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gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1300 on: November 07, 2021, 02:50:58 PM »
NSIDC Total AREA as at 06-Nov-2021 (5 day trailing average) 7,267,657 KM2         
         
Total Area         
 7,267,657    km2      
-95,773    km2   <   2010's average.
 919,748    km2   >   2020
 136,344    km2   >   2019
         
Total Change   -19    k   loss
Peripheral Seas    17    k   gain
Central Seas___   -35    k   loss
         
Peripheral Regions         
Okhotsk______    2    k   gain
Bering _______    1    k   gain
Hudson Bay___   -0    k   loss
Baffin  Bay____    8    k   gain
St Lawrence___   -0    k   loss
Greenland____    2    k   gain
Barents ______    3    k   gain
         
Central Arctic  Ocean Regions         
Chukchi______    11    k   gain
Beaufort_____   -4    k   loss
CAA_________    8    k   gain
East Siberian__   -10    k   loss
Central Arctic__   -5    k   loss
Laptev_______   -15    k   loss
Kara_________   -21    k   loss
         
Sea ice area loss on this day 19 k, 142 k less than the last 10 years average gain of 123 k         
         
- Area is at position #7 in the satellite record.         
- Area is 96 k less than the 2010's average         
- Area is 1283 k more than 2016         
- Area is 136 k more than 2019         
- Area is 920 k more than 2020          
- Area is 276 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 06-Nov-2021 (5 day trailing average) 8,706,367 KM2         
         
NSIDC Sea ice EXTENT gain on this day 54 k, 53 k less than the 2010's average gain of 107k         
         
- EXTENT is at position #6 in the satellite record.         
- EXTENT is 24 k less than the 2010's average         
- EXTENT is 1,047 k more than 2016         
- EXTENT is 800 k more than 2019         
- EXTENT is 24 k less than 2020          
- EXTENT is 373 k more than 2012         
         
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)

Stephan

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Re: 2021 Sea ice area and extent data
« Reply #1301 on: November 07, 2021, 04:20:04 PM »
This is the third consecutive day of ice area losses. Shall we open the "2022 melting season" thread?  ;)
It is too late just to be concerned about Climate Change

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1302 on: November 08, 2021, 04:40:05 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 7th, 2021:
     8,757,081 km2, a century break increase of 127,470 km2.
     2021 is now 7th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: November 08, 2021, 05:24:58 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: 2021 Sea ice area and extent data
« Reply #1303 on: November 08, 2021, 09:50:40 AM »
JAXA ARCTIC SEA ICE EXTENT:  8,757,081 KM2 as at 07-Nov-2021

- Extent gain on this day 127k, 49 k more than the average gain on this day (of the last 10 years) of 78k,
- Extent gain from minimum on this date is 4,144 k, which is 271 k, 6.1% less than the 10 year average of 4,415 k.

- Extent is 7th lowest in the 43 year satellite record

- Extent is  798 k MORE than 2020,
- Extent is  63 k MORE than  2018,
- Extent is  105 k MORE than 2017
- Extent is  447 k MORE than 2012
- Extent is  67 k MORE than the 2010's Average
_____________________________________________
On average 43.9% of extent gains  from minimum to maximum done, and 121 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.39 million km2, 0.51 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 10th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1304 on: November 08, 2021, 05:38:09 PM »
NSIDC Total AREA as at 07-Nov-2021 (5 day trailing average) 7,281,638 KM2         
         
Total Area         
 7,281,638    km2      
-183,789    km2   <   2010's average.
 801,567    km2   >   2020
 4,204    km2   >   2019
         
Total Change    14    k   gain
Peripheral Seas    20    k   gain
Central Seas___   -6    k   loss
         
Peripheral Regions         
Okhotsk______    1    k   gain
Bering _______    1    k   gain
Hudson Bay___    2    k   gain
Baffin  Bay____    9    k   gain
St Lawrence___   -0    k   loss
Greenland____    5    k   gain
Barents ______    3    k   gain
         
