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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1800 on: October 31, 2020, 01:57:38 PM »
JAXA ARCTIC SEA ICE EXTENT:  6,548,425 KM2 as at 30-Oct-2020

- Extent gain on this day 285k, 177 k more than the average gain on this day (of the last 10 years) of 108k,
- Extent gain from minimum on this date is 2,994 k, which is 612 k, 17% less than the 10 year average of 3,606 k.
- Extent is at position #1 in the satellite record

- Extent is  828 k LESS than 2019,
- Extent is  373 k LESS than 2016,
- Extent is  970 k LESS than 2012
- Extent is  1,469 k LESS than 2007
- Extent is  1,364 k LESS than the 2010's Average
_____________________________________________
On average 36.4% of extent gains  from minimum to maximum done, and 132 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 12.86 million km2, 1.02 million km2 below the March 2017 record low maximum of 13.88 million km2.

For the 2020-21 maximum NOT to be a record low, remaining extent gain has to be more than 16.2% above the average remaining extent gain of the last 10 years. This is greater than any of at least the last 13 years.
______________________________________________________
This seems to be 2020 following 2019 (and 2012 and 2007) but just a a few days later.

2 more days of +200k daily sea ice extent gains would see 2020 extent toppled off its #1 perch by 2016.
_______________________________________________________________
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 #1801 on: October 31, 2020, 02:56:25 PM »
NSIDC Total AREA as at 30-Oct-2020 (5 day trailing average) 5,083,783 KM2         
         
Total Area         
 5,083,783    km2      
-1,372,133    km2   <   2010's average.
-665,361    km2   <   2019
-2,421,214    km2   <   2000's average.
         
Total Change    143    k   gain
Peripheral Seas    11    k   gain
Central Seas___    132    k   gain
         
Peripheral Seas         
Okhotsk______   -2    k   loss
Bering _______   -0    k   loss
Hudson Bay___    1    k   gain
Baffin  Bay____    5    k   gain
St Lawrence___    -    k   loss
Greenland____    7    k   gain
Barents ______    1    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    16    k   gain
Beaufort_____    24    k   gain
CAA_________    29    k   gain
East Siberian__    38    k   gain
Central Arctic_   -2    k   loss
Laptev_______    13    k   gain
Kara_________    14    k   gain
         
Sea ice area gain on this day 143 k, 20 k more than the 2010's average gain of 123 k         
         
- 2020 area is at position #1 in the satellite record.         
- 2020 Area is 1,372 k less than the 2010's average         
- 2020 Area is 2,421 k less than the 2000's average         
- 2020 Area is 205 k less than 2016         
- 2020 Area is 665 k less than 2019          
- 2020 Area is 1,100 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 30-Oct-2020 (5 day trailing average) 6,255,035 KM2         
         
NSIDC Sea ice EXTENT gain on this day 171 k, 61 k more than the 2010's average gain of 110k         
         
- 2020 EXTENT is at position #1 in the satellite record.         
- 2020 EXTENT is 1,687 k less than the 2010's average         
- 2020 EXTENT is 2,581 k less than the 2000's average         
- 2020 EXTENT is 785 k less than 2016         
- 2020 EXTENT is 971 k less than 2019          
- 2020 EXTENT is 1,299 k less than 2012   
__________________________________________
Looks very much like the freezing season starting to do a catch-up as in 2007, 2012, 2019 but NOT 2016.

Both 5 day average area and extent daily gains well above average. The DAILY extent gains in the last 3 days are very high.
   NSIDC daily extent change in Km2 Million
26 October 2020   0.083
27 October 2020   0.104
28 October 2020   0.181
29 October 2020   0.299
30 October 2020   0.188
      
___________________________________________         
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 #1802 on: November 01, 2020, 04:36:18 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 31st, 2020:
     6,779,529 km2, a double century break increase of 231,104 km2.
     2020 is the lowest on record on this date.
     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 01, 2020, 04:47:21 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 #1803 on: November 01, 2020, 10:55:31 AM »
JAXA ARCTIC SEA ICE EXTENT:  6,779,529 KM2 as at 31-Oct-2020

- Extent gain on this day 231k, 115 k more than the average gain on this day (of the last 10 years) of 116k,
- Extent gain from minimum on this date is 3,225 k, which is 492 k, 13% less than the 10 year average of 3,717 k.

- Extent is at position #1 in the satellite record

- Extent is  745 k LESS than 2019,
- Extent is  187 k LESS than 2016,
- Extent is  876 k LESS than 2012
- Extent is  1,343 k LESS than 2007
- Extent is  1,249 k LESS than the 2010's Average
_____________________________________________
On average 37.5% of extent gains  from minimum to maximum done, and 131 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 12.97 million km2, 0.91 million km2 below the March 2017 record low maximum of 13.88 million km2.

