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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1900 on: November 23, 2020, 12:03:06 PM »
JAXA ARCTIC SEA ICE EXTENT:  9,304,459 KM2 as at 22-Nov-2020

- Extent gain on this day 183k, 97 k more than the average gain on this day (of the last 10 years) of 86k,
- Extent gain from minimum on this date is 5,750 k, which is 396 k, 7% more than the 10 year average of 5,353 k.

- Extent is at position #2 in the satellite record

- Extent is  273 k LESS than 2019,
- Extent is  594 k MORE than 2016,
- Extent is  362 k LESS than 2012
- Extent is  686 k LESS than 2007
- Extent is  404 k LESS than the 2010's Average
_____________________________________________
On average 54.3% of extent gains  from minimum to maximum done, and 109 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.82 million km2, 0.06 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
Whoops
_______________________________________________________________
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 #1901 on: November 23, 2020, 02:32:33 PM »
NSIDC Total EXTENT as at 22-Nov-2020 (5 day trailing average) 9,304,250 KM2         
         
Total EXTENT         
 9,304,250    km2      
-580,432    km2   <   2010's average.
-439,698    km2   <   2019
-1,113,262    km2   <   2000's average.
         
Total Change    93    k   gain
Peripheral Seas    67    k   gain
Central Seas___    26    k   gain
         
Peripheral Seas         
Okhotsk______    1    k   gain
Bering _______    2    k   gain
Hudson Bay___    47    k   gain
Baffin  Bay____    10    k   gain
St Lawrence___   -0    k   loss
Greenland____    7    k   gain
Barents ______   -1    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    0    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    0    k   gain
Central Arctic_    18    k   gain
Laptev_______    -    k   loss
Kara_________    8    k   gain
         
NSIDC Sea ice EXTENT gain on this day 93 k, 18 k more than the 2010's average gain of 75k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 580 k less than the 2010's average         
- 2020 EXTENT is 1,113 k less than the 2000's average         
- 2020 EXTENT is 611 k more than 2016         
- 2020 EXTENT is 440 k less than 2019          
- 2020 EXTENT is 538 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 22-Nov-2020 (5 day trailing average) 7,876,295 KM2         
         
Sea ice area gain on this day 106 k, 27 k more than the 2010's average gain of 79 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 711 k less than the 2010's average         
- 2020 Area is 1,353 k less than the 2000's average         
- 2020 Area is 801 k more than 2016         
- 2020 Area is 415 k less than 2019          
- 2020 Area is 770 k less than 2012   
_________________________________________
On this day the one day measures of extent and area both increased by over 200k      
___________________________________________         
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 #1902 on: November 24, 2020, 05:16:29 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 23rd, 2020:
     9,496,895 km2, a century break increase of 192,436 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 24, 2020, 05:25:51 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 #1903 on: November 24, 2020, 11:21:09 AM »
JAXA ARCTIC SEA ICE EXTENT:  9,496,895 KM2 as at 23-Nov-2020

- Extent gain on this day 192k, 92 k more than the average gain on this day (of the last 10 years) of 100k,
- Extent gain from minimum on this date is 5,942 k, which is 485 k, 9% more than the 10 year average of 5,457 k.

- Extent is at position #2 in the satellite record

- Extent is  159 k LESS than 2019,
- Extent is  678 k MORE than 2016,
- Extent is  295 k LESS than 2012
- Extent is  504 k LESS than 2007
- Extent is  312 k LESS than the 2010's Average
_____________________________________________
On average 55.3% of extent gains  from minimum to maximum done, and 108 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.91 million km2, 0.03 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
So in which seas is extent going through the roof?
_______________________________________________________________
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 #1904 on: November 24, 2020, 02:48:09 PM »
NSIDC Total EXTENT as at 23-Nov-2020 (5 day trailing average) 9,424,777 KM2         
         
Total EXTENT         
 9,424,777    km2      
-539,214    km2   <   2010's average.
-410,506    km2   <   2019
-1,053,470    km2   <   2000's average.
         
Total Change    121    k   gain
Peripheral Seas    83    k   gain
Central Seas___    38    k   gain
         
Peripheral Seas         
Okhotsk______    7    k   gain
Bering _______    4    k   gain
Hudson Bay___    58    k   gain
Baffin  Bay____    17    k   gain
St Lawrence___    0    k   gain
Greenland____    4    k   gain
Barents ______   -8    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    4    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    1    k   gain
Central Arctic_    13    k   gain
Laptev_______    -    k   loss
Kara_________    19    k   gain
         
NSIDC Sea ice EXTENT gain on this day 121 k, 42 k more than the 2010's average gain of 79k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 539 k less than the 2010's average         
- 2020 EXTENT is 1,053 k less than the 2000's average         
- 2020 EXTENT is 627 k more than 2016         
- 2020 EXTENT is 411 k less than 2019          
- 2020 EXTENT is 514 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 23-Nov-2020 (5 day trailing average) 8,001,016 KM2         
         
