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Author Topic: Sea Ice Extent around Antarctica  (Read 431602 times)

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #1700 on: February 27, 2021, 11:22:18 AM »
JAXA ANTARCTIC SEA ICE EXTENT:  3,016,350 KM2 as at 26-Feb-2021

- Extent gain on this day 116k, 96 k more than the average gain on this day (of the last 10 years) of 20k,
- Extent gain from minimum on this date is 0.23 million km2, 0.12 million km2, (118.4%) more than the 10 year average of 0.10 million km2.
- Extent is at position #28 in the satellite record of which 15 lower values are in the years before 2000

- Extent is  713 k LESS than 2015
- Extent is  856 k MORE than 2017
- Extent is  494 k MORE than 2006
- Extent is  204 k MORE than 2020
- Extent is  158 k MORE than the 1980's Average

- On average  1.4% of ice gain from minimum to maximum done, and 206 days to maximum

Projections. (Table JAXA-Ant1)

Average remaining freeze (of the last 10 years) would produce a maximum in Sept 2020 of 18.89 million km2, 0.83 million km2 above the 2017 record low maximum of 18.06 million km2.
___________________________________________________________
N.B. Click on image  for full-size
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #1701 on: February 28, 2021, 01:15:55 PM »
JAXA ANTARCTIC SEA ICE EXTENT:  3,092,800 KM2 as at 27-Feb-2021

- Extent gain on this day 76k, 53 k more than the average gain on this day (of the last 10 years) of 23k,
- Extent gain from minimum on this date is 0.31 million km2, 0.18 million km2, (139.2%) more than the 10 year average of 0.13 million km2.
- Extent is at position #30 in the satellite record of which 17 lower values are in the years before 2000

- Extent is  679 k LESS than 2015
- Extent is  940 k MORE than 2017
- Extent is  543 k MORE than 2006
- Extent is  284 k MORE than 2020
- Extent is  203 k MORE than the 1980's Average

- On average  1.9% of ice gain from minimum to maximum done, and 205 days to maximum

Projections. (Table JAXA-Ant1)

Average remaining freeze (of the last 10 years) would produce a maximum in Sept 2020 of 18.95 million km2, 0.88 million km2 above the 2017 record low maximum of 18.06 million km2.
___________________________________________________________
In the last 3 days daily extent gain has been well above average, with the result that extent has moved from 19th lowest to 30th lowest in the satellite record in those 3 days.
___________________________________________________________
N.B. Click on image  for full-size
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #1702 on: March 01, 2021, 09:34:37 AM »
JAXA ANTARCTIC SEA ICE EXTENT:  3,197,871 KM2 as at 28-Feb-2021

- Extent gain on this day 105k, 84 k more than the average gain on this day (of the last 10 years) of 21k,
- Extent gain from minimum on this date is 0.41 million km2, 0.26 million km2, (175.3%) more than the 10 year average of 0.15 million km2.
- Extent is at position #33 in the satellite record of which 19 lower values are in the years before 2000

- Extent is  603 k LESS than 2015
- Extent is  1,046 k MORE than 2017
- Extent is  634 k MORE than 2006
- Extent is  412 k MORE than 2020
- Extent is  270 k MORE than the 1980's Average

- On average  2.6% of ice gain from minimum to maximum done, and 204 days to maximum

Projections. (Table JAXA-Ant1)

Average remaining freeze (of the last 10 years) would produce a maximum in Sept 2020 of 19.03 million km2, 0.97 million km2 above the 2017 record low maximum of 18.06 million km2.
___________________________________________________________
In the last 4 days daily extent gain has been well above average, with the result that extent has moved from 19th lowest to 33rd lowest in the satellite record in those 4 days.
___________________________________________________________
N.B. Click on image  for full-size
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #1703 on: March 01, 2021, 10:23:28 AM »
JAXA Data - a bit more

The Feb monthly average graph is attached. At 3.00 million km2, the Feb 21 average is just 83k below the (meaningless) linear trend, and just 40k below the simple monthly average from 1979 to 2021.

I also attach the 365 day trailing average graph and table. In February, the average briefly flirted with a daily reduction, but is now heading back up. It is currently just 47k less than the simple average of daily extents from 1979 to 2021.