For the 2020-21 maximum NOT to be a record low, remaining extent gain has to be more than 14.7% above the average remaining extent gain of the last 10 years. This is greater than any of at least the last 13 years.
____________________________________________
If daily sea ice extent gain on 1 November is greater than 260k, 2016 sea ice extent becomes lowest in the satellite record.
If daily extent gains gradually moderate over the next few days to something like average for the time of year, 2020 could retain the #1 position.
_______________________________________________________________
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 #1804 on: November 01, 2020, 11:48:02 AM »
JAXA Data
- October Monthly Averages


Despite the last few days of very high daily extent gains the monthly sea ice extent average for October is more than impressive, building on the impressive 2019 data.

The October 2019 average of 5.48 million km2 was a record low, 0.15 million km2 less than the record low of 2012.

The October 2020 average of 5.05 million km2 is 0.43 million km2 less than 2019, and 0.58 million km2 less than 2012.

Two record lows in succession in October is unique in the satellite record. The 2020 value is 0.99 million km2 (or 11 years) below the linear trend value. Climate scientists have been telling us that we should expect reductions in sea ice extent to push later into the year. Is 2020 telling us the shape of things to come?

- Daily Change
I also attach the graph of daily sea ice extent change, using the 7 day trailing averages which shows the patterns more clearly. It is showing that at the moment 2020 daily change is rebounding as in 2007, 2012 and 2019, but a few days later. Will November show the catch-up continuing as in 2019, or will....

"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 #1805 on: November 01, 2020, 02:48:23 PM »
NSIDC Total AREA as at 31-Oct-2020 (5 day trailing average) 5,230,216 KM2         
         
Total Area         
 5,230,216    km2      
-1,352,052    km2   <   2010's average.
-686,155    km2   <   2019
-2,386,785    km2   <   2000's average.
         
Total Change    146    k   gain
Peripheral Seas    8    k   gain
Central Seas___    139    k   gain
         
Peripheral Seas         
Okhotsk______   -0    k   loss
Bering _______   -1    k   loss
Hudson Bay___    1    k   gain
Baffin  Bay____    6    k   gain
St Lawrence___    -    k   loss
Greenland____    3    k   gain
Barents ______   -1    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    19    k   gain
Beaufort_____    17    k   gain
CAA_________    35    k   gain
East Siberian__    39    k   gain
Central Arctic_   -3    k   loss
Laptev_______    18    k   gain
Kara_________    14    k   gain
         
Sea ice area gain on this day 146 k, 20 k more than the 2010's average gain of 126 k         
         
- 2020 area is at position #1 in the satellite record.         
- 2020 Area is 1,352 k less than the 2010's average         
- 2020 Area is 2,387 k less than the 2000's average         
- 2020 Area is 97 k less than 2016         
- 2020 Area is 686 k less than 2019          
- 2020 Area is 1,089 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 31-Oct-2020 (5 day trailing average) 6,446,984 KM2         
         
NSIDC Sea ice EXTENT gain on this day 192 k, 81 k more than the 2010's average gain of 111k         
         
- 2020 EXTENT is at position #1 in the satellite record.         
- 2020 EXTENT is 1,607 k less than the 2010's average         
- 2020 EXTENT is 2,477 k less than the 2000's average         
- 2020 EXTENT is 615 k less than 2016         
- 2020 EXTENT is 979 k less than 2019          
- 2020 EXTENT is 1,214 k less than 2012   
_________________________________________
In a day or two 2020 NSIDC sea ice area will lose its #1 spot to 2016.
At the current rate of extent gains, in a few days more extent will also lose the #1 spot.
___________________________________________         
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 #1806 on: November 01, 2020, 03:56:25 PM »
NSIDC Area data - a bit more

The October monthly averages sea ice Area graph attached shows that the October 2020 average of 3,96 million km2 is lowest in the satellite record. It is
- 440k km2 less than 2019,
- 297k km2 less than 2016, and
- 423k km2 less than 2012.

What will happen in November?
« Last Edit: November 01, 2020, 04:03:21 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 #1807 on: November 02, 2020, 04:39:33 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 1st, 2020:
     6,992,188 km2, a double century break increase of 212,659 km2.
     2020 is the lowest on record on this date.
     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 02, 2020, 04:49:38 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 #1808 on: November 02, 2020, 08:23:14 AM »
JAXA ARCTIC SEA ICE EXTENT:  6,992,188 KM2 as at 01-Nov-2020

- Extent gain on this day 213k, 105 k more than the average gain on this day (of the last 10 years) of 108k,
- Extent gain from minimum on this date is 3,437 k, which is 382 k, 10% less than the 10 year average of 3,820 k.

- Extent is at position #1 in the satellite record

- Extent is  680 k LESS than 2019,
- Extent is  42 k LESS than 2016,
- Extent is  748 k LESS than 2012
- Extent is  1,252 k LESS than 2007
- Extent is  1,144 k LESS than the 2010's Average
_____________________________________________
On average 38.6% of extent gains  from minimum to maximum done, and 130 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.08 million km2, 0.80 million km2 below the March 2017 record low maximum of 13.88 million km2.