Sea ice area gain on this day 125 k, 38 k more than the 2010's average gain of 87 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 674 k less than the 2010's average         
- 2020 Area is 1,283 k less than the 2000's average         
- 2020 Area is 769 k more than 2016         
- 2020 Area is 438 k less than 2019          
- 2020 Area is 753 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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1905 on: November 25, 2020, 04:37:30 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 24th, 2020:
     9,552,720 km2, an increase of 55,825 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 25, 2020, 04:47:41 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 #1906 on: November 25, 2020, 12:11:04 PM »
JAXA ARCTIC SEA ICE EXTENT:  9,552,720 KM2 as at 24-Nov-2020

- Extent gain on this day 56k, 32 k less than the average gain on this day (of the last 10 years) of 88k,
- Extent gain from minimum on this date is 5,998 k, which is 445 k, 8% more than the 10 year average of 5,553 k.

- Extent is at position #2 in the satellite record

- Extent is  147 k LESS than 2019,
- Extent is  595 k MORE than 2016,
- Extent is  336 k LESS than 2012
- Extent is  476 k LESS than 2007
- Extent is  344 k LESS than the 2010's Average
_____________________________________________
On average 56.2% of extent gains  from minimum to maximum done, and 107 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.88 million km2, 0.00 million km2 below 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 #1907 on: November 25, 2020, 03:01:59 PM »
NSIDC Total EXTENT as at 24-Nov-2020 (5 day trailing average) 9,554,129 KM2         
         
Total EXTENT         
 9,554,129    km2      
-485,303    km2   <   2010's average.
-344,627    km2   <   2019
-986,457    km2   <   2000's average.
         
Total Change    129    k   gain
Peripheral Seas    95    k   gain
Central Seas___    34    k   gain
         
Peripheral Seas         
Okhotsk______    3    k   gain
Bering _______    7    k   gain
Hudson Bay___    63    k   gain
Baffin  Bay____    24    k   gain
St Lawrence___    0    k   gain
Greenland____    3    k   gain
Barents ______   -5    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    7    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    0    k   gain
Central Arctic_    6    k   gain
Laptev_______    -    k   loss
Kara_________    20    k   gain
         
NSIDC Sea ice EXTENT gain on this day 129 k, 54 k more than the 2010's average gain of 75k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 485 k less than the 2010's average         
- 2020 EXTENT is 986 k less than the 2000's average         
- 2020 EXTENT is 634 k more than 2016         
- 2020 EXTENT is 345 k less than 2019          
- 2020 EXTENT is 466 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 24-Nov-2020 (5 day trailing average) 8,153,679 KM2         
         
Sea ice area gain on this day 134 k, 50 k more than the 2010's average gain of 84 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 605 k less than the 2010's average         
- 2020 Area is 1,185 k less than the 2000's average         
- 2020 Area is 761 k more than 2016         
- 2020 Area is 402 k less than 2019          
- 2020 Area is 710 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 #1908 on: November 25, 2020, 03:28:57 PM »
Hudson Extent and Area gains very impressive.
"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 #1909 on: November 25, 2020, 03:54:39 PM »
And in the opposite direction, the lack of sea ice in the Kara is also impressive
"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 #1910 on: November 26, 2020, 04:35:20 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 25th, 2020:
     9,588,224 km2, an increase of 35,504 km2.
     2020 is 2nd lowest on record, practically even with 2006.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 26, 2020, 04:43:56 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 #1911 on: November 26, 2020, 10:15:51 AM »
JAXA ARCTIC SEA ICE EXTENT:  9,588,224 KM2 as at 25-Nov-2020

- Extent gain on this day 36k, 33 k less than the average gain on this day (of the last 10 years) of 69k,
- Extent gain from minimum on this date is 6,033 k, which is 408 k, 7% more than the 10 year average of 5,626 k.

- Extent is at position #2 in the satellite record

- Extent is  170 k LESS than 2019,
- Extent is  499 k MORE than 2016,
- Extent is  403 k LESS than 2012
- Extent is  480 k LESS than 2007
- Extent is  378 k LESS than the 2010's Average
_____________________________________________
On average 56.9% of extent gains  from minimum to maximum done, and 106 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.84 million km2, 0.04 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
Daily extent gains up and down like a yo-yo -  now back to the down phase for a bit?
_______________________________________________________________
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 #1912 on: November 26, 2020, 02:50:47 PM »
NSIDC Total EXTENT as at 25-Nov-2020 (5 day trailing average) 9,673,646 KM2         
         
Total EXTENT         
 9,673,646    km2      
-441,786    km2   <   2010's average.
-287,177    km2   <   2019
-935,126    km2   <   2000's average.
         
