___    44    k   gain
         
Peripheral Seas         
Okhotsk______    14    k   gain
Bering _______    5    k   gain
Hudson Bay___    13    k   gain
Baffin  Bay____    4    k   gain
St Lawrence___    1    k   gain
Greenland____    1    k   gain
Barents ______    3    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    15    k   gain
Beaufort_____   -1    k   loss
CAA_________    2    k   gain
East Siberian__    14    k   gain
Central Arctic_   -6    k   loss
Laptev_______   -1    k   loss
Kara_________    22    k   gain
         
Sea ice area gain on this day 85 k, 39 k more than the 2010's average gain of 46 k         
         
- 2020 area is at position #5 in the satellite record.         
- 2020 Area is 51 k less than the 2010's average         
- 2020 Area is 469 k less than the 2000's average         
- 2020 Area is 796 k more than 2016         
- 2020 Area is 212 k less than 2019          
- 2020 Area is 34 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 23-Dec-2020 (5 day trailing average) 12,296,596 KM2         
         
NSIDC Sea ice EXTENT gain on this day 77 k, 34 k more than the 2010's average gain of 43k         
         
- 2020 EXTENT is at position #9 in the satellite record.         
- 2020 EXTENT is 110 k more than the 2010's average         
- 2020 EXTENT is 369 k less than the 2000's average         
- 2020 EXTENT is 517 k more than 2016         
- 2020 EXTENT is 106 k more than 2019          
- 2020 EXTENT is 136 k more than 2012         
___________________________________________         
Note: Click an image for full-size         
"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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2016 on: December 25, 2020, 04:44:22 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 24th, 2020:
     11,980,901 km2, an increase of 20,991 km2.
     2020 is 8th lowest on record.
     In the graph are today's 16 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.

Happy holidays!!!  ;)
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2017 on: December 25, 2020, 10:47:27 AM »
JAXA ARCTIC SEA ICE EXTENT:  11,980,901 KM2 as at 24-Dec-2020

- Extent gain on this day 21k, 20 k less than the average gain on this day (of the last 10 years) of 41k,
- Extent gain from minimum on this date is 8,426 k, which is 898 k, 12% more than the 10 year average of 7,528 k.

- Extent is at position #8 in the satellite record

- Extent is  83 k LESS than 2019,
- Extent is  579 k MORE than 2016,
- Extent is  74 k MORE than 2012
- Extent is  388 k LESS than 2007
- Extent is  66 k LESS than the 2010's Average
_____________________________________________
On average 76.6% of extent gains  from minimum to maximum done, and 77 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.29 million km2, 0.41 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge

ps: Merry whatever you want to call this day.
"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

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Re: 2020 Sea ice area and extent data
« Reply #2018 on: December 25, 2020, 03:55:39 PM »
And once more mainly area data

NSIDC Total AREA as at 24-Dec-2020 (5 day trailing average) 10,843,696 KM2
         
         
Total Area         
 10,843,696    km2      
-16,719    km2   <   2010's average.
-225,157    km2   <   2019
-452,077    km2   <   2000's average.
         
Total Change    77    k   gain
Peripheral Seas    44    k   gain
Central Seas___    33    k   gain
         
Peripheral Seas         
Okhotsk______    14    k   gain
Bering _______    3    k   gain
Hudson Bay___    28    k   gain
Baffin  Bay____    3    k   gain
St Lawrence___    2    k   gain
Greenland____   -3    k   loss
Barents ______   -4    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    14    k   gain
Beaufort_____   -2    k   loss
CAA_________    0    k   gain
East Siberian__    15    k   gain
Central Arctic_   -16    k   loss
Laptev_______    0    k   gain
Kara_________    20    k   gain
         
Sea ice area gain on this day 77 k, 35 k more than the 2010's average gain of 42 k         
         
- 2020 area is at position #5 in the satellite record.         
- 2020 Area is 17 k less than the 2010's average         
- 2020 Area is 452 k less than the 2000's average         
- 2020 Area is 868 k more than 2016         
- 2020 Area is 225 k less than 2019          
- 2020 Area is 113 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 24-Dec-2020 (5 day trailing average) 12,346,171 KM2         
         
NSIDC Sea ice EXTENT gain on this day 50 k, 1 k more than the 2010's average gain of 49k         
         