For the 2020-21 maximum NOT to be a record low, remaining extent gain has to be more than 13.2% above the average remaining extent gain of the last 10 years. This is greater than any of at least the last 13 years.
_______________________________________________________
If daily sea ice extent gain on 2 November is greater than 175k, 2016 sea ice extent becomes lowest in the satellite record. Howver, if daily extent gains gradually moderate over the next few days to something like average for the time of year, 2020 could regain the #1 position.
_______________________________________________________________
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 #1809 on: November 02, 2020, 02:45:23 PM »
NSIDC Total AREA as at 01-Nov-2020 (5 day trailing average) 5,401,981 KM2         
         
Total Area         
 5,401,981    km2      
-1,309,576    km2   <   2010's average.
-691,693    km2   <   2019
-2,320,327    km2   <   2000's average.
         
Total Change    172    k   gain
Peripheral Seas    14    k   gain
Central Seas___    157    k   gain
         
Peripheral Seas         
Okhotsk______    4    k   gain
Bering _______    2    k   gain
Hudson Bay___    2    k   gain
Baffin  Bay____    7    k   gain
St Lawrence___    1    k   gain
Greenland____   -1    k   loss
Barents ______   -1    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    19    k   gain
Beaufort_____    17    k   gain
CAA_________    34    k   gain
East Siberian__    43    k   gain
Central Arctic_    2    k   gain
Laptev_______    23    k   gain
Kara_________    19    k   gain
         
Sea ice area gain on this day 172 k, 43 k more than the 2010's average gain of 129 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 1,310 k less than the 2010's average         
- 2020 Area is 2,320 k less than the 2000's average         
- 2020 Area is 17 k more than 2016         
- 2020 Area is 692 k less than 2019          
- 2020 Area is 1,054 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 01-Nov-2020 (5 day trailing average) 6,691,776 KM2         
         
NSIDC Sea ice EXTENT gain on this day 245 k, 135 k more than the 2010's average gain of 110k         
         
- 2020 EXTENT is at position #1 in the satellite record.         
- 2020 EXTENT is 1,472 k less than the 2010's average         
- 2020 EXTENT is 2,326 k less than the 2000's average         
- 2020 EXTENT is 399 k less than 2016         
- 2020 EXTENT is 924 k less than 2019          
- 2020 EXTENT is 1,092 k less than 2012   
______________________________________
2020 sea ice area no longer lowest. Will the same happen with extent?   
___________________________________________         
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 #1810 on: November 02, 2020, 03:23:22 PM »
NSIDC High Arctic Seas - extent graphs

Firstly, the 2 regions due for completion in the next few days - the CAA and the Beaufort.
"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 #1811 on: November 02, 2020, 03:30:20 PM »
NSIDC High Arctic Seas - extent graphs

Given that 2 seas are nearly out of play, attnetion focuses on the other 5 seas of the High Arctic until freeze gets properly going in the peripheral seas.

The Chukchi, ESS, Laptev and Kara are all showing very strong extent gains dspite relatively high SSTs.
"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 #1812 on: November 02, 2020, 03:37:18 PM »
NSIDC High Arctic Seas - extent graphs

which leaves the Central Arctic - where both extent and area gain have stalled.

area graph also attached
"Para a Causa do Povo a Luta Continua!"
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Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1813 on: November 03, 2020, 04:35:29 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 2nd, 2020:
     7,268,936 km2, a double century break increase of 276,748 km2.
     2020 is now 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 03, 2020, 04:44:36 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 #1814 on: November 03, 2020, 11:47:00 AM »
JAXA ARCTIC SEA ICE EXTENT:  7,268,936 KM2 as at 02-Nov-2020

- Extent gain on this day 277k, 159 k more than the average gain on this day (of the last 10 years) of 118k,
- Extent gain from minimum on this date is 3,714 k, which is 217 k, 6% less than the 10 year average of 3,931 k.

- Extent is at position #2 in the satellite record

- Extent is  535 k LESS than 2019,
- Extent is  102 k MORE than 2016,
- Extent is  559 k LESS than 2012
- Extent is  1,133 k LESS than 2007
- Extent is  985 k LESS than the 2010's Average
_____________________________________________
On average 39.7% of extent gains  from minimum to maximum done, and 129 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.23 million km2, 0.64 million km2 below the March 2017 record low maximum of 13.88 million km2.
_________________________________________________
In the last 5 days extent gain is 1.25 million km2. As a result, for the 2020-21 maximum NOT to be a record low, remaining extent gain has to be a much reduced 10.8% more than the average remaining extent gain of the last 10 years.

This did happen in 3 of the last 10 years. The last 5 days extent gains have brought 2020 extent back into the pack.
_______________________________________________________________
N.B. Click on image to enlarge
"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 #1815 on: November 03, 2020, 06:14:16 PM »
NSIDC Total AREA as at 02-Nov-2020 (5 day trailing average) 5,587,413 KM2         
         
Total Area         
 5,587,413    km2      
-1,253,697    km2   <   2010's average.
-697,839    km2   <   2019
-2,229,534    km2   <   2000's average.
         