Total Change    120    k   gain
Peripheral Seas    93    k   gain
Central Seas___    26    k   gain
         
Peripheral Seas         
Okhotsk______    2    k   gain
Bering _______   -1    k   loss
Hudson Bay___    67    k   gain
Baffin  Bay____    26    k   gain
St Lawrence___   -1    k   loss
Greenland____    7    k   gain
Barents ______   -7    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    10    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    0    k   gain
Central Arctic_    1    k   gain
Laptev_______    -    k   loss
Kara_________    15    k   gain
         
NSIDC Sea ice EXTENT gain on this day 120 k, 44 k more than the 2010's average gain of 76k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 442 k less than the 2010's average         
- 2020 EXTENT is 935 k less than the 2000's average         
- 2020 EXTENT is 632 k more than 2016         
- 2020 EXTENT is 287 k less than 2019          
- 2020 EXTENT is 441 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 25-Nov-2020 (5 day trailing average) 8,323,768 KM2         
         
Sea ice area gain on this day 145 k, 58 k more than the 2010's average gain of 87 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 522 k less than the 2010's average         
- 2020 Area is 1,065 k less than the 2000's average         
- 2020 Area is 777 k more than 2016         
- 2020 Area is 334 k less than 2019          
- 2020 Area is 647 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 #1913 on: November 26, 2020, 02:56:33 PM »
Hudson Bay with a 68k 5-day trailing average daily extent increase is more than impressive.
"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 #1914 on: November 27, 2020, 05:26:04 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 26th, 2020:
     9,583,879 km2, a small drop of -4,345 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 27, 2020, 05:37:17 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 #1915 on: November 27, 2020, 10:49:55 AM »
JAXA ARCTIC SEA ICE EXTENT:  9,583,879 KM2 as at 26-Nov-2020

- Extent loss on this day 4k, 90 k less than the average gain on this day (of the last 10 years) of 86k,
- Extent gain from minimum on this date is 6,029 k, which is 315 k, 6% more than the 10 year average of 5,714 k.

- Extent is at position #2 in the satellite record

- Extent is  238 k LESS than 2019,
- Extent is  360 k MORE than 2016,
- Extent is  466 k LESS than 2012
- Extent is  555 k LESS than 2007
- Extent is  467 k LESS than the 2010's Average
_____________________________________________
On average 57.8% of extent gains  from minimum to maximum done, and 105 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.75 million km2, 0.13 million km2 below 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 #1916 on: November 27, 2020, 04:05:55 PM »
NSIDC Total EXTENT as at 26-Nov-2020 (5 day trailing average) 9,766,763 KM2         
         
Total EXTENT         
 9,766,763    km2      
-431,221    km2   <   2010's average.
-266,268    km2   <   2019
-918,835    km2   <   2000's average.
         
Total Change    93    k   gain
Peripheral Seas    90    k   gain
Central Seas___    4    k   gain
         
Peripheral Seas         
Okhotsk______    0    k   gain
Bering _______   -2    k   loss
Hudson Bay___    60    k   gain
Baffin  Bay____    18    k   gain
St Lawrence___    0    k   gain
Greenland____    5    k   gain
Barents ______    7    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    6    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__   -7    k   loss
Central Arctic_   -1    k   loss
Laptev_______    -    k   loss
Kara_________    6    k   gain
         
NSIDC Sea ice EXTENT gain on this day 93 k, 10 k more than the 2010's average gain of 83k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 431 k less than the 2010's average         
- 2020 EXTENT is 919 k less than the 2000's average         
- 2020 EXTENT is 598 k more than 2016         
- 2020 EXTENT is 266 k less than 2019          
- 2020 EXTENT is 459 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 26-Nov-2020 (5 day trailing average) 8,444,909 KM2         
         
Sea ice area gain on this day 121 k, 31 k more than the 2010's average gain of 90 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 490 k less than the 2010's average         
- 2020 Area is 1,001 k less than the 2000's average         
- 2020 Area is 759 k more than 2016         
- 2020 Area is 305 k less than 2019          
- 2020 Area is 628 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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1917 on: November 28, 2020, 04:51:25 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 27th, 2020:
     9,609,469 km2, an increase of 25,590 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 28, 2020, 05:12:21 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 #1918 on: November 28, 2020, 11:38:40 AM »
JAXA ARCTIC SEA ICE EXTENT:  9,609,469 KM2 as at 27-Nov-2020

- Extent gain on this day 26k, 54 k less than the average gain on this day (of the last 10 years) of 80k,
- Extent gain from minimum on this date is 6,055 k, which is 257 k, 4% more than the 10 year average of 5,798 k.