Click on image  for full-size
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #1704 on: March 02, 2021, 08:26:11 AM »
JAXA ANTARCTIC SEA ICE EXTENT:  3,336,462 KM2 as at 01-Mar-2021

- Extent gain on this day 139k, 114 k more than the average gain on this day (of the last 10 years) of 25k,
- Extent gain from minimum on this date is 0.55 million km2, 0.37 million km2, (214.9%) more than the 10 year average of 0.17 million km2.
- Extent is at position #33 in the satellite record of which 19 lower values are in the years before 2000

- Extent is  471 k LESS than 2015
- Extent is  1,189 k MORE than 2017
- Extent is  780 k MORE than 2006
- Extent is  556 k MORE than 2020
- Extent is  356 k MORE than the 1980's Average

- On average  3.4% of ice gain from minimum to maximum done, and 203 days to maximum

Projections. (Table JAXA-Ant1)

Average remaining freeze (of the last 10 years) would produce a maximum in Sept 2020 of 19.14 million km2, 1.08 million km2 above the 2017 record low maximum of 18.06 million km2.
___________________________________________________________
Click on image  for full-size
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #1705 on: March 03, 2021, 10:51:26 AM »
JAXA ANTARCTIC SEA ICE EXTENT:  3,474,391 KM2 as at 02-Mar-2021

- Extent gain on this day 138k, 105 k more than the average gain on this day (of the last 10 years) of 33k,
- Extent gain from minimum on this date is 0.69 million km2, 0.48 million km2, (230.6%) more than the 10 year average of 0.21 million km2.
- Extent is at position #34 in the satellite record of which 19 lower values are in the years before 2000

- Extent is  329 k LESS than 2015
- Extent is  1,325 k MORE than 2017
- Extent is  944 k MORE than 2006
- Extent is  657 k MORE than 2020
- Extent is  440 k MORE than the 1980's Average

- On average  4.3% of ice gain from minimum to maximum done, and 202 days to maximum

Projections. (Table JAXA-Ant1)

Average remaining freeze (of the last 10 years) would produce a maximum in Sept 2020 of 19.25 million km2, 1.18 million km2 above the 2017 record low maximum of 18.06 million km2.
___________________________________________________________
In the last 5 days daily extent gain has been impressively above average, with the result that extent has moved from 19th lowest to 34th lowest (10th highest) in the satellite record in those 5 days.
___________________________________________________________
Click on 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)

oren

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Re: Sea Ice Extent around Antarctica
« Reply #1706 on: March 03, 2021, 02:37:33 PM »
The last few days have been quite the event for this time of year, statistically speaking.

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #1707 on: March 04, 2021, 11:31:24 AM »
JAXA ANTARCTIC SEA ICE EXTENT:  3,582,621 KM2 as at 03-Mar-2021

- Extent gain on this day 108k, 61 k more than the average gain on this day (of the last 10 years) of 47k,
- Extent gain from minimum on this date is 0.79 million km2, 0.54 million km2, (211.8%) more than the 10 year average of 0.25 million km2.
- Extent is at position #35 in the satellite record of which 20 lower values are in the years before 2000

- Extent is  309 k LESS than 2015
- Extent is  1,423 k MORE than 2017
- Extent is  1,055 k MORE than 2006
- Extent is  704 k MORE than 2020
- Extent is  492 k MORE than the 1980's Average

- On average  5.0% of ice gain from minimum to maximum done, and 201 days to maximum

Projections. (Table JAXA-Ant1)

Average remaining freeze (of the last 10 years) would produce a maximum in Sept 2020 of 19.31 million km2, 1.25 million km2 above the 2017 record low maximum of 18.06 million km2.
___________________________________________________________
The last 7 days average daily gain is 108k, 4 times the 10 years average daily gain for this period. Extent is now 35th lowest, i.e. 9th highest, in the satellite record.
___________________________________________________________
Click on image  for full-size
"Para a Causa do Povo a Luta Continua!"
"And that's all I'm going to say about that". Forrest Gump
"Damn, I wanted to see what happened next" (Epitaph)

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #1708 on: Today at 08:39:55 AM »
JAXA ANTARCTIC SEA ICE EXTENT:  3,766,609 KM2 as at 04-Mar-2021

- Extent gain on this day 184k, 130 k more than the average gain on this day (of the last 10 years) of 54k,
- Extent gain from minimum on this date is 0.98 million km2, 0.67 million km2, (216.9%) more than the 10 year average of 0.31 million km2.
- Extent is at position #36 in the satellite record of which 20 lower values are in the years before 2000

- Extent is  276 k LESS than 2015
- Extent is  1,598 k MORE than 2017
- Extent is  1,193 k MORE than 2006
- Extent is  827 k MORE than 2020
- Extent is  628 k MORE than the 1980's Average

- On average  6.1% of ice gain from minimum to maximum done, and 200 days to maximum

Projections. (Table JAXA-Ant1)

Average remaining freeze (of the last 10 years) would produce a maximum in Sept 2020 of 19.44 million km2, 1.38 million km2 above the 2017 record low maximum of 18.06 million km2.
___________________________________________________________
The very unusual daily extent gains for this time of year continue. 184k on this day makes a total gain of 943k in the last 8 days, extent that was 19th lowest 8 days ago now 36th lowest (i.e. 8th highest) in the satellite record.
___________________________________________________________
Click on 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)