Support the Arctic Sea Ice Forum and Blog

Author Topic: 2021 Sea ice area and extent data  (Read 107267 times)

Juan C. García

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #200 on: February 22, 2021, 05:07:44 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

February 21st, 2021:
     13,760,259 km2, an increase of 8,033 km2.
     2021 is 3rd lowest on record.
     In the graph are today's 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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #201 on: February 22, 2021, 09:19:35 AM »
JAXA ARCTIC SEA ICE EXTENT:  13,760,259 KM2 as at 21-Feb-2021

- Extent gain on this day 8k, 26 k less than the average gain on this day (of the last 10 years) of 34k,
- Extent gain from minimum on this date is 10,205 k, which is 559 k, 5.8% more than the 10 year average of 9,646 k.

- Extent is at position #3 in the satellite record

- Extent is  422 k LESS than 2020,
- Extent is  203 k MORE than  2018,
- Extent is  24 k LESS than 2017
- Extent is  397 k LESS than 2013
- Extent is  178 k LESS than the 2010's Average
_____________________________________________
On average 97.9% of extent gains  from minimum to maximum done, and 15 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.99 million km2, 0.10 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #202 on: February 22, 2021, 07:13:38 PM »
NSIDC - for a 2nd day no data

If at the end of the working day tomorrow still no data - I will start to get twitchy.
"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

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #203 on: February 23, 2021, 04:43:06 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

February 22nd, 2021:
     13,754,975 km2, a drop of -5,284 km2.
     2021 is 3rd lowest on record.
     In the graph are today's 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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #204 on: February 23, 2021, 11:19:54 AM »
JAXA ARCTIC SEA ICE EXTENT:  13,754,975 KM2 as at 22-Feb-2021

- Extent loss on this day 5k, 24 k less than the average gain on this day (of the last 10 years) of 19k,
- Extent gain from minimum on this date is 10,200 k, which is 535 k, 5.5% more than the 10 year average of 9,665 k.

- Extent is at position #3 in the satellite record

- Extent is  471 k LESS than 2020,
- Extent is  159 k MORE than  2018,
- Extent is  57 k LESS than 2017
- Extent is  422 k LESS than 2013
- Extent is  204 k LESS than the 2010's Average
_____________________________________________
On average 98.1% of extent gains  from minimum to maximum done, and 14 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.98 million km2, 0.09 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
The current extent maximum of 13.98 million km2 of the 16th Feb is NOT increased from the remaining extent gain in 5 out of the last 10 years.

Turning out to be an unusual 2nd half of February

_______________________________________________________________
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)

Alphabet Hotel

  • Frazil ice
  • Posts: 360
    • View Profile
  • Liked: 134
  • Likes Given: 103
Re: 2021 Sea ice area and extent data
« Reply #205 on: February 23, 2021, 03:39:13 PM »
NSIDC still missing in action. Last update was at 0657 UTC on February 20th.


Jim Hunt

  • Young ice
  • Posts: 4936
  • Stay Home, Save Lives
    • View Profile
    • The Arctic sea ice Great White Con
  • Liked: 541
  • Likes Given: 52
Re: 2021 Sea ice area and extent data
« Reply #206 on: February 23, 2021, 04:15:09 PM »
NSIDC still missing in action.

The data from F17 is flowing again:

https://GreatWhiteCon.info/2021/02/the-2021-maximum-arctic-sea-ice-extent/#Feb-23

And they must be awake in Colorado by now so we shouldn't have long to wait?
Reality is merely an illusion, albeit a very persistent one - Albert Einstein

gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #207 on: February 23, 2021, 07:39:11 PM »
NSIDC still missing in action.