- Extent is at position #2 in the satellite record

- Extent is  243 k LESS than 2019,
- Extent is  271 k MORE than 2016,
- Extent is  466 k LESS than 2012
- Extent is  551 k LESS than 2007
- Extent is  521 k LESS than the 2010's Average
_____________________________________________
On average 58.6% of extent gains  from minimum to maximum done, and 104 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.70 million km2, 0.18 million km2 below 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 #1919 on: November 28, 2020, 02:55:48 PM »
NSIDC Total EXTENT as at 27-Nov-2020 (5 day trailing average) 9,818,741 KM2         
         
Total EXTENT         
 9,818,741    km2      
-464,605    km2   <   2010's average.
-253,954    km2   <   2019
-939,930    km2   <   2000's average.
         
Total Change    52    k   gain
Peripheral Seas    58    k   gain
Central Seas___   -6    k   loss
         
Peripheral Seas         
Okhotsk______   -2    k   loss
Bering _______    1    k   gain
Hudson Bay___    39    k   gain
Baffin  Bay____    16    k   gain
St Lawrence___    1    k   gain
Greenland____    5    k   gain
Barents ______   -2    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    5    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__   -9    k   loss
Central Arctic_   -2    k   loss
Laptev_______    -    k   loss
Kara_________    0    k   gain
         
NSIDC Sea ice EXTENT gain on this day 52 k, 33 k less than the 2010's average gain of 85k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 465 k less than the 2010's average         
- 2020 EXTENT is 940 k less than the 2000's average         
- 2020 EXTENT is 520 k more than 2016         
- 2020 EXTENT is 254 k less than 2019          
- 2020 EXTENT is 494 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 27-Nov-2020 (5 day trailing average) 8,518,875 KM2         
         
Sea ice area gain on this day 74 k, 13 k less than the 2010's average gain of 87 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 504 k less than the 2010's average         
- 2020 Area is 990 k less than the 2000's average         
- 2020 Area is 708 k more than 2016         
- 2020 Area is 283 k less than 2019          
- 2020 Area is 608 k less than 2012   
_____________________________________________
Both area and extent gains below average for the first time since some time ago.      
___________________________________________         
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 #1920 on: November 29, 2020, 04:52:08 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 28th, 2020:
     9,657,585 km2, an increase of 48,116 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
     2007 has not official value, average used.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 29, 2020, 05:04:02 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 #1921 on: November 29, 2020, 11:22:31 AM »
JAXA ARCTIC SEA ICE EXTENT:  9,657,585 KM2 as at 28-Nov-2020

- Extent gain on this day 48k, 32 k less than the average gain on this day (of the last 10 years) of 80k,
- Extent gain from minimum on this date is 6,103 k, which is 229 k, 4% more than the 10 year average of 5,873 k.

- Extent is at position #2 in the satellite record

- Extent is  277 k LESS than 2019,
- Extent is  194 k MORE than 2016,
- Extent is  455 k LESS than 2012
- Extent is  602 k LESS than 2007
- Extent is  553 k LESS than the 2010's Average
_____________________________________________
On average 59.4% of extent gains  from minimum to maximum done, and 103 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.67 million km2, 0.21 million km2 below 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 #1922 on: November 29, 2020, 07:53:24 PM »
Whoops, late on parade.

NSIDC Total EXTENT as at 28-Nov-2020 (5 day trailing average) 9,840,608 KM2         
         
Total EXTENT         
 9,840,608    km2      
-527,400    km2   <   2010's average.
-284,389    km2   <   2019
-989,940    km2   <   2000's average.
         
Total Change    22    k   gain
Peripheral Seas    38    k   gain
Central Seas___   -16    k   loss
         
Peripheral Seas         
Okhotsk______   -6    k   loss
Bering _______   -1    k   loss
Hudson Bay___    31    k   gain
Baffin  Bay____    12    k   gain
St Lawrence___   -1    k   loss
Greenland____    6    k   gain
Barents ______   -2    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    6    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__   -7    k   loss
Central Arctic_   -8    k   loss
Laptev_______    -    k   loss
Kara_________   -7    k   loss
         
NSIDC Sea ice EXTENT gain on this day 22 k, 63 k less than the 2010's average gain of 85k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 527 k less than the 2010's average         
- 2020 EXTENT is 990 k less than the 2000's average         
- 2020 EXTENT is 405 k more than 2016         
- 2020 EXTENT is 284 k less than 2019          
- 2020 EXTENT is 553 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 28-Nov-2020 (5 day trailing average) 8,555,264 KM2         
         
Sea ice area gain on this day 36 k, 47 k less than the 2010's average gain of 83 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 551 k less than the 2010's average         
- 2020 Area is 1,018 k less than the 2000's average         
- 2020 Area is 622 k more than 2016         
- 2020 Area is 314 k less than 2019          
- 2020 Area is 607 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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1923 on: November 30, 2020, 04:35:25 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 29th, 2020:
     9,713,193 km2, an increase of 55,608 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
     2007 has not official value, average used.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 30, 2020, 04:45:11 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.