Central Arctic  Ocean Regions         
Chukchi______    13    k   gain
Beaufort_____   -4    k   loss
CAA_________    1    k   gain
East Siberian__    4    k   gain
Central Arctic__    3    k   gain
Laptev_______   -11    k   loss
Kara_________   -12    k   loss
         
Sea ice area gain on this day 14 k, 91 k less than the last 10 years average gain of 105 k         
         
- Area is at position #6 in the satellite record.         
- Area is 184 k less than the 2010's average         
- Area is 1117 k more than 2016         
- Area is 4 k more than 2019         
- Area is 802 k more than 2020          
- Area is 189 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 07-Nov-2021 (5 day trailing average) 8,753,096 KM2         
         
NSIDC Sea ice EXTENT gain on this day 47 k, 51 k less than the 2010's average gain of 98k         
         
- EXTENT is at position #6 in the satellite record.         
- EXTENT is 69 k less than the 2010's average         
- EXTENT is 927 k more than 2016         
- EXTENT is 706 k more than 2019         
- EXTENT is 69 k less than 2020          
- EXTENT is 325 k more than 2012         
         
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)

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1305 on: November 09, 2021, 04:48:03 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 8th, 2021:
     8,880,466 km2, a century break increase of 123,385 km2.
     2021 is now 8th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1306 on: November 09, 2021, 09:39:10 AM »
JAXA ARCTIC SEA ICE EXTENT:  8,880,466 KM2 as at 08-Nov-2021

- Extent gain on this day 123k, 51 k more than the average gain on this day (of the last 10 years) of 72k,
- Extent gain from minimum on this date is 4,268 k, which is 219 k, 4.9% less than the 10 year average of 4,487 k.

- Extent is 8th lowest in the 43 year satellite record

- Extent is  749 k MORE than 2020,
- Extent is  87 k MORE than  2018,
- Extent is  162 k MORE than 2017
- Extent is  523 k MORE than 2012
- Extent is  123 k MORE than the 2010's Average
_____________________________________________
On average 44.6% of extent gains  from minimum to maximum done, and 120 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.44 million km2, 0.56 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 11th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1307 on: November 09, 2021, 09:14:06 PM »
NSIDC Total AREA as at 08-Nov-2021 (5 day trailing average) 7,358,685 KM2         
         
Total Area         
 7,358,685    km2      
-186,000    km2   <   2010's average.
 749,217    km2   >   2020
-27,780    km2   <   2019
         
Total Change    77    k   gain
Peripheral Seas    30    k   gain
Central Seas___    47    k   gain
         
Peripheral Regions         
Okhotsk______    0    k   gain
Bering _______    2    k   gain
Hudson Bay___    4    k   gain
Baffin  Bay____    13    k   gain
St Lawrence___    0    k   gain
Greenland____    7    k   gain
Barents ______    5    k   gain
         
Central Arctic  Ocean Regions         
Chukchi______    16    k   gain
Beaufort_____    3    k   gain
CAA_________   -0    k   loss
East Siberian__    14    k   gain
Central Arctic__    10    k   gain
Laptev_______   -7    k   loss
Kara_________    12    k   gain
         
Sea ice area gain on this day 77 k, 7 k less than the last 10 years average gain of 84 k         
         
- Area is at position #5 in the satellite record.         
- Area is 186 k less than the 2010's average         
- Area is 1042 k more than 2016         
- Area is 28 k less than 2019         
- Area is 749 k more than 2020          
- Area is 183 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 08-Nov-2021 (5 day trailing average) 8,844,132 KM2         
         
NSIDC Sea ice EXTENT gain on this day 91 k, 10 k more than the 2010's average gain of 81k         
         
- EXTENT is at position #6 in the satellite record.         
- EXTENT is 52 k less than the 2010's average         
- EXTENT is 885 k more than 2016         
- EXTENT is 675 k more than 2019         
- EXTENT is 52 k less than 2020          
- EXTENT is 326 k more than 2012         
         