The data from F17 is flowing again:

https://GreatWhiteCon.info/2021/02/the-2021-maximum-arctic-sea-ice-extent/#Feb-23

And they must be awake in Colorado by now so we shouldn't have long to wait?
They are awake - but.....
"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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #208 on: February 23, 2021, 07:58:33 PM »
The images say no data - but there is an update of the spreadsheets.
With some hesitation - here is the update with data to 22nd Feb


NSIDC Total AREA as at 22-Feb-2021 (5 day trailing average) 12,684,891 KM2         
         
Total Area         
 12,684,891    km2      
-59,524    km2   <   2010's average.
-248,525    km2   <   2020
 218,001    km2   >   2017
         
Total Change   -2    k   loss
Peripheral Seas   -5    k   loss
Central Seas___    3    k   gain
         
Peripheral Seas         
Okhotsk______   -9    k   loss
Bering _______    5    k   gain
Hudson Bay___    8    k   gain
Baffin  Bay____    3    k   gain
St Lawrence___   -1    k   loss
Greenland____   -7    k   loss
Barents ______   -5    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    1    k   gain
Beaufort_____    0    k   gain
CAA_________    1    k   gain
East Siberian__    1    k   gain
Central Arctic_   -2    k   loss
Laptev_______   -0    k   loss
Kara_________    2    k   gain
         
Sea ice area loss on this day 2 k, 15 k less than the 2010's average gain of 13 k         
         
- Area is at position #6 in the satellite record.         
- Area is 60 k less than the 2010's average         
- Area is 218 k more than 2017         
- Area is 444 k more than 2016         
- Area is 249 k less than 2020          
- Area is 136 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 22-Feb-2021 (5 day trailing average) 14,069,876 KM2         
         
NSIDC Sea ice EXTENT LOSS on this day 41 k, 58 k less than the 2010's average gain of 17k         
         
- EXTENT is at position #3 in the satellite record.         
- EXTENT is 217 k less than the 2010's average         
- EXTENT is 83 k less than 2017         
- EXTENT is 79 k more than 2016         
- EXTENT is 521 k less than 2020          
- EXTENT is 398 k less than 2012         
___________________________________________         
Note: Click an image for full-size         
« Last Edit: February 24, 2021, 12:15:47 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

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #209 on: February 24, 2021, 04:38:46 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

February 23rd, 2021:
     13,748,553 km2, a drop of -6,422 km2.
     2021 is 3rd lowest on record.
     In the graph are today's 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.

charles_oil

  • Frazil ice
  • Posts: 335
    • View Profile
  • Liked: 37
  • Likes Given: 73
Re: 2021 Sea ice area and extent data
« Reply #210 on: February 24, 2021, 11:16:19 AM »
Gero -
Shouldn't the line [size=0px]NSIDC Sea ice EXTENT[/size][/size][size=0px] gain on this day 41 k, 58 k less than the 2010's average gain of 17k   [/size]


[/size]Read "LOSS on this day" ?
[/size]
[/size]Thanks for your perseverance keeping on top of these elusive numbers!


gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #211 on: February 24, 2021, 12:22:44 PM »
JAXA ARCTIC SEA ICE EXTENT:  13,748,553 KM2 as at 23-Feb-2021

- Extent loss on this day 6k, 19 k less than the average gain on this day (of the last 10 years) of 13k,
- Extent gain from minimum on this date is 10,194 k, which is 516 k, 5.3% more than the 10 year average of 9,678 k.

- Extent is at position #3 in the satellite record

- Extent is  423 k LESS than 2020,
- Extent is  86 k MORE than  2018,
- Extent is  90 k LESS than 2017
- Extent is  481 k LESS than 2013
- Extent is  234 k LESS than the 2010's Average
_____________________________________________
On average 98.2% of extent gains  from minimum to maximum done, and 13 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.99 million km2, 0.10 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #212 on: February 24, 2021, 07:05:02 PM »
There are a couple of days still missing (20&21 Feb) in the NSIDC one day extent reciord. So maybe one or two gltches still to be sorted.

NSIDC Total AREA as at 23-Feb-2021 (5 day trailing average) 12,691,645 KM2         
         
Total Area         
 12,691,645    km2      
-65,903    km2   <   2010's average.
-271,313    km2   <   2020
 200,511    km2   >   2017
         
Total Change    10    k   gain
Peripheral Seas    28    k   gain
Central Seas___   -18    k   loss
         
Peripheral Seas         
Okhotsk______    12    k   gain
Bering _______    14    k   gain
Hudson Bay___   -3    k   loss
Baffin  Bay____    16    k   gain
St Lawrence___    3    k   gain
Greenland____   -11    k   loss
Barents ______   -4    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    3    k   gain
Beaufort_____   -1    k   loss
CAA_________    0    k   gain
East Siberian__   -1    k   loss
Central Arctic_   -23    k   loss
Laptev_______   -1    k   loss
Kara_________    4    k   gain
         