- 2020 EXTENT is at position #9 in the satellite record.         
- 2020 EXTENT is 110 k more than the 2010's average         
- 2020 EXTENT is 376 k less than the 2000's average         
- 2020 EXTENT is 570 k more than 2016         
- 2020 EXTENT is 69 k more than 2019          
- 2020 EXTENT is 122 k more than 2012         
___________________________________________         
Note: Click an image for full-size      
"Para a Causa do Povo a Luta Continua!"
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"Damn, I wanted to see what happened next" (Epitaph)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2019 on: December 26, 2020, 05:07:55 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 25th, 2020:
     12,033,714 km2, an increase of 52,813 km2.
     2020 is now 6th lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2020 on: December 26, 2020, 12:47:24 PM »
JAXA ARCTIC SEA ICE EXTENT:  12,033,714 KM2 as at 25-Dec-2020

- Extent gain on this day 53k, 0 k less than the average gain on this day (of the last 10 years) of 53k,
- Extent gain from minimum on this date is 8,479 k, which is 899 k, 12% more than the 10 year average of 7,580 k.

- Extent is at position #6 in the satellite record

- Extent is  106 k LESS than 2019,
- Extent is  527 k MORE than 2016,
- Extent is  5 k LESS than 2012
- Extent is  319 k LESS than 2007
- Extent is  66 k LESS than the 2010's Average
_____________________________________________
On average 77.1% of extent gains  from minimum to maximum done, and 76 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.29 million km2, 0.41 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
3 days of slighly below average extent gain moves total extent from 9th lowest to 6th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge
"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

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Re: 2020 Sea ice area and extent data
« Reply #2021 on: December 26, 2020, 04:10:25 PM »
NSIDC Total AREA as at 25-Dec-2020 (5 day trailing average) 10,902,092 KM2         
         
Total Area         
 10,902,092    km2      
 3,089    km2   >   2010's average.
-251,920    km2   <   2019
-448,918    km2   <   2000's average.
         
Total Change    58    k   gain
Peripheral Seas    38    k   gain
Central Seas___    20    k   gain
         
Peripheral Seas         
Okhotsk______    18    k   gain
Bering _______    4    k   gain
Hudson Bay___    24    k   gain
Baffin  Bay____    5    k   gain
St Lawrence___    2    k   gain
Greenland____   -8    k   loss
Barents ______   -6    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    14    k   gain
Beaufort_____   -1    k   loss
CAA_________    1    k   gain
East Siberian__    15    k   gain
Central Arctic_   -33    k   loss
Laptev_______    2    k   gain
Kara_________    21    k   gain
         
Sea ice area gain on this day 58 k, 19 k more than the 2010's average gain of 39 k         
         
- 2020 area is at position #5 in the satellite record.         
- 2020 Area is 3 k more than the 2010's average         
- 2020 Area is 449 k less than the 2000's average         
- 2020 Area is 900 k more than 2016         
- 2020 Area is 252 k less than 2019          
- 2020 Area is 183 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 25-Dec-2020 (5 day trailing average) 12,389,817 KM2         
         
NSIDC Sea ice EXTENT gain on this day 44 k, 8 k less than the 2010's average gain of 52k         
         
- 2020 EXTENT is at position #8 in the satellite record.         
- 2020 EXTENT is 103 k more than the 2010's average         
- 2020 EXTENT is 386 k less than the 2000's average         
- 2020 EXTENT is 615 k more than 2016         
- 2020 EXTENT is 39 k more than 2019          
- 2020 EXTENT is 99 k more than 2012         
___________________________________________         
Note: Click an image for full-size         
"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

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Re: 2020 Sea ice area and extent data
« Reply #2022 on: December 26, 2020, 04:19:18 PM »
Atlantic Front - Area Graphs from NSIDC data

Whilethe Kara fills up with ice at a rate of knots, the Barents, Greenland and Central Arctic seas show area losses in the last few days.

Just a blip in the weather?
"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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2023 on: December 27, 2020, 04:42:07 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 26th, 2020:
     12,038,221 km2, a small increase of 4,507 km2.
     2020 is 6th lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2024 on: December 27, 2020, 01:22:46 PM »
JAXA ARCTIC SEA ICE EXTENT:  12,038,221 KM2 as at 26-Dec-2020

- Extent gain on this day 5k, 48 k less than the average gain on this day (of the last 10 years) of 53k,
- Extent gain from minimum on this date is 8,483 k, which is 849 k, 11% more than the 10 year average of 7,635 k.