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1924 on: November 30, 2020, 10:49:56 AM »
JAXA ARCTIC SEA ICE EXTENT:  9,713,193 KM2 as at 29-Nov-2020

- Extent gain on this day 56k, 36 k less than the average gain on this day (of the last 10 years) of 92k,
- Extent gain from minimum on this date is 6,158 k, which is 199 k, 3% more than the 10 year average of 5,959 k.

- Extent is at position #2 in the satellite record

- Extent is  297 k LESS than 2019,
- Extent is  142 k MORE than 2016,
- Extent is  559 k LESS than 2012
- Extent is  612 k LESS than 2007
- Extent is  589 k LESS than the 2010's Average
_____________________________________________
On average 60.3% of extent gains  from minimum to maximum done, and 102 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.63 million km2, 0.25 million km2 below 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 #1925 on: November 30, 2020, 02:23:28 PM »
NSIDC Total EXTENT as at 29-Nov-2020 (5 day trailing average) 9,867,384 KM2         
         
Total EXTENT         
 9,867,384    km2      
-590,291    km2   <   2010's average.
-334,560    km2   <   2019
-1,033,678    km2   <   2000's average.
         
Total Change    27    k   gain
Peripheral Seas    35    k   gain
Central Seas___   -8    k   loss
         
Peripheral Seas         
Okhotsk______    1    k   gain
Bering _______   -3    k   loss
Hudson Bay___    18    k   gain
Baffin  Bay____    9    k   gain
St Lawrence___   -1    k   loss
Greenland____    7    k   gain
Barents ______    4    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    8    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    1    k   gain
Central Arctic_   -5    k   loss
Laptev_______    -    k   loss
Kara_________   -13    k   loss
         
NSIDC Sea ice EXTENT gain on this day 27 k, 63 k less than the 2010's average gain of 90k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 590 k less than the 2010's average         
- 2020 EXTENT is 1,034 k less than the 2000's average         
- 2020 EXTENT is 305 k more than 2016         
- 2020 EXTENT is 335 k less than 2019          
- 2020 EXTENT is 606 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 29-Nov-2020 (5 day trailing average) 8,573,367 KM2         
         
Sea ice area gain on this day 18 k, 64 k less than the 2010's average gain of 82 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 614 k less than the 2010's average         
- 2020 Area is 1,066 k less than the 2000's average         
- 2020 Area is 522 k more than 2016         
- 2020 Area is 372 k less than 2019          
- 2020 Area is 613 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 #1926 on: November 30, 2020, 02:45:23 PM »
To partly reinforce Oren's post on the Freezing thread - here are graphs of extent and area for the 7 seas of the High Arctic and the 7 peripheral seas.

High Arctic sea ice extent is lowest, but High Arcctic sea ice area not quite lowest - probably using the 5 day trailing average just delays the inevitable by a couple of days. This is mostly due to slow refreeze in the Chukchi plus recent sea ice losses / low gains in the Kara and Central Arctic.

Sea ice area and extent of the peripheral seas is not lowest, extent 6th lowest, area 9th lowest. This is mostly about very high sea ice gains in Hudson Bay & the Greenland Sea.
« Last Edit: November 30, 2020, 02:57:57 PM by gerontocrat »
"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 #1927 on: December 01, 2020, 04:45:07 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 30th, 2020:
     9,798,051 km2, an increase of 84,858 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 01, 2020, 04:57:50 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 #1928 on: December 01, 2020, 12:09:27 PM »
JAXA ARCTIC SEA ICE EXTENT:  9,798,051 KM2 as at 30-Nov-2020

- Extent gain on this day 85k, 2 k less than the average gain on this day (of the last 10 years) of 87k,
- Extent gain from minimum on this date is 6,243 k, which is 205 k, 3% more than the 10 year average of 6,038 k.

- Extent is at position #2 in the satellite record

- Extent is  309 k LESS than 2019,
- Extent is  125 k MORE than 2016,
- Extent is  594 k LESS than 2012
- Extent is  687 k LESS than 2007
- Extent is  591 k LESS than the 2010's Average
_____________________________________________
On average 61.2% of extent gains  from minimum to maximum done, and 101 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.63 million km2, 0.25 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
Note how at the moment 2006 extent is less than 100k greater than 2020
_______________________________________________________________
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 #1929 on: December 01, 2020, 02:46:11 PM »
NSIDC Total EXTENT as at 30-Nov-2020 (5 day trailing average) 9,906,185 KM2         
         
Total EXTENT         
 9,906,185    km2      
-637,458    km2   <   2010's average.
-367,618    km2   <   2019
-1,064,549    km2   <   2000's average.
         