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: 2021 Sea ice area and extent data
« Reply #1308 on: November 09, 2021, 09:22:58 PM »
from NSIDC Data

The contrast between sea ice extent and area in the Peripheral Arctic regions and the High Arctic is maintained, with the Periphery still lowest in the satellite record (both extent and area) while High Arctic sea ice extnt is 11th lowest and area 8th lowest.

click images 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)

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1309 on: November 10, 2021, 04:46:23 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 9th, 2021:
     8,981,280 km2, a century break increase of 100,814 km2.
     2021 is 8th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1310 on: November 10, 2021, 09:49:49 AM »
JAXA ARCTIC SEA ICE EXTENT:  8,981,280 KM2 as at 09-Nov-2021

- Extent gain on this day 101k, 38 k more than the average gain on this day (of the last 10 years) of 63k,
- Extent gain from minimum on this date is 4,368 k, which is 182 k, 4.0% less than the 10 year average of 4,550 k.

- Extent is 8th lowest in the 43 year satellite record

- Extent is  697 k MORE than 2020,
- Extent is  86 k MORE than  2018,
- Extent is  133 k MORE than 2017
- Extent is  580 k MORE than 2012
- Extent is  168 k MORE than the 2010's Average
_____________________________________________
On average 45.3% of extent gains  from minimum to maximum done, and 119 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.48 million km2, 0.60 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 13th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1311 on: November 10, 2021, 07:02:32 PM »
NSIDC Total AREA as at 09-Nov-2021 (5 day trailing average) 7,480,752 KM2         
         
Total Area         
 7,480,752    km2      
-128,348    km2   <   2010's average.
 721,653    km2   >   2020
 3,926    km2   >   2019
         
Total Change    122    k   gain
Peripheral Seas    31    k   gain
Central Seas___    91    k   gain
         
Peripheral Regions         
Okhotsk______    2    k   gain
Bering _______    1    k   gain
Hudson Bay___    2    k   gain
Baffin  Bay____    14    k   gain
St Lawrence___    0    k   gain
Greenland____    6    k   gain
Barents ______    5    k   gain
         
Central Arctic  Ocean Regions         
Chukchi______    12    k   gain
Beaufort_____    14    k   gain
CAA_________    7    k   gain
East Siberian__    12    k   gain
Central Arctic__    17    k   gain
Laptev_______    0    k   gain
Kara_________    30    k   gain
         
Sea ice area gain on this day 122 k, 51 k more than the last 10 years average gain of 71 k         
         
- Area is at position #6 in the satellite record.         
- Area is 128 k less than the 2010's average         
- Area is 1052 k more than 2016         
- Area is 4 k more than 2019         
- Area is 722 k more than 2020          
- Area is 267 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 09-Nov-2021 (5 day trailing average) 8,953,697 KM2         
         
NSIDC Sea ice EXTENT gain on this day 110 k, 28 k more than the 2010's average gain of 82k         
         
- EXTENT is at position #6 in the satellite record.         
- EXTENT is 18 k less than the 2010's average         
- EXTENT is 847 k more than 2016         
- EXTENT is 652 k more than 2019         
- EXTENT is 18 k less than 2020          
- EXTENT is 352 k more than 2012         
         
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)

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1312 on: November 11, 2021, 05:03:20 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 10th, 2021:
     9,051,451 km2, an increase of 70,171 km2.
     2021 is 8th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1313 on: November 11, 2021, 10:17:29 AM »
JAXA ARCTIC SEA ICE EXTENT:  9,051,451 KM2 as at 10-Nov-2021

- Extent gain on this day 70k, 10 k less than the average gain on this day (of the last 10 years) of 80k,
- Extent gain from minimum on this date is 4,439 k, which is 191 k, 4.1% less than the 10 year average of 4,630 k.