- Extent is at position #6 in the satellite record

- Extent is  176 k LESS than 2019,
- Extent is  417 k MORE than 2016,
- Extent is  90 k LESS than 2012
- Extent is  296 k LESS than 2007
- Extent is  18 k LESS than the 2010's Average
_____________________________________________
On average 77.6% of extent gains  from minimum to maximum done, and 75 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.24 million km2, 0.36 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"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

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Re: 2020 Sea ice area and extent data
« Reply #2025 on: December 27, 2020, 03:38:51 PM »
NSIDC Total AREA as at 26-Dec-2020 (5 day trailing average) 10,943,322 KM2         
         
Total Area         
 10,943,322    km2      
 7,228    km2   >   2010's average.
-297,521    km2   <   2019
-457,574    km2   <   2000's average.
         
Total Change    41    k   gain
Peripheral Seas    27    k   gain
Central Seas___    15    k   gain
         
Peripheral Seas         
Okhotsk______    20    k   gain
Bering _______    5    k   gain
Hudson Bay___    16    k   gain
Baffin  Bay____    6    k   gain
St Lawrence___    2    k   gain
Greenland____   -13    k   loss
Barents ______   -10    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    11    k   gain
Beaufort_____   -0    k   loss
CAA_________    2    k   gain
East Siberian__    15    k   gain
Central Arctic_   -39    k   loss
Laptev_______    4    k   gain
Kara_________    22    k   gain
         
Sea ice area gain on this day 41 k, 4 k more than the 2010's average gain of 37 k         
         
- 2020 area is at position #6 in the satellite record.         
- 2020 Area is 7 k more than the 2010's average         
- 2020 Area is 458 k less than the 2000's average         
- 2020 Area is 875 k more than 2016         
- 2020 Area is 298 k less than 2019          
- 2020 Area is 224 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 26-Dec-2020 (5 day trailing average) 12,429,838 KM2         
         
NSIDC Sea ice EXTENT gain on this day 40 k, 9 k less than the 2010's average gain of 49k         
         
- 2020 EXTENT is at position #7 in the satellite record.         
- 2020 EXTENT is 94 k more than the 2010's average         
- 2020 EXTENT is 399 k less than the 2000's average         
- 2020 EXTENT is 615 k more than 2016         
- 2020 EXTENT is 1 k more than 2019          
- 2020 EXTENT is 74 k more than 2012         
___________________________________________         
Note: Click an image for full-size         
"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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2026 on: December 28, 2020, 04:49:29 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 27th, 2020:
     12,015,011 km2, a drop of -23,210 km2.
     2020 is now 5th lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 28, 2020, 05:25:00 AM by Juan C. García »
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2027 on: December 28, 2020, 12:08:05 PM »
JAXA ARCTIC SEA ICE EXTENT:  12,015,011 KM2 as at 27-Dec-2020

- Extent loss on this day 23k, 78 k less than the average gain on this day (of the last 10 years) of 55k,
- Extent gain from minimum on this date is 8,460 k, which is 768 k, 10% more than the 10 year average of 7,693 k.

- Extent is at position #5 in the satellite record

- Extent is  245 k LESS than 2019,
- Extent is  239 k MORE than 2016,
- Extent is  192 k LESS than 2012
- Extent is  355 k LESS than 2007
- Extent is  60 k LESS than the 2010's Average
_____________________________________________
On average 78.2% of extent gains  from minimum to maximum done, and 74 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.16 million km2, 0.28 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
An extent loss on a day is not that unusual
_______________________________________________________________
N.B. Click on image to enlarge
"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

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Re: 2020 Sea ice area and extent data
« Reply #2028 on: December 28, 2020, 03:44:37 PM »
NSIDC Total AREA as at 27-Dec-2020 (5 day trailing average) 10,961,466 KM2         
         
Total Area         
 10,961,466    km2      
-17,461    km2   <   2010's average.
-344,057    km2   <   2019
-481,725    km2   <   2000's average.
         