Sea ice area gain on this day 10 k, 3 k less than the 2010's average gain of 13 k         
         
- Area is at position #6 in the satellite record.         
- Area is 66 k less than the 2010's average         
- Area is 201 k more than 2017         
- Area is 441 k more than 2016         
- Area is 271 k less than 2020          
- Area is 140 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 23-Feb-2021 (5 day trailing average) 14,099,985 KM2         
         
NSIDC Sea ice EXTENT gain on this day 19 k, 1 k less than the 2010's average gain of 20k         
         
- EXTENT is at position #3 in the satellite record.         
- EXTENT is 207 k less than the 2010's average         
- EXTENT is 66 k less than 2017         
- EXTENT is 94 k more than 2016         
- EXTENT is 529 k less than 2020          
- EXTENT is 381 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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #213 on: February 24, 2021, 07:21:22 PM »
From NSIDC Data - 3 sea ice AREA graphs)

The Atlantic Front continues to fascinate.
 
- The Central Arctic has lost 100k in sea ice area in 8 days, in that time moving from 15th to 2nd  lowest sea ice area in the satellite record in that time.
- The Greenland Sea has lost nearly 150k in sea ice area in 9 days, in that time moving from 21st to 3rd lowest sea ice area in the satellite record in that time.

On the other hand, the Barents sea gained over 200k in sea ice area from the 1st to the 16th of February, moving from 14th to 27th lowest in that time. Since then sea ice loss is just less than 20k, and the Barents sea ice area is still 25th lowest in the satellite.

How much is melt and freeze and how much is increased mobility is a question I cannot answer.
"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

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #214 on: February 25, 2021, 04:45:56 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

February 24th, 2021:
     13,701,350 km2, a drop of -47,203 km2.
     2021 is now 2nd lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)

P.S. 277K km2 lost since Feb 16th.
      Is it time to declare the start of 2021 melting season?  :o

Source: https://ads.nipr.ac.jp/vishop/#/extent.
« Last Edit: February 25, 2021, 04:53:35 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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #215 on: February 25, 2021, 07:13:43 AM »
JAXA ARCTIC SEA ICE EXTENT:  13,701,350 KM2 as at 24-Feb-2021

- Extent loss on this day 47k, 55 k less than the average gain on this day (of the last 10 years) of 8k,
- Extent gain from minimum on this date is 10,147 k, which is 460 k, 4.7% more than the 10 year average of 9,687 k.

- Extent is at position #2 in the satellite record

- Extent is  396 k LESS than 2020,
- Extent is  58 k MORE than  2018,
- Extent is  106 k LESS than 2017
- Extent is  645 k LESS than 2013
- Extent is  298 k LESS than the 2010's Average
_____________________________________________
On average 98.3% of extent gains  from minimum to maximum done, and 12 days to maximum

Projections. (Table JAXA-Arc1)

Today's extent loss means that now 7 out of the last 10 years remaining extent gains are insufficient to increase 2021 extent above the current maximum of 13.98 million km2 of the 16th February.

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 13.98 million km2, 0.09 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #216 on: February 25, 2021, 05:11:02 PM »
NSIDC Total AREA as at 24-Feb-2021 (5 day trailing average) 12,671,993 KM2         
         
Total Area         
 12,671,993    km2      
-94,531    km2   <   2010's average.
-320,570    km2   <   2020
 168,602    km2   >   2017
         
Total Change   -20    k   loss
Peripheral Seas   -9    k   loss
Central Seas___   -11    k   loss
         
Peripheral Seas         
Okhotsk______    11    k   gain
Bering _______    14    k   gain
Hudson Bay___   -4    k   loss
Baffin  Bay____    9    k   gain
St Lawrence___   -0    k   loss
Greenland____   -5    k   loss
Barents ______   -35    k   loss
         
Central Arctic  Ocean Seas         
Chukchi______    3    k   gain
Beaufort_____   -1    k   loss
CAA_________   -1    k   loss
East Siberian__    1    k   gain
Central Arctic_   -12    k   loss
Laptev_______   -1    k   loss
Kara_________    1    k   gain
         