- Extent is 8th lowest in the 43 year satellite record

- Extent is  682 k MORE than 2020,
- Extent is  84 k MORE than  2018,
- Extent is  97 k MORE than 2017
- Extent is  590 k MORE than 2012
- Extent is  159 k MORE than the 2010's Average
_____________________________________________
On average 46.1% of extent gains  from minimum to maximum done, and 118 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.47 million km2, 0.59 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 13th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1314 on: November 11, 2021, 05:47:44 PM »
NSIDC Total AREA as at 10-Nov-2021 (5 day trailing average) 7,631,429 KM2         
         
Total Area         
 7,631,429    km2      
-32,201    km2   <   2010's average.
 728,269    km2   >   2020
 84,267    km2   >   2019
         
Total Change    151    k   gain
Peripheral Seas    37    k   gain
Central Seas___    114    k   gain
         
Peripheral Regions         
Okhotsk______    7    k   gain
Bering _______    1    k   gain
Hudson Bay___    3    k   gain
Baffin  Bay____    17    k   gain
St Lawrence___   -0    k   loss
Greenland____    2    k   gain
Barents ______    7    k   gain
         
Central Arctic  Ocean Regions         
Chukchi______    10    k   gain
Beaufort_____    16    k   gain
CAA_________    14    k   gain
East Siberian__    8    k   gain
Central Arctic__    24    k   gain
Laptev_______    13    k   gain
Kara_________    29    k   gain
         
Sea ice area gain on this day 151 k, 89 k more than the last 10 years average gain of 62 k         
         
- Area is at position #6 in the satellite record.         
- Area is 32 k less than the 2010's average         
- Area is 1124 k more than 2016         
- Area is 84 k more than 2019         
- Area is 728 k more than 2020          
- Area is 394 k more than 2012         
___________________________________________         
NSIDC Total EXTENT as at 10-Nov-2021 (5 day trailing average) 9,090,615 KM2         
         
NSIDC Sea ice EXTENT gain on this day 137 k, 63 k more than the 2010's average gain of 74k         
         
- EXTENT is at position #6 in the satellite record.         
- EXTENT is 48 k more than the 2010's average         
- EXTENT is 881 k more than 2016         
- EXTENT is 682 k more than 2019         
- EXTENT is 48 k more than 2020          
- EXTENT is 415 k more than 2012         
         
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)

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1315 on: November 12, 2021, 05:01:57 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 11th, 2021:
     9,114,805 km2, an increase of 63,354 km2.
     2021 is now 9th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

gerontocrat

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Re: 2021 Sea ice area and extent data
« Reply #1316 on: November 12, 2021, 09:22:22 AM »
JAXA ARCTIC SEA ICE EXTENT:  9,114,805 KM2 as at 11-Nov-2021

- Extent gain on this day 63k, 14 k less than the average gain on this day (of the last 10 years) of 77k,
- Extent gain from minimum on this date is 4,502 k, which is 205 k, 4.4% less than the 10 year average of 4,707 k.

- Extent is 9th lowest in the 43 year satellite record

- Extent is  692 k MORE than 2020,
- Extent is  54 k MORE than  2018,
- Extent is  112 k MORE than 2017
- Extent is  576 k MORE than 2012
- Extent is  143 k MORE than the 2010's Average
_____________________________________________
On average 46.8% of extent gains  from minimum to maximum done, and 117 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.45 million km2, 0.57 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 13th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1317 on: November 13, 2021, 04:43:00 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 12th, 2021:
     9,217,187 km2, a century break increase of 102,382 km2.
     2021 is 9th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1318 on: November 14, 2021, 06:05:27 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 13th, 2021:
     9,334,962 km2, a century break increase of 117,775 km2.
     2021 is now 11th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Stephan

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Re: 2021 Sea ice area and extent data
« Reply #1319 on: November 14, 2021, 11:21:44 AM »
I added the monthly extent value for October 2021 into my long-term plot where I calculate the extent anomalies from 1979 up to now.
The average (1979-2021) October extent is now 7.89 M km². October 2021 had an average extent of 6.77 M km², which is 1.12 M km² less than that long-term average.
This month the value is back again above the long-term linear trend line. The difference of the actual month from that trend line is +0,08 M km² (calculated from the linear trend line this October should have been at 6.69 M km²).
The slope of the long-term linear trend line has stayed stable since August 2021 (-0.0551).