Total Change    39    k   gain
Peripheral Seas    36    k   gain
Central Seas___    3    k   gain
         
Peripheral Seas         
Okhotsk______    3    k   gain
Bering _______   -1    k   loss
Hudson Bay___    15    k   gain
Baffin  Bay____    9    k   gain
St Lawrence___    0    k   gain
Greenland____    4    k   gain
Barents ______    5    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    12    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    3    k   gain
Central Arctic_    1    k   gain
Laptev_______    -    k   loss
Kara_________   -14    k   loss
         
NSIDC Sea ice EXTENT gain on this day 39 k, 47 k less than the 2010's average gain of 86k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 637 k less than the 2010's average         
- 2020 EXTENT is 1,065 k less than the 2000's average         
- 2020 EXTENT is 218 k more than 2016         
- 2020 EXTENT is 368 k less than 2019          
- 2020 EXTENT is 646 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 30-Nov-2020 (5 day trailing average) 8,589,311 KM2         
         
Sea ice area gain on this day 16 k, 58 k less than the 2010's average gain of 74 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 673 k less than the 2010's average         
- 2020 Area is 1,120 k less than the 2000's average         
- 2020 Area is 427 k more than 2016         
- 2020 Area is 420 k less than 2019          
- 2020 Area is 620 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 #1930 on: December 01, 2020, 03:44:47 PM »
JAXA Data - a bit more

The November monthly average graph is attached.
At 8.68 million km2, the average is
- 2nd lowest, nearly 300k above 2016 (lowest)
- more than 300k below 2019 (3rd lowest),
- and 367k below the linear trend vlaue, equivalent to about 7 years annual average extent reduction.

If December extent gains are at the aveage of then last 10 years, the December monthly average, at 10.87 million km2, would be lowest in the satellite record by 130k, some 329k below the linear trend.

I also attach the plume of projected 221 maxima and the daily change for selected years to March 2021.
« Last Edit: December 02, 2020, 12:07:35 PM by gerontocrat »
"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 #1931 on: December 02, 2020, 04:32:11 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 1st, 2020:
     9,920,267 km2, a century break increase of 122,216 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 02, 2020, 05:30:33 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 #1932 on: December 02, 2020, 12:02:51 PM »
JAXA ARCTIC SEA ICE EXTENT:  9,920,267 KM2 as at 01-Dec-2020

- Extent gain on this day 122k, 62 k more than the average gain on this day (of the last 10 years) of 60k,
- Extent gain from minimum on this date is 6,365 k, which is 261 k, 4% more than the 10 year average of 6,105 k.

- Extent is at position #2 in the satellite record

- Extent is  211 k LESS than 2019,
- Extent is  159 k MORE than 2016,
- Extent is  567 k LESS than 2012
- Extent is  512 k LESS than 2007
- Extent is  530 k LESS than the 2010's Average
_____________________________________________
On average 61.8% of extent gains  from minimum to maximum done, and 100 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.69 million km2, 0.19 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
A return to a very high extent gain - for how long?
_______________________________________________________________
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 #1933 on: December 02, 2020, 02:44:13 PM »
NSIDC Total EXTENT as at 01-Dec-2020 (5 day trailing average) 10,011,683 KM2         
         
Total EXTENT         
 10,011,683    km2      
-624,485    km2   <   2010's average.
-327,020    km2   <   2019
-1,037,530    km2   <   2000's average.
         
Total Change    105    k   gain
Peripheral Seas    82    k   gain
Central Seas___    23    k   gain
         
Peripheral Seas         
Okhotsk______    15    k   gain
Bering _______    7    k   gain
Hudson Bay___    14    k   gain
Baffin  Bay____    19    k   gain
St Lawrence___    11    k   gain
Greenland____    10    k   gain
Barents ______    7    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    22    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    11    k   gain
Central Arctic_    4    k   gain
Laptev_______    -    k   loss
Kara_________   -13    k   loss
         
NSIDC Sea ice EXTENT gain on this day 105 k, 12 k more than the 2010's average gain of 93k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 624 k less than the 2010's average         
- 2020 EXTENT is 1,038 k less than the 2000's average         
- 2020 EXTENT is 195 k more than 2016         
- 2020 EXTENT is 327 k less than 2019          
- 2020 EXTENT is 616 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 01-Dec-2020 (5 day trailing average) 8,636,731 KM2         
         
Sea ice area gain on this day 47 k, 24 k less than the 2010's average gain of 71 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 696 k less than the 2010's average         
- 2020 Area is 1,145 k less than the 2000's average         
- 2020 Area is 370 k more than 2016         
- 2020 Area is 435 k less than 2019          
- 2020 Area is 601 k less than 2012   
__________________________________
Massive increase in daily extent gain - partly due to that NSIDC changes the mask - affects some of the peripheral seas.      
______________________
_____________________         
Note: Click an image for full-size      
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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1934 on: December 02, 2020, 03:03:40 PM »
NSIDC Data - a bit more

I attach the table of High Arctic Seas area data.