Total Change    18    k   gain
Peripheral Seas    9    k   gain
Central Seas___    9    k   gain
         
Peripheral Seas         
Okhotsk______    20    k   gain
Bering _______    2    k   gain
Hudson Bay___    4    k   gain
Baffin  Bay____    8    k   gain
St Lawrence___   -3    k   loss
Greenland____   -16    k   loss
Barents ______   -5    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    8    k   gain
Beaufort_____    0    k   gain
CAA_________    0    k   gain
East Siberian__    11    k   gain
Central Arctic_   -34    k   loss
Laptev_______    2    k   gain
Kara_________    21    k   gain
         
Sea ice area gain on this day 18 k, 25 k less than the 2010's average gain of 43 k         
         
- 2020 area is at position #6 in the satellite record.         
- 2020 Area is 17 k less than the 2010's average         
- 2020 Area is 482 k less than the 2000's average         
- 2020 Area is 800 k more than 2016         
- 2020 Area is 344 k less than 2019          
- 2020 Area is 199 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 27-Dec-2020 (5 day trailing average) 12,442,533 KM2         
         
NSIDC Sea ice EXTENT gain on this day 13 k, 36 k less than the 2010's average gain of 49k         
         
- 2020 EXTENT is at position #6 in the satellite record.         
- 2020 EXTENT is 57 k more than the 2010's average         
- 2020 EXTENT is 436 k less than the 2000's average         
- 2020 EXTENT is 556 k more than 2016         
- 2020 EXTENT is 64 k less than 2019          
- 2020 EXTENT is 13 k more than 2012         
___________________________________________         
Note: Click an image for full-size         
"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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2029 on: December 29, 2020, 05:31:58 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 28th, 2020:
     12,027,233 km2, an increase of 12,222 km2.
     2020 is 5th lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 29, 2020, 05:43:07 AM by Juan C. García »
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2030 on: December 29, 2020, 10:36:30 AM »
JAXA ARCTIC SEA ICE EXTENT:  12,027,233 KM2 as at 28-Dec-2020

- Extent gain on this day 12k, 39 k less than the average gain on this day (of the last 10 years) of 51k,
- Extent gain from minimum on this date is 8,472 k, which is 723 k, 9% more than the 10 year average of 7,749 k.

- Extent is at position #5 in the satellite record

- Extent is  233 k LESS than 2019,
- Extent is  149 k MORE than 2016,
- Extent is  271 k LESS than 2012
- Extent is  425 k LESS than 2007
- Extent is  99 k LESS than the 2010's Average
_____________________________________________
On average 78.7% of extent gains  from minimum to maximum done, and 73 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.12 million km2, 0.24 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"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

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Re: 2020 Sea ice area and extent data
« Reply #2031 on: December 29, 2020, 02:51:45 PM »
NSIDC Total AREA as at 28-Dec-2020 (5 day trailing average) 10,978,908 KM2         
         
Total Area         
 10,978,908    km2      
-51,807    km2   <   2010's average.
-364,225    km2   <   2019
-502,735    km2   <   2000's average.
         
Total Change    17    k   gain
Peripheral Seas    3    k   gain
Central Seas___    15    k   gain
         
Peripheral Seas         
Okhotsk______    20    k   gain
Bering _______    0    k   gain
Hudson Bay___   -5    k   loss
Baffin  Bay____    2    k   gain
St Lawrence___   -1    k   loss
Greenland____   -15    k   loss
Barents ______    1    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    10    k   gain
Beaufort_____    3    k   gain
CAA_________   -1    k   loss
East Siberian__    8    k   gain
Central Arctic_   -24    k   loss
Laptev_______    0    k   gain
Kara_________    18    k   gain
         
Sea ice area gain on this day 17 k, 35 k less than the 2010's average gain of 52 k         
         
- 2020 area is at position #6 in the satellite record.         
- 2020 Area is 52 k less than the 2010's average         
- 2020 Area is 503 k less than the 2000's average         
- 2020 Area is 699 k more than 2016         
- 2020 Area is 364 k less than 2019          
- 2020 Area is 114 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 28-Dec-2020 (5 day trailing average) 12,453,687 KM2         
         
NSIDC Sea ice EXTENT gain on this day 11 k, 48 k less than the 2010's average gain of 59k         
         
- 2020 EXTENT is at position #5 in the satellite record.         
- 2020 EXTENT is 10 k more than the 2010's average         
- 2020 EXTENT is 473 k less than the 2000's average         
- 2020 EXTENT is 430 k more than 2016         
- 2020 EXTENT is 106 k less than 2019          
- 2020 EXTENT is 92 k less than 2012         
___________________________________________         
Note: Click an image for full-size         
"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

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Re: 2020 Sea ice area and extent data
« Reply #2032 on: December 29, 2020, 02:59:46 PM »
Graphs from NSIDC Data - The Atlantic Front.