Total Change    185    k   gain
Peripheral Seas    11    k   gain
Central Seas___    175    k   gain
         
Peripheral Seas         
Okhotsk______    3    k   gain
Bering _______   -0    k   loss
Hudson Bay___    3    k   gain
Baffin  Bay____    10    k   gain
St Lawrence___    1    k   gain
Greenland____   -6    k   loss
Barents ______   -0    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    17    k   gain
Beaufort_____    14    k   gain
CAA_________    31    k   gain
East Siberian__    50    k   gain
Central Arctic_    11    k   gain
Laptev_______    32    k   gain
Kara_________    20    k   gain
         
Sea ice area gain on this day 185 k, 55 k more than the 2010's average gain of 130 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 1,254 k less than the 2010's average         
- 2020 Area is 2,230 k less than the 2000's average         
- 2020 Area is 136 k more than 2016         
- 2020 Area is 698 k less than 2019          
- 2020 Area is 988 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 02-Nov-2020 (5 day trailing average) 6,943,824 KM2         
         
NSIDC Sea ice EXTENT gain on this day 252 k, 138 k more than the 2010's average gain of 114k         
         
- 2020 EXTENT is at position #1 in the satellite record.         
- 2020 EXTENT is 1,334 k less than the 2010's average         
- 2020 EXTENT is 2,161 k less than the 2000's average         
- 2020 EXTENT is 187 k less than 2016         
- 2020 EXTENT is 839 k less than 2019          
- 2020 EXTENT is 975 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 #1816 on: November 04, 2020, 04:39:20 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 3rd, 2020:
     7,467,492 km2, an almost double century break increase of 198,556 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 04, 2020, 04:50:31 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 #1817 on: November 04, 2020, 09:54:10 AM »
JAXA ARCTIC SEA ICE EXTENT:  7,467,492 KM2 as at 03-Nov-2020

- Extent gain on this day 199k, 86 k more than the average gain on this day (of the last 10 years) of 113k,
- Extent gain from minimum on this date is 3,913 k, which is 124 k, 3% less than the 10 year average of 4,036 k.

- Extent is at position #2 in the satellite record

- Extent is  469 k LESS than 2019,
- Extent is  164 k MORE than 2016,
- Extent is  492 k LESS than 2012
- Extent is  1,074 k LESS than 2007
- Extent is  899 k LESS than the 2010's Average
_____________________________________________
On average 40.8% of extent gains  from minimum to maximum done, and 128 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.32 million km2, 0.56 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
Are daily extent gains going to moderate from now on?
_______________________________________________________________
N.B. Click on image to enlarge
"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 #1818 on: November 04, 2020, 02:21:04 PM »
NSIDC Total AREA as at 03-Nov-2020 (5 day trailing average) 5,786,615 KM2         
         
Total Area         
 5,786,615    km2      
-1,189,701    km2   <   2010's average.
-722,447    km2   <   2019
-2,120,688    km2   <   2000's average.
         
Total Change    199    k   gain
Peripheral Seas    14    k   gain
Central Seas___    185    k   gain
         
Peripheral Seas         
Okhotsk______    3    k   gain
Bering _______   -0    k   loss
Hudson Bay___    3    k   gain
Baffin  Bay____    13    k   gain
St Lawrence___    1    k   gain
Greenland____   -8    k   loss
Barents ______    3    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    16    k   gain
Beaufort_____    10    k   gain
CAA_________    24    k   gain
East Siberian__    56    k   gain
Central Arctic_    17    k   gain
Laptev_______    45    k   gain
Kara_________    17    k   gain
         
Sea ice area gain on this day 199 k, 64 k more than the 2010's average gain of 135 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 1,190 k less than the 2010's average         
- 2020 Area is 2,121 k less than the 2000's average         
- 2020 Area is 242 k more than 2016         
- 2020 Area is 722 k less than 2019          
- 2020 Area is 892 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 03-Nov-2020 (5 day trailing average) 7,202,933 KM2         
         
NSIDC Sea ice EXTENT gain on this day 259 k, 134 k more than the 2010's average gain of 125k         
         
- 2020 EXTENT is at position #1 in the satellite record.         
- 2020 EXTENT is 1,200 k less than the 2010's average         
- 2020 EXTENT is 1,984 k less than the 2000's average         
- 2020 EXTENT is 13 k less than 2016         
- 2020 EXTENT is 750 k less than 2019          
- 2020 EXTENT is 841 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)

BornFromTheVoid

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Re: 2020 Sea ice area and extent data
« Reply #1819 on: November 04, 2020, 03:26:43 PM »
NSIDC extent has now seen the largest single day increase (391k - Nov 1st) and largest 5 day increase (1,325k - Up to Nov 3rd) on record.
I recently joined the twitter thing, where I post more analysis, pics and animations: @Icy_Samuel

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1820 on: November 05, 2020, 05:35:28 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 4th, 2020:
     7,659,839 km2, an almost double century break increase of 192,347 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 05, 2020, 05:48:23 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 #1821 on: November 05, 2020, 11:03:47 AM »
JAXA ARCTIC SEA ICE EXTENT:  7,659,839 KM2 as at 04-Nov-2020

- Extent gain on this day 192k, 96 k more than the average gain on this day (of the last 10 years) of 96k,
- Extent gain from minimum on this date is 4,105 k, which is 22 k, 1% less than the 10 year average of 4,128 k.