Sea ice area loss on this day 20 k, 29 k less than the 2010's average gain of 9 k         
         
- Area is at position #6 in the satellite record.         
- Area is 95 k less than the 2010's average         
- Area is 169 k more than 2017         
- Area is 401 k more than 2016         
- Area is 321 k less than 2020          
- Area is 175 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 24-Feb-2021 (5 day trailing average) 14,089,815 KM2         
         
NSIDC Sea ice EXTENT loss on this day 10 k, 25 k less than the 2010's average gain of 15k         
         
- EXTENT is at position #3 in the satellite record.         
- EXTENT is 232 k less than the 2010's average         
- EXTENT is 88 k less than 2017         
- EXTENT is 65 k more than 2016         
- EXTENT is 562 k less than 2020          
- EXTENT is 411 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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #217 on: February 25, 2021, 05:30:37 PM »
From NSIDC Data - 4 sea ice AREA graphs

The Atlantic Front continues to fascinate.
 
The Central Arctic, the Greenland Sea and the Barents sea continue to lose sea ice area.
How much is melt and freeze and how much is increased mobility is a question I cannot answer. It will be interesting to see what the PIOMAS model makes of it.

meanwhile - at the Pacific gateway, the Bering and the Chukchi gain sea ice area. Indeed the Chukchi has made a bit of a record. Chukchi sea ice area on this day, the 24th February, is 43rd lowest in the satellite record. i.e. HIGHEST in the satellite record.

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)

kassy

  • Young ice
  • Posts: 3155
    • View Profile
  • Liked: 1284
  • Likes Given: 1205
Re: 2021 Sea ice area and extent data
« Reply #218 on: February 25, 2021, 10:35:44 PM »
But the one later blip is 2019-2020. Let´s see if it crashes like that year later on (i bet it will).
Þetta minnismerki er til vitnis um að við vitum hvað er að gerast og hvað þarf að gera. Aðeins þú veist hvort við gerðum eitthvað.

Juan C. García

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #219 on: February 26, 2021, 04:49:22 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

February 25th, 2021:
     13,671,553 km2, a drop of -29,797 km2.
     2021 is 2nd lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     Now 307K km2 lost since Feb 16th.

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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #220 on: February 26, 2021, 06:25:04 AM »
JAXA ARCTIC SEA ICE EXTENT:  13,671,553 KM2 as at 25-Feb-2021

- Extent loss on this day 30k, 37 k less than the average gain on this day (of the last 10 years) of 7k,

- Extent is at position #2 in the satellite record

- Extent is  411 k LESS than 2020,
- Extent is  33 k MORE than  2018,
- Extent is  101 k LESS than 2017
- Extent is  758 k LESS than 2013
- Extent is  329 k LESS than the 2010's Average
_____________________________________________

Projections. (Table JAXA-Arc1)

It is difficult not to believe that the 2021 maximum has passed - at 13.98 million on the 16th Feb. But in three of the last 10 years, including last year, remaining extent gain was enough to increase extent to a new maximum.
_______________________________________________________________
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

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #221 on: February 27, 2021, 04:43:12 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

February 26th, 2021:
     13,733,361 km2, an increase of 61,808 km2.
     2021 is 2nd lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     245K km2 lost since Feb 16th.

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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #222 on: February 27, 2021, 11:14:46 AM »
JAXA ARCTIC SEA ICE EXTENT:  13,733,361 KM2 as at 26-Feb-2021

- Extent gain on this day 62k, 41 k more than the average gain on this day (of the last 10 years) of 21k,
- Extent gain from minimum on this date is 10,179 k, which is 464 k, 4.8% more than the 10 year average of 9,714 k.

- Extent is at position #2 in the satellite record

- Extent is  435 k LESS than 2020,
- Extent is  57 k MORE than  2018,
- Extent is  30 k LESS than 2017
- Extent is  735 k LESS than 2013
- Extent is  278 k LESS than the 2010's Average
_____________________________________________
On average 98.6% of extent gains  from minimum to maximum done, and 10 days to maximum

Projections. (Table JAXA-Arc1)

It is difficult not to believe that the 2021 maximum has passed - at 13.98 million on the 16th Feb.