See attached graph. Click to enlarge.
It is too late just to be concerned about Climate Change

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1320 on: November 15, 2021, 05:25:37 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 14th, 2021:
     9,440,514 km2, a century break increase of 105,552 km2.
     2021 is now 13th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

P.S. I hope that you are fine, Gero. We miss you.
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.

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1321 on: November 16, 2021, 04:57:40 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 15th, 2021:
     9,527,384 km2, an increase of 86,870 km2.
     2021 is 13th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

P.S. Hope you're okay, Gero. We will like to hear about you.
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.

Phil.

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Re: 2021 Sea ice area and extent data
« Reply #1322 on: November 16, 2021, 04:45:56 PM »
Not seen any of Gerontocrat's posts recently, I hope he's OK?

passenger66

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Re: 2021 Sea ice area and extent data
« Reply #1323 on: November 17, 2021, 12:50:10 AM »
Was thinking the same, maybe just his dog killed his laptop again.

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1324 on: November 17, 2021, 05:09:31 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 16th, 2021:
     9,649,194 km2, a century break increase of 121,810 km2.
     2021 is now 14th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

coelho

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Re: 2021 Sea ice area and extent data
« Reply #1325 on: November 17, 2021, 07:40:53 PM »
Not seen any of Gerontocrat's posts recently, I hope he's OK?
Last Active: November 16, 2021, 09:49:04 PM per his profile. So, 4 days after his last post he at least logged in.

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1326 on: November 18, 2021, 04:53:34 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 17th, 2021:
     9,730,352 km2, an increase of 81,158 km2.
     2021 is 14th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Shared Humanity

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Re: 2021 Sea ice area and extent data
« Reply #1327 on: November 18, 2021, 04:53:51 PM »
I miss gerontocrat's posts. Is he/she OK?

oren

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Re: 2021 Sea ice area and extent data
« Reply #1328 on: November 18, 2021, 06:55:42 PM »
I have written to him, hope he is okay and hopefully responds.

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1329 on: November 19, 2021, 05:27:40 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 18th, 2021:
     9,796,486 km2, an increase of 66,134 km2.
     2021 is 14th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     2006 without official value, average used.

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

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

Shared Humanity

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Re: 2021 Sea ice area and extent data
« Reply #1330 on: November 19, 2021, 10:48:34 PM »
I have written to him, hope he is okay and hopefully responds.

Thank you.

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1331 on: November 20, 2021, 05:53:35 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 19th, 2021:
     9,868,541 km2, an increase of 72,055 km2.
     2021 is 14th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     2006 without official value, average used.

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

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

be cause

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Re: 2021 Sea ice area and extent data
« Reply #1332 on: November 20, 2021, 12:52:12 PM »
a little good news .. gerontocrat has been taking a well earned break ..  the ' Copout blah blah ' helping drive him away from his computer .
   Thanks for everything you do gero. and I hope to be following yur posts again in the not to distant ... b.c.
2007 + 5 = 2012 + 4 = 2016 + 3 = 2019 + 2 = 2021 + 1 .. it's 2022 !

Shared Humanity

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Re: 2021 Sea ice area and extent data
« Reply #1333 on: November 20, 2021, 05:02:12 PM »
a little good news .. gerontocrat has been taking a well earned break ..  the ' Copout blah blah ' helping drive him away from his computer .
   Thanks for everything you do gero. and I hope to be following yur posts again in the not to distant ... b.c.