- Extent is at position #2 in the satellite record

- Extent is  393 k LESS than 2019,
- Extent is  218 k MORE than 2016,
- Extent is  399 k LESS than 2012
- Extent is  989 k LESS than 2007
- Extent is  803 k LESS than the 2010's Average
_____________________________________________
On average 41.8% of extent gains  from minimum to maximum done, and 127 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.42 million km2, 0.46 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 #1822 on: November 05, 2020, 02:28:47 PM »
NSIDC daily extent at 4 November 7.822 million km2.
NSIDC daily extent at 3 November 7.822 million km2.

This usually means that NSIDC has a problem, usually fixed later in the day or on the following day.

So no post by me yet.
"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)

Stephan

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Re: 2020 Sea ice area and extent data
« Reply #1823 on: November 05, 2020, 10:50:17 PM »
Largest anomaly ever measured

I added the monthly extent value for October 2020 into my long-term plot where I calculate the extent anomalies from 1979 up to now.
The average (1979-2020) October extent is now 7.91 M km². October 2020 had an average extent of 5.29 M km², which is 2.62 M km² less than that long-term average, and more than two sigma below the average (this does not happen frequently).
The belated refreeze in October resulted in a record minimum. Therefore the anomaly from the long-term linear trend line is very large, in fact the largest ever measured, even below the anomaly measured in September 2012. The difference of the actual month from that trend line is -1.37 M km² (calculated from the linear trend line this October should have been at 6.66 M km²).
The slope of the long-term linear trend line has become again steeper by five digits (-0.0560 instead of -0.0555).

See attached graph. Click to enlarge.
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Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1824 on: November 06, 2020, 04:37:48 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 5th, 2020:
     7,787,865 km2, a century break increase of 128,026 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 06, 2020, 04:51:33 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 #1825 on: November 06, 2020, 12:48:19 PM »
NSIDC daily extent at 4 November 7.822 million km2.
NSIDC daily extent at 3 November 7.822 million km2.

This usually means that NSIDC has a problem, usually fixed later in the day or on the following day.

So no post by me yet.
And there was a problem - looks like it's fixed now.

NSIDC User Services, Nov 5, 2020, 13:26 MST:
Hi Matthew,

Thank you for contacting NSIDC. We are working on a technical issue that prevented the daily sea ice data from processing today. We hope to have data processed by the end of the day. Once the data are processed, the sea ice extent maps will update as will the numbers.

I'm sorry for the inconvenience caused by the technical issues.

Best regards,
Lisa

NSIDC User Services

CIRES, 449 UCB

University of Colorado

Boulder, CO 80309-0449, USA

Phone: +1 303-492-6199
Email: nsidc@nsidc.org
URL: https://nsidc.org
Twitter: @NSIDC

National Snow and Ice Data Center * Distributed Active Archive Center
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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1826 on: November 06, 2020, 01:34:37 PM »
JAXA ARCTIC SEA ICE EXTENT:  7,787,865 KM2 as at 05-Nov-2020

- Extent gain on this day 128k, 52 k more than the average gain on this day (of the last 10 years) of 76k,
- Extent gain from minimum on this date is 4,233 k, which is 36 k, 1% more than the 10 year average of 4,197 k.

- Extent is at position #2 in the satellite record

- Extent is  358 k LESS than 2019,
- Extent is  184 k MORE than 2016,
- Extent is  398 k LESS than 2012
- Extent is  952 k LESS than 2007
- Extent is  752 k LESS than the 2010's Average
_____________________________________________
On average 42.5% of extent gains  from minimum to maximum done, and 126 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.47 million km2, 0.41 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
On the 24th October extent gain from minimum was 1,927 k, 1,053 k, 35% less than the 10 year average of 2,979 k.
On this day extent gain from minimum is 4,233 k, 36 k, 1% more than the 10 year average of 4,197 k

_______________________________________________________________
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 #1827 on: November 06, 2020, 03:15:59 PM »
NSIDC Total AREA as at 05-Nov-2020 (5 day trailing average) 6,155,535 KM2         
         
Total Area         
 6,155,535    km2      
-1,088,677    km2   <   2010's average.
-786,871    km2   <   2019
-1,926,401    km2   <   2000's average.
         
Total Change    176    k   gain
Peripheral Seas    14    k   gain
Central Seas___    163    k   gain
         
Peripheral Seas         
Okhotsk______    1    k   gain
Bering _______    3    k   gain
Hudson Bay___    4    k   gain
Baffin  Bay____    10    k   gain
St Lawrence___    1    k   gain
Greenland____   -6    k   loss
Barents ______    1    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    17    k   gain
Beaufort_____    0    k   gain
CAA_________    9    k   gain
East Siberian__    77    k   gain
Central Arctic_   -9    k   loss
Laptev_______    55    k   gain
Kara_________    14    k   gain
         