But in 4 of the last 10 years, including last year, remaining extent gain was enough to increase extent to a new maximum, and maybe there is a switch in the weather that now favours extent gains.
_______________________________________________________________
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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #223 on: February 27, 2021, 07:52:27 PM »
NSIDC data still in error.

No new update of data files today

Goodnight
"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

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #224 on: February 28, 2021, 05:24:47 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

February 27th, 2021:
     13,841,660 km2, a century break increase of 108,299 km2;)
     2021 is now 4th lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     137K km2 lost since Feb 16th.

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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #225 on: February 28, 2021, 12:52:15 PM »
JAXA ARCTIC SEA ICE EXTENT:  13,841,660 KM2 as at 27-Feb-2021

- Extent gain on this day 108k, 108 k more than the average gain on this day (of the last 10 years) of 0k,
- Extent gain from minimum on this date is 10,287 k, which is 572 k, 5.9% more than the 10 year average of 9,715 k.

- Extent is at position #4 in the satellite record

- Extent is  454 k LESS than 2020,
- Extent is  160 k MORE than  2018,
- Extent is  123 k MORE than 2017
- Extent is  633 k LESS than 2013
- Extent is  156 k LESS than the 2010's Average
_____________________________________________
On average 98.6% of extent gains  from minimum to maximum done, and 9 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.04 million km2, 0.15 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
It WAS difficult not to believe that the 2021 maximum has passed - at 13.98 million on the 16th Feb.

But what a difference a day makes.

Now in 7 of the last 10 years, including last year, remaining extent gain was enough to increase extent to a new maximum, and maybe the switch in the weather that now favours extent gains will continue.
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

Juan C. García

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #226 on: March 01, 2021, 05:00:13 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

February 28th, 2021:
     13,942,270 km2, a 2nd century break increase, now of 100,610 km2;)
     2021 is 7th lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     It needs only 37K km2 to make a new 2021 max.

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

  • Frazil ice
  • Posts: 448
    • View Profile
  • Liked: 193
  • Likes Given: 19
Re: 2021 Sea ice area and extent data
« Reply #227 on: March 01, 2021, 05:01:28 AM »
This is fun to watch.

gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #228 on: March 01, 2021, 08:58:57 AM »
JAXA ARCTIC SEA ICE EXTENT:  13,942,270 KM2 as at 28-Feb-2021

- Extent gain on this day 101k, 80 k more than the average gain on this day (of the last 10 years) of 21k,
- Extent gain from minimum on this date is 10,387 k, which is 652 k, 6.7% more than the 10 year average of 9,735 k.

- Extent is at position #7 in the satellite record

- Extent is  406 k LESS than 2020,
- Extent is  214 k MORE than  2018,
- Extent is  192 k MORE than 2017
- Extent is  563 k LESS than 2013
- Extent is  75 k LESS than the 2010's Average
_____________________________________________
On average 98.8% of extent gains  from minimum to maximum done, and 8 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.12 million km2, 0.23 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
Two days of 100k+ extent gains and extent increases from 2nd to 7th lowest in the satellite record.
A further 37k extent gain gives a new maximum extent for the year

_______________________________________________________________
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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #229 on: March 01, 2021, 09:06:54 AM »
from JAXA Data - a bit more

I attach the monthly average graph for February. At 13.78 million km2, the Feb '21 average was 220k less than Feb '20 and 5th lowest in the satellite record. It was also 198k more than the linear trend value.

I also attach the estimated March monthly average graph assuming average daily extent gains.

click 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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #230 on: March 01, 2021, 07:01:19 PM »
NSIDC

Today(1 March) at 15.33 GMT NSIDC posted another set of graphs. Unfortunately the data is the same as in the update on 26 Feb.

So it ain't fixed. It's been a very long time since we've had such a long unscheduled pitstop.

ps: Does not PIOMAS depend on the NSIDC area analysis as the main data input into the algorithm?
"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)

Alphabet Hotel

  • Frazil ice
  • Posts: 360
    • View Profile
  • Liked: 134
  • Likes Given: 103
Re: 2021 Sea ice area and extent data
« Reply #231 on: March 01, 2021, 08:52:09 PM »
re: NSIDC

Something is very wrong there. The latest daily extent data (uploaded this morning) stops at the 21st after skipping the 20th. And the data for the 21st comes from one day in the future!?? (All the other days have the previous day's date in the file name.)