While the Kara Sea extent and area rush to completion, the Barents, Greenland and central Arctic do not.

Indeed, the Central Arctic has lost 150k sea ice area over the last 5 days. This is an impressive push back of the sea ice back North of 80 along a realtively short front between NE Greenland and Svalbard.

"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)

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Re: 2020 Sea ice area and extent data
« Reply #2033 on: December 30, 2020, 06:45:05 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 29th, 2020:
     12,073,571 km2, an increase of 46,338 km2.
     2020 is 5th lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 30, 2020, 06:53:38 AM by Juan C. García »
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2034 on: December 30, 2020, 08:48:51 AM »
JAXA ARCTIC SEA ICE EXTENT:  12,073,571 KM2 as at 29-Dec-2020

- Extent gain on this day 46k, 25 k less than the average gain on this day (of the last 10 years) of 71k,
- Extent gain from minimum on this date is 8,519 k, which is 695 k, 9% more than the 10 year average of 7,823 k.

- Extent is at position #5 in the satellite record

- Extent is  176 k LESS than 2019,
- Extent is  47 k MORE than 2016,
- Extent is  329 k LESS than 2012
- Extent is  445 k LESS than 2007
- Extent is  124 k LESS than the 2010's Average
_____________________________________________
On average 79.5% of extent gains  from minimum to maximum done, and 72 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.10 million km2, 0.22 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"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)

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Re: 2020 Sea ice area and extent data
« Reply #2035 on: December 30, 2020, 01:10:07 PM »
Is this correct?

Extent is at position #5 in the satellite record

I'm trying to see how that is correct?  :-*
Randy Fitton

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Re: 2020 Sea ice area and extent data
« Reply #2036 on: December 30, 2020, 02:38:11 PM »
Is this correct?

Extent is at position #5 in the satellite record

I'm trying to see how that is correct?  :-*
Look at the table - last image above.

Not all years are shown on the extent graph.
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Re: 2020 Sea ice area and extent data
« Reply #2037 on: December 30, 2020, 02:44:04 PM »
NSIDC Total AREA as at 29-Dec-2020 (5 day trailing average) 10,998,759 KM2         
         
Total Area         
 10,998,759    km2      
-85,528    km2   <   2010's average.
-372,284    km2   <   2019
-520,792    km2   <   2000's average.
         
Total Change    20    k   gain
Peripheral Seas    1    k   gain
Central Seas___    18    k   gain
         
Peripheral Seas         
Okhotsk______    19    k   gain
Bering _______   -0    k   loss
Hudson Bay___   -8    k   loss
Baffin  Bay____   -3    k   loss
St Lawrence___    1    k   gain
Greenland____   -10    k   loss
Barents ______    3    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    8    k   gain
Beaufort_____    3    k   gain
CAA_________   -0    k   loss
East Siberian__    7    k   gain
Central Arctic_   -14    k   loss
Laptev_______    1    k   gain
Kara_________    15    k   gain
         
Sea ice area gain on this day 20 k, 34 k less than the 2010's average gain of 54 k         
         
- 2020 area is at position #6 in the satellite record.         
- 2020 Area is 86 k less than the 2010's average         
- 2020 Area is 521 k less than the 2000's average         
- 2020 Area is 591 k more than 2016         
- 2020 Area is 372 k less than 2019          
- 2020 Area is 47 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 29-Dec-2020 (5 day trailing average) 12,475,506 KM2         
         
NSIDC Sea ice EXTENT gain on this day 22 k, 35 k less than the 2010's average gain of 57k         
         
- 2020 EXTENT is at position #5 in the satellite record.         
- 2020 EXTENT is 26 k less than the 2010's average         
- 2020 EXTENT is 494 k less than the 2000's average         
- 2020 EXTENT is 310 k more than 2016         
- 2020 EXTENT is 134 k less than 2019          
- 2020 EXTENT is 138 k less than 2012
________________________________________
Only two of the central seas still of interest
- Kara Sea, freeze rushing to com,pletion,
- Central Arctic still losing extent and area from NE Greenland to North of Svalbard   .