Sea ice area gain on this day 176 k, 45 k more than the 2010's average gain of 131 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 1,089 k less than the 2010's average         
- 2020 Area is 1,926 k less than the 2000's average         
- 2020 Area is 341 k more than 2016         
- 2020 Area is 787 k less than 2019          
- 2020 Area is 734 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 05-Nov-2020 (5 day trailing average) 7,698,430 KM2         
         
NSIDC Sea ice EXTENT gain on this day 246 k, 137 k more than the 2010's average gain of 109k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 933 k less than the 2010's average         
- 2020 EXTENT is 1,656 k less than the 2000's average         
- 2020 EXTENT is 213 k more than 2016         
- 2020 EXTENT is 565 k less than 2019          
- 2020 EXTENT is 549 k less than 2012
___________________________________________
Extent has lost the #1 position as both extent and area gains remain at very high levels.         
___________________________________________         
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)

BornFromTheVoid

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Re: 2020 Sea ice area and extent data
« Reply #1828 on: November 06, 2020, 03:46:10 PM »
Daily NSIDC extent remains 2nd lowest on record to Nov 5th.
The rapid increases appear to have passed their record breaking peak (peak rate was 265,000 km²/day, current rate is 227,000 km²/day), but are still way above average for the time of year.

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 #1829 on: November 06, 2020, 04:31:15 PM »
And a little table for them that likes numbers
"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 #1830 on: November 06, 2020, 07:54:31 PM »
NSIDC Extent Graphs

with the Beaufort and CAA full up ice, the seas on the Russian side have taken over (apart from the Barents but including the Chukchi).
"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 #1831 on: November 06, 2020, 08:11:26 PM »
The Atlantic Front -

I wonder for how long the Central Arctic region will resist the advance of sea ice to 80 north
I also wonder if the Kara sea ice gains will stall (currently rapidly increasing)
I wonder how ice-free the Barents will be this year.
"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 #1832 on: November 07, 2020, 05:20:51 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 6th, 2020:
     7,863,515 km2, an increase of 75,650 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 07, 2020, 05:36:04 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 #1833 on: November 07, 2020, 10:49:56 AM »
JAXA ARCTIC SEA ICE EXTENT:  7,863,515 KM2 as at 06-Nov-2020

- Extent gain on this day 76k, 9 k more than the average gain on this day (of the last 10 years) of 67k,
- Extent gain from minimum on this date is 4,309 k, which is 44 k, 1% more than the 10 year average of 4,265 k.

- Extent is at position #2 in the satellite record

- Extent is  394 k LESS than 2019,
- Extent is  138 k MORE than 2016,
- Extent is  401 k LESS than 2012
- Extent is  946 k LESS than 2007
- Extent is  743 k LESS than the 2010's Average
_____________________________________________
On average 43.2% of extent gains  from minimum to maximum done, and 125 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.48 million km2, 0.40 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
An extent gain on this day almost down to average and less than the 2019 gain.
_______________________________________________________________
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
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gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1834 on: November 07, 2020, 02:54:07 PM »
NSIDC Total AREA as at 06-Nov-2020 (5 day trailing average) 6,299,137 KM2         
         
Total Area         
 6,299,137    km2      
-1,064,292    km2   <   2010's average.
-832,176    km2   <   2019
-1,856,592    km2   <   2000's average.
         
Total Change    144    k   gain
Peripheral Seas    2    k   gain
Central Seas___    141    k   gain
         
Peripheral Seas         
Okhotsk______   -4    k   loss
Bering _______   -1    k   loss
Hudson Bay___    3    k   gain
Baffin  Bay____    11    k   gain
St Lawrence___    0    k   gain
Greenland____   -7    k   loss
Barents ______    0    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______    13    k   gain
Beaufort_____   -3    k   loss
CAA_________    6    k   gain
East Siberian__    83    k   gain
Central Arctic_   -27    k   loss
Laptev_______    55    k   gain
Kara_________    14    k   gain
         
Sea ice area gain on this day 144 k, 25 k more than the 2010's average gain of 119 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 1,064 k less than the 2010's average         
- 2020 Area is 1,857 k less than the 2000's average         
- 2020 Area is 314 k more than 2016         
- 2020 Area is 832 k less than 2019          
- 2020 Area is 693 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 06-Nov-2020 (5 day trailing average) 7,870,169 KM2         
         
NSIDC Sea ice EXTENT gain on this day 172 k, 72 k more than the 2010's average gain of 100k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 861 k less than the 2010's average         
- 2020 EXTENT is 1,549 k less than the 2000's average         
- 2020 EXTENT is 211 k more than 2016         
- 2020 EXTENT is 532 k less than 2019          
- 2020 EXTENT is 463 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 #1835 on: November 07, 2020, 03:26:43 PM »
Graphs from NSIDC data

The Central Arctic sea ice edge seems very reluctant to advance to 80 North from Svalbard to the North Islands. The Barents refreeze is also currently on hold.

This is in marked contrast to 2019.

"Para a Causa do Povo a Luta Continua!"
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BornFromTheVoid

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Re: 2020 Sea ice area and extent data
« Reply #1836 on: November 07, 2020, 03:51:46 PM »
Daily NSIDC data saw a small drop, -17k, on Nov 6th. It remains 2nd lowest, 105k above 2016.
The centred 5 day mean change is dropping rapidly, but still highest for the time of year.