These three seas are currently losing sea ice area.
- You will se that despite that Laptev extent is 100% complete, area is not. Winter sea ice is starting to show signs of fragility.
- The Kara area graph is stunning - less than half the ice area of the 2010's average.
- The Central Arctic is still not quite reaching 80 North.

The Atlantic front looks like being the event of this freezing season at least until until the new year?

ps: The Barents sea ice area and extent are both currently lowest in the satellite record
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oren

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Re: 2020 Sea ice area and extent data
« Reply #1935 on: December 02, 2020, 03:58:04 PM »
NSIDC Total EXTENT as at 01-Dec-2020 (5 day trailing average) 10,011,683 KM2
Gero, didn't this daily post use to be about area? There seems to be some duplication with the previous post. Is the extent chart the same as the one in that post? Whatever happened to the area chart...?

BornFromTheVoid

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Re: 2020 Sea ice area and extent data
« Reply #1936 on: December 02, 2020, 04:23:57 PM »
Also, it looks like there were large areas of missing data and loads of false coastal ice in the latest daily extent image, particularly in the Sea of Japan and Gulf of St. Lawrence. I suspect that these have also added to the massive daily increase. I'd expect a steep downward correction tomorrow.

I recently joined the twitter thing, where I post more analysis, pics and animations: @Icy_Samuel

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1937 on: December 02, 2020, 05:29:19 PM »
NSIDC Total EXTENT as at 01-Dec-2020 (5 day trailing average) 10,011,683 KM2
Gero, didn't this daily post use to be about area? There seems to be some duplication with the previous post. Is the extent chart the same as the one in that post? Whatever happened to the area chart...?
I wrote in a recent post that during the melting season area loss was the leading indicator, while in the freezing season extent gain was the leading indicator.

So I said I was switching to extent data for the freezing season - but with a proviso, that if area in individual seas behaved oddly I would post the area data.

What can one do ? add an explanatory note every day?
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oren

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Re: 2020 Sea ice area and extent data
« Reply #1938 on: December 02, 2020, 05:48:06 PM »
I recall the post, no need to add reminders, sorry about the confusion. It's just that the extent chart seems duplicated.

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1939 on: December 02, 2020, 06:48:34 PM »
I recall the post, no need to add reminders, sorry about the confusion. It's just that the extent chart seems duplicated.
Hullo oren,

Look at the Laptev data
Extent 100% done
Area nearly 50k area loss in the last 3 days.

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oren

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Re: 2020 Sea ice area and extent data
« Reply #1940 on: December 02, 2020, 07:18:57 PM »
Sorry again about the confusion.
I now see one of them is JAXA extent and the other NSIDC extent. I should learn to read the fine print. Back to silence, sorry.

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1941 on: December 02, 2020, 07:23:33 PM »
Sorry again about the confusion.
I now see one of them is JAXA extent and the other NSIDC extent. I should learn to read the fine print. Back to silence, sorry.
Huff and Puff and Outrage...

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Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1942 on: December 03, 2020, 04:41:57 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 2nd, 2020:
     10,085,459 km2, a century break increase of 165,192 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 03, 2020, 04:52:45 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 #1943 on: December 03, 2020, 10:31:21 AM »
JAXA ARCTIC SEA ICE EXTENT:  10,085,459 KM2 as at 02-Dec-2020

- Extent gain on this day 165k, 96 k more than the average gain on this day (of the last 10 years) of 69k,
- Extent gain from minimum on this date is 6,531 k, which is 353 k, 6% more than the 10 year average of 6,178 k.

- Extent is at position #2 in the satellite record

- Extent is  101 k LESS than 2019,
- Extent is  192 k MORE than 2016,
- Extent is  443 k LESS than 2012
- Extent is  318 k LESS than 2007
- Extent is  433 k LESS than the 2010's Average
_____________________________________________
On average 62.5% of extent gains  from minimum to maximum done, and 99 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.79 million km2, 0.09 million km2 below the March 2017 record low maximum of 13.88 million km2.
___________________________________________________________
A return to a very high extent gain for a 2nd day- for how long?
_______________________________________________________________
N.B. Click on image to enlarge
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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1944 on: December 03, 2020, 02:22:08 PM »
NSIDC Total EXTENT as at 02-Dec-2020 (5 day trailing average) 10,136,883 KM2         
         
Total EXTENT         
 10,136,883    km2      
-590,820    km2   <   2010's average.
-292,255    km2   <   2019
-993,723    km2   <   2000's average.
         