2021,    02,  21,     13.154,      1.263, ['/ecs/DP1/PM/NSIDC-0081.001/2021.02.22/nt_20210222_f18_nrt_n.bin']

Juan C. García

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #232 on: March 02, 2021, 04:57:59 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

March 1st, 2021:
     14,039,075 km2, almost a century break increase of 96,805 km2.
     2021 is now 8th lowest on record.
     In the graph are today's 15 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     This is a new 2021 max!

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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #233 on: March 02, 2021, 08:16:22 AM »
JAXA ARCTIC SEA ICE EXTENT:  14,039,075 KM2 as at 01-Mar-2021

- Extent gain on this day 97k, 62 k more than the average gain on this day (of the last 10 years) of 35k,
- Extent gain from minimum on this date is 10,484 k, which is 714 k, 7.3% more than the 10 year average of 9,770 k.

- Extent is at position #8 in the satellite record

- Extent is  347 k LESS than 2020,
- Extent is  279 k MORE than  2018,
- Extent is  237 k MORE than 2017
- Extent is  474 k LESS than 2013
- Extent is  14 k LESS than the 2010's Average
_____________________________________________
On average 99.2% of extent gains  from minimum to maximum done, and 7 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.18 million km2, 0.29 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
And after all that, a new maximum, some 60k above the previous one on the 16th Feb.
_______________________________________________________________
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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #234 on: March 02, 2021, 10:07:53 PM »
No NSIDC data Feb 20 to March 1 is a long time.

I've emailed them (very politely) to see if they are willing to tell the world a bit more of what is going on and the prospects for data recovery.
« Last Edit: March 02, 2021, 10:27:51 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

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #235 on: March 03, 2021, 04:44:59 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

March 2nd, 2021:
     14,059,161 km2, an increase of 20,086 km2.
     2021 is 8th lowest on record.
     In the graph are today's 16 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     This is a new 2021 max.

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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #236 on: March 03, 2021, 10:29:35 AM »
JAXA ARCTIC SEA ICE EXTENT:  14,059,161 KM2 as at 02-Mar-2021

- Extent gain on this day 20k, 13 k more than the average gain on this day (of the last 10 years) of 7k,
- Extent gain from minimum on this date is 10,504 k, which is 727 k, 7.4% more than the 10 year average of 9,777 k.

- Extent is at position #8 in the satellite record

- Extent is  353 k LESS than 2020,
- Extent is  322 k MORE than  2018,
- Extent is  271 k MORE than 2017
- Extent is  427 k LESS than 2013
- Extent is  5 k LESS than the 2010's Average
_____________________________________________
On average 99.4% of extent gains  from minimum to maximum done, and 6 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.19 million km2, 0.30 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #237 on: March 03, 2021, 08:40:55 PM »
Message from NSIDC

NSIDC User Services, Mar 3, 2021, 11:05 MST:
Dear Matthew,

Thank you for contacting NSIDC. We continue to investigate errors in our sea ice processing, and we making some software upgrades to address the errors. We will post new data as soon as the software upgrades are implemented. At this time, I don't have an estimate on when we'll have new data, but I am hopeful it will be soon. We will be updating the message on the site shortly.

Best regards,
Lisa

NSIDC User Services

CIRES, 449 UCB

University of Colorado

Boulder, CO 80309-0449, USA
"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

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #238 on: March 04, 2021, 04:47:31 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

March 3rd, 2021:
     14,087,832 km2, an increase of 28,671 km2.
     2021 is 8th lowest on record.
     In the graph are today's 17 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     This is a new 2021 max.

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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #239 on: March 04, 2021, 11:09:13 AM »
JAXA ARCTIC SEA ICE EXTENT:  14,087,832 KM2 as at 03-Mar-2021

- Extent gain on this day 29k, 24 k more than the average gain on this day (of the last 10 years) of 5k,
- Extent gain from minimum on this date is 10,533 k, which is 752 k, 7.7% more than the 10 year average of 9,781 k.