Meanwhile, the cumulative extent anomaly remains lowest on record up to this point, and is already the 3rd largest annual cumulative anomaly too
I recently joined the twitter thing, where I post more analysis, pics and animations: @Icy_Samuel

Juan C. García

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Re: 2020 Sea ice area and extent data
« Reply #1837 on: November 08, 2020, 04:34:15 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 7th, 2020:
     7,959,495 km2, an increase of 95,980 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 08, 2020, 04:42:21 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 #1838 on: November 08, 2020, 11:01:10 AM »
JAXA ARCTIC SEA ICE EXTENT:  7,959,495 KM2 as at 07-Nov-2020

- Extent gain on this day 96k, 13 k more than the average gain on this day (of the last 10 years) of 83k,
- Extent gain from minimum on this date is 4,405 k, which is 65 k, 2% more than the 10 year average of 4,340 k.

- Extent is at position #2 in the satellite record

- Extent is  404 k LESS than 2019,
- Extent is  118 k MORE than 2016,
- Extent is  350 k LESS than 2012
- Extent is  952 k LESS than 2007
- Extent is  731 k LESS than the 2010's Average
_____________________________________________
On average 44.0% of extent gains  from minimum to maximum done, and 124 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.49 million km2, 0.39 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 #1839 on: November 08, 2020, 02:48:46 PM »
NSIDC Total AREA as at 07-Nov-2020 (5 day trailing average) 6,434,117 KM2         
         
Total Area         
 6,434,117    km2      
-1,031,309    km2   <   2010's average.
-843,316    km2   <   2019
-1,794,450    km2   <   2000's average.
         
Total Change    135    k   gain
Peripheral Seas    10    k   gain
Central Seas___    125    k   gain
         
Peripheral Seas         
Okhotsk______   -3    k   loss
Bering _______   -0    k   loss
Hudson Bay___    4    k   gain
Baffin  Bay____    11    k   gain
St Lawrence___   -1    k   loss
Greenland____   -1    k   loss
Barents ______   -1    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    12    k   gain
Beaufort_____   -3    k   loss
CAA_________    4    k   gain
East Siberian__    86    k   gain
Central Arctic_   -46    k   loss
Laptev_______    51    k   gain
Kara_________    20    k   gain
         
Sea ice area gain on this day 135 k, 33 k more than the 2010's average gain of 102 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 1,031 k less than the 2010's average         
- 2020 Area is 1,794 k less than the 2000's average         
- 2020 Area is 270 k more than 2016         
- 2020 Area is 843 k less than 2019          
- 2020 Area is 658 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 07-Nov-2020 (5 day trailing average) 8,018,745 KM2         
         
NSIDC Sea ice EXTENT gain on this day 149 k, 58 k more than the 2010's average gain of 91k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 803 k less than the 2010's average         
- 2020 EXTENT is 1,463 k less than the 2000's average         
- 2020 EXTENT is 193 k more than 2016         
- 2020 EXTENT is 488 k less than 2019          
- 2020 EXTENT is 409 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 #1840 on: November 09, 2020, 04:34:00 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 8th, 2020:
     8,130,989 km2, a century break increase of 171,494 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 11 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 09, 2020, 04:45:40 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 #1841 on: November 09, 2020, 09:58:21 AM »
JAXA ARCTIC SEA ICE EXTENT:  8,130,989 KM2 as at 08-Nov-2020

- Extent gain on this day 171k, 104 k more than the average gain on this day (of the last 10 years) of 67k,
- Extent gain from minimum on this date is 4,576 k, which is 178 k, 4% more than the 10 year average of 4,398 k.

- Extent is at position #2 in the satellite record

- Extent is  330 k LESS than 2019,
- Extent is  163 k MORE than 2016,
- Extent is  227 k LESS than 2012
- Extent is  892 k LESS than 2007
- Extent is  626 k LESS than the 2010's Average
_____________________________________________
On average 44.6% of extent gains  from minimum to maximum done, and 123 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.59 million km2, 0.28 million km2 below the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
After daily extent gains reduced for a couple of days, on this day extent gain returns to high gear.
_______________________________________________________________
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 #1842 on: November 09, 2020, 02:52:28 PM »
NSIDC Total AREA as at 08-Nov-2020 (5 day trailing average) 6,562,133 KM2         
         
Total Area         
 6,562,133    km2      
-982,552    km2   <   2010's average.
-824,331    km2   <   2019
-1,737,964    km2   <   2000's average.
         