Good news. Thank you.

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1334 on: November 20, 2021, 05:29:46 PM »
Well done, Gero.

Hope to have you here in the next melting season (or before that...).
I know that we have this Forum and these subjects in our blood. So it is great to have a break, but the true, we have to come back when the action starts...
« Last Edit: November 20, 2021, 05:37:42 PM 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.

Pagophilus

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Re: 2021 Sea ice area and extent data
« Reply #1335 on: November 21, 2021, 05:02:07 AM »
Wishing you well, Gerontocrat!
With continuing gratitude and admiration,
Pagophilus.

You may delay, but time will not.   Benjamin Franklin.

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1336 on: November 21, 2021, 05:08:59 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 20th, 2021:
     9,913,562 km2, an increase of 45,021 km2.
     2021 is now 13th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1337 on: November 22, 2021, 05:26:21 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 21st, 2021:
     9,988,715 km2, an increase of 75,153 km2.
     2021 is 13th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1338 on: November 23, 2021, 04:43:08 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 22nd, 2021:
     10,065,234 km2, an increase of 76,519 km2.
     2021 is 13th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1339 on: November 24, 2021, 05:11:35 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 23rd, 2021:
     10,117,655 km2, an increase of 52,421 km2.
     2021 is now 11th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1340 on: November 25, 2021, 04:53:50 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 24th, 2021:
     10,151,139 km2, an increase of 33,484 km2.
     2021 is 11th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1341 on: November 26, 2021, 04:51:14 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 25th, 2021:
     10,234,897 km2, an increase of 83,758 km2.
     2021 is now 12th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1342 on: November 27, 2021, 06:04:34 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 26th, 2021:
     10,343,710 km2, a century break increase of 108,813 km2.
     2021 is 12th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Steven

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Re: 2021 Sea ice area and extent data
« Reply #1343 on: November 27, 2021, 04:59:58 PM »
Some regional extent graphs using NSIDC 5-day averages:

- Chukchi and Bering have very high extent, currently even above the 1980s average.
- Kara and Barents rather high compared to recent years.
- Hudson and Baffin are lagging.






Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1344 on: November 28, 2021, 06:44:27 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 27th, 2021:
     10,444,530 km2, a century break increase of 100,820 km2.
     2021 is now 11th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Phil.

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Re: 2021 Sea ice area and extent data
« Reply #1345 on: November 28, 2021, 07:11:11 PM »
Some regional extent graphs using NSIDC 5-day averages:

- Chukchi and Bering have very high extent, currently even above the 1980s average.
- Kara and Barents rather high compared to recent years.
- Hudson and Baffin are lagging.


Hudson in particular appears to be lagging


Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1346 on: November 29, 2021, 04:58:33 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 28th, 2021:
     10,512,002 km2, an increase of 67,472 km2.
     2021 is now 12th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1347 on: November 30, 2021, 05:12:55 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 29th, 2021:
     10,557,711 km2, an increase of 45,709 km2.
     2021 is 12th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1348 on: December 01, 2021, 04:29:24 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 30th, 2021:

Due to server maintenance, Arctic Data Archive System (ADS) will be unable to access website from Nov. 30th 17:00 to Dec. 6th 13:00 JST, 2021.

https://twitter.com/ADS_NIPR/status/1465580684815187975
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.

Juan C. García

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Re: 2021 Sea ice area and extent data
« Reply #1349 on: December 06, 2021, 05:40:23 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

Nov 30th.  10,606,894, an increase of 49,183.
Dec 1st.    10,653,052, an increase of 46,158.
Dec 2nd.   10,718,828, an increase of 65,776.
Dec 3rd.    10,785,797, an increase of 66,969.
Dec 4th.    10,797,115, an increase of 11,318.

December 5th, 2021:
     10,822,172 km2, an increase of 25,057 km2.
     2021 is now 10th lowest on record.
     In the graph are the 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

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

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