- Extent is at position #8 in the satellite record

- Extent is  360 k LESS than 2020,
- Extent is  358 k MORE than  2018,
- Extent is  274 k MORE than 2017
- Extent is  326 k LESS than 2013
- Extent is  16 k MORE than the 2010's Average
_____________________________________________
On average 99.5% of extent gains  from minimum to maximum done, and 5 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.20 million km2, 0.31 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

Juan C. García

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #240 on: March 05, 2021, 05:11:06 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

March 4th, 2021:
     14,124,139 km2, an increase of 36,307 km2.
     2021 is now 9th lowest on record.
     In the graph are today's 18 lowest years on the range 2000-2021 (excludes 1999).
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     This is a new 2021 max.

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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #241 on: March 05, 2021, 08:03:23 AM »
JAXA ARCTIC SEA ICE EXTENT:  14,124,139 KM2 as at 04-Mar-2021

- Extent gain on this day 36k, 46 k more than the average loss on this day (of the last 10 years) of 10k,
- Extent gain from minimum on this date is 10,569 k, which is 798 k, 8.2% more than the 10 year average of 9,771 k.

- Extent is at position #9 in the satellite record

- Extent is  312 k LESS than 2020,
- Extent is  433 k MORE than  2018,
- Extent is  295 k MORE than 2017
- Extent is  576 k LESS than 2012
- Extent is  55 k MORE than the 2010's Average
_____________________________________________
On average 99.5% of extent gains  from minimum to maximum done, and 4 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.24 million km2, 0.34 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

Stephan

  • Nilas ice
  • Posts: 1575
    • View Profile
  • Liked: 556
  • Likes Given: 263
Re: 2021 Sea ice area and extent data
« Reply #242 on: March 05, 2021, 04:52:58 PM »
Is a monthly average for Feb2021 of NSIDC area and extent already available?
It is too late just to be concerned about Climate Change

gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #243 on: March 05, 2021, 06:24:43 PM »
Is a monthly average for Feb2021 of NSIDC area and extent already available?
My graphs (and theirs) depend on NSIDC.org Feb data being available. Still not fixed since Feb 19.
"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

  • Nilas ice
  • Posts: 1575
    • View Profile
  • Liked: 556
  • Likes Given: 263
Re: 2021 Sea ice area and extent data
« Reply #244 on: March 05, 2021, 08:47:05 PM »
My graphs (and theirs) depend on NSIDC.org Feb data being available. Still not fixed since Feb 19.
This is almost two weeks ago. The problem they have seems to be really serious !?!
It is too late just to be concerned about Climate Change

Juan C. García

  • Nilas ice
  • Posts: 2263
    • View Profile
  • Liked: 1090
  • Likes Given: 781
Re: 2021 Sea ice area and extent data
« Reply #245 on: March 06, 2021, 05:17:42 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

March 5th, 2021:
     14,135,332 km2, an increase of 11,193 km2.
     2021 is now 8th lowest on record.
     In the graph are today's 17 lowest years.
     Highlighted 2010's average, 2021 and the 5 years with daily lowest minimum:
          (2012, 2020, 2019, 2016 & 2007)
     This is a new 2021 max.

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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #246 on: March 06, 2021, 09:31:28 AM »
JAXA ARCTIC SEA ICE EXTENT:  14,135,332 KM2 as at 05-Mar-2021

- Extent gain on this day 11k, 21 k more than the average loss on this day (of the last 10 years) of 10k,
- Extent gain from minimum on this date is 10,581 k, which is 819 k, 8.4% more than the 10 year average of 9,761 k.

- Extent is at position #8 in the satellite record

- Extent is  260 k LESS than 2020,
- Extent is  505 k MORE than  2018,
- Extent is  277 k MORE than 2017
- Extent is  506 k LESS than 2012
- Extent is  63 k MORE than the 2010's Average
_____________________________________________
On average 99.5% of extent gains  from minimum to maximum done, and 3 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2021 of 14.25 million km2, 0.36 million km2 above the March 2017 record low maximum of 13.88 million km2.
_______________________________________________________________
N.B. Click on image to enlarge
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #247 on: March 06, 2021, 10:14:18 AM »
NSIDC has returned? tho' 20 & 21 Feb data may be casualties
"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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #248 on: March 06, 2021, 11:12:49 AM »
From the repaired NSIDC data...