Not long for attnetion to switch almost entirely to theperipheral seas for extent and area - (but PIOMAS volume becomes even more relevant for all seas).   
___________________________________________         
Note: Click an image for full-size         
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2038 on: December 30, 2020, 02:48:04 PM »
Graphs from NSIDC data

Note that now area of the High Arctic Seas is above the 2010's average, while area of the Peripheral Seas is below the 2010's average.
"Para a Causa do Povo a Luta Continua!"
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"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2039 on: December 30, 2020, 04:15:12 PM »
NSIDC Data Query

Not a lot of people know that the NSIDC sea ice extent total is greater than the sum of extents of the 14 seas.....

I wrote to NSIDC this...
______________________________________
Every day I download the 5-day Arctic Sea Ice trailing averages for the 14 regions from N_Sea_Ice_Index_Regional_Daily_Data_G02135_v3.0.xlsx and post an analysis on the Arctic Sea Ice Forum. That analysis includes adding up the total sea ice extent of the 14 seas.

But that total does not agree with the 5-day trailing average extent from
file Sea_Ice_Index_Daily_Extent_G02135_v3.0.xlsx

The value from this file is always about 100k km2 greater than the figure
from adding up the 14 individual Arctic regions. See table below

Is this just because its how the algorithms work?
Which figure for the total should I use ?

              Total of
              the 14 seas
              5-day extent      NSIDC 5 day extent   Difference
21-Dec     12.118                    12.216                   0.098
22-Dec     12.220                    12.326                   0.106
23-Dec     12.297                    12.401                   0.104
24-Dec     12.346                    12.451                   0.105
25-Dec     12.390                    12.494                   0.104
__________________________________________

And got a reply from the man himself (Walter Meier)
____________________________________________
"The total is the entire polar stereo grid. If one looks at the regions, there are areas of the grid outside of these regions. Most, if not all of such ice is false ice - i.e., either weather effects or land-spillover error. However, there can be some legitimate ice - mostly this would be in winter in places like the Bohai Sea off the coast of China or in the Chesapeake Bay (though this is brackish water, so one could argue if that is “true” sea ice). The area of such extraneous ice is, as noted in the data, quite small: ~100,000 sq km."
_______________________________________
"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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #2040 on: December 31, 2020, 05:22:23 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 30th, 2020:
     12,121,262 km2, an increase of 47,691 km2.
     2020 is now 4th lowest on record.
     In the graph are today's 16 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: January 01, 2021, 05:46:11 AM by Juan C. García »
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

miki

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Re: 2020 Sea ice area and extent data
« Reply #2041 on: December 31, 2020, 05:59:00 AM »
Just a quick note, to deeply thank Juan and Gerontocrat for your daily updates.
I'm sure there is a lot of us coming here every day to check. Truly thanks.

A serene and healthy New Year to everybody!

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2042 on: December 31, 2020, 10:47:34 AM »
JAXA ARCTIC SEA ICE EXTENT:  12,121,262 KM2 as at 30-Dec-2020

- Extent gain on this day 48k, 5 k less than the average gain on this day (of the last 10 years) of 53k,
- Extent gain from minimum on this date is 8,566 k, which is 692 k, 9% more than the 10 year average of 7,875 k.

- Extent is at position #4 in the satellite record

- Extent is  166 k LESS than 2019,
- Extent is  36 k MORE than 2016,
- Extent is  351 k LESS than 2012
- Extent is  479 k LESS than 2007
- Extent is  129 k LESS than the 2010's Average
_____________________________________________
On average 80.0% of extent gains  from minimum to maximum done, and 71 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.09 million km2, 0.21 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"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

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Re: 2020 Sea ice area and extent data
« Reply #2043 on: December 31, 2020, 02:24:26 PM »
NSIDC Total AREA as at 30-Dec-2020 (5 day trailing average) 11,013,857 KM2         
         
Total Area         
 11,013,857    km2      
-123,932    km2   <   2010's average.
-379,801    km2   <   2019
-551,602    km2   <   2000's average.
         