Total Change    128    k   gain
Peripheral Seas    14    k   gain
Central Seas___    114    k   gain
         
Peripheral Seas         
Okhotsk______   -2    k   loss
Bering _______    0    k   gain
Hudson Bay___    6    k   gain
Baffin  Bay____    8    k   gain
St Lawrence___   -0    k   loss
Greenland____    6    k   gain
Barents ______   -3    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    11    k   gain
Beaufort_____   -4    k   loss
CAA_________    2    k   gain
East Siberian__    81    k   gain
Central Arctic_   -44    k   loss
Laptev_______    48    k   gain
Kara_________    20    k   gain
         
Sea ice area gain on this day 128 k, 49 k more than the 2010's average gain of 79 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 983 k less than the 2010's average         
- 2020 Area is 1,738 k less than the 2000's average         
- 2020 Area is 246 k more than 2016         
- 2020 Area is 824 k less than 2019          
- 2020 Area is 613 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 08-Nov-2020 (5 day trailing average) 8,141,512 KM2         
         
NSIDC Sea ice EXTENT gain on this day 123 k, 49 k more than the 2010's average gain of 74k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 755 k less than the 2010's average         
- 2020 EXTENT is 1,404 k less than the 2000's average         
- 2020 EXTENT is 182 k more than 2016         
- 2020 EXTENT is 456 k less than 2019          
- 2020 EXTENT is 377 k less than 2012   
______________________________________
Note the contrast between sea ice gains in the Laptev & ESS compared with the sea ice losses in the Central Arctic.      
___________________________________________         
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 #1843 on: November 09, 2020, 03:07:58 PM »
Graphs from NSIDC Data

Here are the extent and area graphs for the Laptev & ESS.
The Laptev graphs are nothing less than astounding.
"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 #1844 on: November 09, 2020, 03:11:43 PM »
Graphs from NSIDC Data

It's also been quite a year for the Central Arctic - and not yet over.
"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 #1845 on: November 10, 2020, 04:37:03 AM »
Quote
Due to server maintenance, Arctic Data Archive System (ADS) was unable to access website from Nov. 10th 9:30 to 17:30 JST , 2020. We are sorry for the inconvenience this may cause.
https://twitter.com/ADS_NIPR/status/1325976537594654720



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.

aslan

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Re: 2020 Sea ice area and extent data
« Reply #1846 on: November 10, 2020, 12:55:39 PM »
Quote
Due to server maintenance, Arctic Data Archive System (ADS) was unable to access website from Nov. 10th 9:30 to 17:30 JST , 2020. We are sorry for the inconvenience this may cause.
https://twitter.com/ADS_NIPR/status/1325976537594654720



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

Answer is 8.13 km², an increase of 0.17 millions km², second lowest and 0.16 millions km² above 2016.

gerontocrat

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Re: 2020 Sea ice area and extent data
« Reply #1847 on: November 10, 2020, 02:25:40 PM »
Quote
Due to server maintenance, Arctic Data Archive System (ADS) was unable to access website from Nov. 10th 9:30 to 17:30 JST , 2020. We are sorry for the inconvenience this may cause.
https://twitter.com/ADS_NIPR/status/1325976537594654720

https://ads.nipr.ac.jp/vishop/#/extent
Answer is 8.13 km², an increase of 0.17 millions km², second lowest and 0.16 millions km² above 2016.
That's 8th November JAXA data
"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 #1848 on: November 10, 2020, 02:29:11 PM »
NSIDC Total AREA as at 09-Nov-2020 (5 day trailing average) 6,706,852 KM2         
         
Total Area         
 6,706,852    km2      
-902,248    km2   <   2010's average.
-769,974    km2   <   2019
-1,663,348    km2   <   2000's average.
         
Total Change    145    k   gain
Peripheral Seas    23    k   gain
Central Seas___    121    k   gain
         
Peripheral Seas         
Okhotsk______   -3    k   loss
Bering _______   -2    k   loss
Hudson Bay___    8    k   gain
Baffin  Bay____    13    k   gain
St Lawrence___   -0    k   loss
Greenland____    8    k   gain
Barents ______   -0    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    7    k   gain
Beaufort_____   -1    k   loss
CAA_________    3    k   gain
East Siberian__    73    k   gain
Central Arctic_   -24    k   loss
Laptev_______    45    k   gain
Kara_________    19    k   gain
         
Sea ice area gain on this day 145 k, 81 k more than the 2010's average gain of 64 k         
         
- 2020 area is at position #2 in the satellite record.         
- 2020 Area is 902 k less than the 2010's average         
- 2020 Area is 1,663 k less than the 2000's average         
- 2020 Area is 278 k more than 2016         
- 2020 Area is 770 k less than 2019          
- 2020 Area is 507 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 09-Nov-2020 (5 day trailing average) 8,273,295 KM2         
         
NSIDC Sea ice EXTENT gain on this day 132 k, 57 k more than the 2010's average gain of 75k         
         
- 2020 EXTENT is at position #2 in the satellite record.         
- 2020 EXTENT is 698 k less than the 2010's average         
- 2020 EXTENT is 1,333 k less than the 2000's average         
- 2020 EXTENT is 167 k more than 2016         
- 2020 EXTENT is 414 k less than 2019          
- 2020 EXTENT is 328 k less than 2012         
___________________________________________   
The daily above average extent and area gains are remorseless
_________________________________________________       
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 #1849 on: November 10, 2020, 02:42:22 PM »
NSIDC Data

Extent and Area gains really started to take off on the 28th October. Although moderated a bit, they are still way above average for the time of year.
"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)