NSIDC Total AREA as at 04-Mar-2021 (5 day trailing average) 12,803,386 KM2         
         
Total Area         
 12,803,386    km2      
-30,780    km2   <   2010's average.
-496,445    km2   <   2020
 235,366    km2   >   2017
         
Total Change    30    k   gain
Peripheral Seas    35    k   gain
Central Seas___   -5    k   loss
         
Peripheral Seas         
Okhotsk______    20    k   gain
Bering _______    5    k   gain
Hudson Bay___   -2    k   loss
Baffin  Bay____   -11    k   loss
St Lawrence___    3    k   gain
Greenland____    10    k   gain
Barents ______    8    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______   -2    k   loss
Beaufort_____    0    k   gain
CAA_________   -0    k   loss
East Siberian__   -2    k   loss
Central Arctic_    8    k   gain
Laptev_______    2    k   gain
Kara_________   -10    k   loss
         
Sea ice area gain on this day 30 k, 9 k more than the 2010's average gain of 21 k         
         
- Area is at position #8 in the satellite record.         
- Area is 31 k less than the 2010's average         
- Area is 235 k more than 2017         
- Area is 377 k more than 2016         
- Area is 496 k less than 2020          
- Area is 502 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 04-Mar-2021 (5 day trailing average) 14,506,877 KM2         
         
NSIDC Sea ice EXTENT gain on this day 88 k, 71 k more than the 2010's average gain of 17k         
         
- EXTENT is at position #8 in the satellite record.         
- EXTENT is 56 k more than the 2010's average         
- EXTENT is 281 k more than 2017         
- EXTENT is 265 k more than 2016         
- EXTENT is 368 k less than 2020          
- EXTENT is 457 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

  • Multi-year ice
  • Posts: 10925
    • View Profile
  • Liked: 4039
  • Likes Given: 31
Re: 2021 Sea ice area and extent data
« Reply #249 on: March 06, 2021, 04:35:35 PM »
And another update from NSIDC gets us up-to-date.

NSIDC Total AREA as at 05-Mar-2021 (5 day trailing average) 12,820,017 KM2         
         
Total Area         
 12,820,017    km2      
-35,952    km2   <   2010's average.
-519,063    km2   <   2020
 191,896    km2   >   2017
         
Total Change    17    k   gain
Peripheral Seas    24    k   gain
Central Seas___   -8    k   loss
         
Peripheral Seas         
Okhotsk______    24    k   gain
Bering _______    3    k   gain
Hudson Bay___   -4    k   loss
Baffin  Bay____   -18    k   loss
St Lawrence___    1    k   gain
Greenland____    6    k   gain
Barents ______    12    k   gain
         
Central Arctic  Ocean Seas         
Chukchi______   -6    k   loss
Beaufort_____   -2    k   loss
CAA_________   -1    k   loss
East Siberian__   -4    k   loss
Central Arctic_    8    k   gain
Laptev_______    2    k   gain
Kara_________   -5    k   loss
         
Sea ice area gain on this day 17 k, 2 k less than the Last 10 years average gain of 19 k         
         
- Area is at position #7 in the satellite record.         
- Area is 36 k less than the 2010's average         
- Area is 192 k more than 2017         
- Area is 397 k more than 2016         
- Area is 519 k less than 2020          
- Area is 540 k less than 2012         
___________________________________________         
NSIDC Total EXTENT as at 05-Mar-2021 (5 day trailing average) 14,546,283 KM2         
         
NSIDC Sea ice EXTENT gain on this day 39 k, 33 k more than the 2010's average gain of 6k
         
- EXTENT is at position #9 in the satellite record.         
- EXTENT is 84 k more than the 2010's average         
- EXTENT is 298 k more than 2017         
- EXTENT is 334 k more than 2016         
- EXTENT is 338 k less than 2020          
- EXTENT is 470 k less than 2012         
___________________________________________         
Note: Click an image for full-size         
« Last Edit: March 06, 2021, 04:42:45 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)