Total Change    15    k   gain
Peripheral Seas   -5    k   loss
Central Seas___    20    k   gain
         
Peripheral Seas         
Okhotsk______    13    k   gain
Bering _______   -3    k   loss
Hudson Bay___   -9    k   loss
Baffin  Bay____   -5    k   loss
St Lawrence___    0    k   gain
Greenland____   -4    k   loss
Barents ______    2    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    2    k   gain
Beaufort_____    2    k   gain
CAA_________   -0    k   loss
East Siberian__    5    k   gain
Central Arctic_    1    k   gain
Laptev_______   -0    k   loss
Kara_________    11    k   gain
         
Sea ice area gain on this day 15 k, 39 k less than the 2010's average gain of 54 k         
         
- 2020 area is at position #4 in the satellite record.         
- 2020 Area is 124 k less than the 2010's average         
- 2020 Area is 552 k less than the 2000's average         
- 2020 Area is 502 k more than 2016         
- 2020 Area is 380 k less than 2019          
- 2020 Area is 47 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 30-Dec-2020 (5 day trailing average) 12,494,343 KM2         
         
NSIDC Sea ice EXTENT gain on this day 19 k, 36 k less than the 2010's average gain of 55k         
         
- 2020 EXTENT is at position #5 in the satellite record.         
- 2020 EXTENT is 62 k less than the 2010's average         
- 2020 EXTENT is 522 k less than the 2000's average         
- 2020 EXTENT is 192 k more than 2016         
- 2020 EXTENT is 172 k less than 2019          
- 2020 EXTENT is 186 k less than 2012         
___________________________________________         
Note: Click an image for full-size         
"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)

Davidsf

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Re: 2020 Sea ice area and extent data
« Reply #2044 on: December 31, 2020, 04:50:57 PM »
Echoing the thanks above for Juan and Gero

Shared Humanity

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Re: 2020 Sea ice area and extent data
« Reply #2045 on: December 31, 2020, 05:17:57 PM »
Just a quick note, to deeply thank Juan and Gerontocrat for your daily updates.
I'm sure there is a lot of us coming here every day to check. Truly thanks.

A serene and healthy New Year to everybody!

I visit daily.

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Re: 2020 Sea ice area and extent data
« Reply #2046 on: December 31, 2020, 08:39:02 PM »
I also appreciate very much their work. Thank you very much and happy new year.

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Re: 2020 Sea ice area and extent data
« Reply #2047 on: December 31, 2020, 09:58:31 PM »
Every year, this is my most visited thread. Across all sites.

<3

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Re: 2020 Sea ice area and extent data
« Reply #2048 on: January 01, 2021, 05:44:01 AM »
Just a quick note, to deeply thank Juan and Gerontocrat for your daily updates.
I'm sure there is a lot of us coming here every day to check. Truly thanks.

A serene and healthy New Year to everybody!
Thank you all!  :)
I hope that 2021 will be a better year than 2020 to everybody!
Happy new year!

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 31st, 2020:
     12,105,271 km2, a drop of -15,991 km2.
     2020 is now 3rd lowest on record.
     In the graph are today's 16 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

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

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #2049 on: January 01, 2021, 01:19:47 PM »
Just a quick note, to deeply thank Juan and Gerontocrat for your daily updates.
I'm sure there is a lot of us coming here every day to check. Truly thanks.

A serene and healthy New Year to everybody!
Thank you all!  :)
I hope that 2021 will be a better year than 2020 to everybody!
Happy new year!
--- ditto ----

JAXA ARCTIC SEA ICE EXTENT:  12,105,271 KM2 as at 31-Dec-2020

- Extent loss on this day 16k, 56 k less than the average gain on this day (of the last 10 years) of 40k,
- Extent gain from minimum on this date is 8,550 k, which is 644 k, 8% more than the 10 year average of 7,907 k.

- Extent is at position #3 in the satellite record

- Extent is  249 k LESS than 2019,
- Extent is  8 k MORE than 2016,
- Extent is  323 k LESS than 2012
- Extent is  554 k LESS than 2007
- Extent is  185 k LESS than the 2010's Average
_____________________________________________
On average 80.4% of extent gains  from minimum to maximum done, and 70 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.03 million km2, 0.16 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"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)