Total Change    125    k   gain
Peripheral Seas    88    k   gain
Central Seas___    37    k   gain
         
Peripheral Seas         
Okhotsk______    11    k   gain
Bering _______    6    k   gain
Hudson Bay___    18    k   gain
Baffin  Bay____    25    k   gain
St Lawrence___    10    k   gain
Greenland____    13    k   gain
Barents ______    5    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    25    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    13    k   gain
Central Arctic_    9    k   gain
Laptev_______    -    k   loss
Kara_________   -10    k   loss
         
NSIDC Sea ice EXTENT gain on this day 125 k, 33 k more than the 2010's average gain of 92k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 591 k less than the 2010's average         
- 2020 EXTENT is 994 k less than the 2000's average         
- 2020 EXTENT is 185 k more than 2016         
- 2020 EXTENT is 292 k less than 2019          
- 2020 EXTENT is 596 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 02-Dec-2020 (5 day trailing average) 8,694,627 KM2         
         
Sea ice area gain on this day 58 k, 12 k less than the 2010's average gain of 70 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 708 k less than the 2010's average         
- 2020 Area is 1,152 k less than the 2000's average         
- 2020 Area is 327 k more than 2016         
- 2020 Area is 460 k less than 2019          
- 2020 Area is 623 k less than 2012         
___________________________________________         
Note: Click an image for full-size         
"Para a Causa do Povo a Luta Continua!"
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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1945 on: December 03, 2020, 02:35:24 PM »
NSIDC Graphs

While the Greenland accumulates sea ice (mostly from export?) the Kara for the last 3 weeks has overall been losing sea ice.

Quite a contrast
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Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1946 on: December 04, 2020, 05:12:20 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 3rd, 2020:
     10,147,633 km2, an increase of 62,174 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
     2007 has not official value. Average used.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 04, 2020, 05:25:39 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 #1947 on: December 04, 2020, 01:47:54 PM »
JAXA ARCTIC SEA ICE EXTENT:  10,147,633 KM2 as at 03-Dec-2020

- Extent gain on this day 62k, 4 k less than the average gain on this day (of the last 10 years) of 66k,
- Extent gain from minimum on this date is 6,593 k, which is 346 k, 6% more than the 10 year average of 6,247 k.

- Extent is at position #2 in the satellite record

- Extent is  119 k LESS than 2019,
- Extent is  150 k MORE than 2016,
- Extent is  492 k LESS than 2012
- Extent is  352 k LESS than 2007
- Extent is  437 k LESS than the 2010's Average
_____________________________________________
On average 63.2% of extent gains  from minimum to maximum done, and 98 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.78 million km2, 0.10 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
After 2 days of extreme gains, are we back to moderate gains for a bit?
_______________________________________________________________
N.B. Click on image to enlarge
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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1948 on: December 04, 2020, 03:32:05 PM »
NSIDC Total EXTENT as at 03-Dec-2020 (5 day trailing average) 10,266,720 KM2         
         
Total EXTENT         
 10,266,720    km2      
-554,476    km2   <   2010's average.
-252,357    km2   <   2019
-949,056    km2   <   2000's average.
         
Total Change    130    k   gain
Peripheral Seas    80    k   gain
Central Seas___    50    k   gain
         
Peripheral Seas         
Okhotsk______    13    k   gain
Bering _______    3    k   gain
Hudson Bay___    19    k   gain
Baffin  Bay____    28    k   gain
St Lawrence___    6    k   gain
Greenland____   -1    k   loss
Barents ______    12    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    26    k   gain
Beaufort_____    -    k   loss
CAA_________    -    k   loss
East Siberian__    10    k   gain
Central Arctic_    16    k   gain
Laptev_______    -    k   loss
Kara_________   -3    k   loss
         
NSIDC Sea ice EXTENT gain on this day 130 k, 37 k more than the 2010's average gain of 93k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 554 k less than the 2010's average         
- 2020 EXTENT is 949 k less than the 2000's average         
- 2020 EXTENT is 197 k more than 2016         
- 2020 EXTENT is 252 k less than 2019          
- 2020 EXTENT is 585 k less than 2012         
___________________________________________________________________         
NSIDC Total AREA as at 03-Dec-2020 (5 day trailing average) 8,750,962 KM2         
         
Sea ice area gain on this day 56 k, 13 k less than the 2010's average gain of 69 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 720 k less than the 2010's average         
- 2020 Area is 1,160 k less than the 2000's average         
- 2020 Area is 292 k more than 2016         
- 2020 Area is 480 k less than 2019          
- 2020 Area is 669 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)

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1949 on: December 05, 2020, 04:37:06 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

December 4th, 2020:
     10,174,699 km2, an increase of 27,066 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: December 06, 2020, 04:34:00 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.