Author Topic: 2023 Sea ice area and extent data (Read 352141 times)

Juan C. García · « **on:** January 02, 2023, 04:32:52 AM »

I want to make an introduction, so I will not repeat myself every day.

I post a table of values and a graph daily. The source of the data is:
https://ads.nipr.ac.jp/vishop/#/extent

I will highlight:

Average of 2010 to 2019 (violet dashed line), 2023 (red) and the 5 years with daily lowest minimum, that are 2012 (green), 2020 (brown-red with dot-dash line), 2019 (brown), 2016 (orange-yellow) & 2007 (blue).
Sometimes I will also highlight 2000’s average (black).
If there is not official value for some year, sometimes I will calculate the average increase for that day and post it on the table highlighted in yellow. I can miss to calculate this value if I feel that is not significant on that day (close or more than the greatest values on the table).

On both attachments I usually include the 15 lowest values. I will include more values if the highlighted years are not within the 15 lowest. I sometimes include a couple of years more, if I want to show the next years (that are close or far away).

Sometimes a year in the 1979-1999 range falls into the 15 lowest. In that case, I'll include this year in the table values, but I can skip it in the graph.

Juan C. García · « **Reply #1 on:** January 02, 2023, 05:01:12 AM »

Happy new year to all !!!

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 1^st, 2023:
12,167,483 km², an increase of 16,178 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

P.S. Kind of a surprise to me: 2023 starts the year with ASI being lower than any of the 5 years (with the lowest daily records on September).

oren · « **Reply #2 on:** January 02, 2023, 02:31:30 PM »

It bears repeating - many thanks to Juan and Gero for keeping us up to date with well presented data. It is not an easy task, but at least be aware it is widely appreciated.

nadir · « **Reply #3 on:** January 02, 2023, 02:56:46 PM »

Quote from: Juan C. García on January 02, 2023, 05:01:12 AM

Happy new year to all !!!

P.S. Kind of a surprise to me: 2023 starts the year with ASI being lower than any of the 5 years (with the lowest daily records on September).

And being higher only than three “rebound” years , 2017, 2018 and 2021.
Happy new year

gerontocrat · « **Reply #4 on:** January 02, 2023, 03:15:45 PM »

Thanks, Oren

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,147,322 KM2 as at 01-Jan-2023

- Area gain on this day 31k, which is 25 k less than the average gain on this day (of the last 10 years) of 56k,
- Area gain from minimum on this date is 7,930 k, which is 306 k, 3.7% less than the 10 year average of 8,236 k.

- Area is at position #6 in the satellite record

- Area is 558 k LESS than 2022,
- Area is 61 k MORE than 2021,
- Area is 289 k LESS than 2020,
- Area is 514 k MORE than 2017
- Area is 1,268 k LESS than the 1980’s Average
- Area is 100 k LESS than the 2010's Average
_____________________________________________
On average 81.2% of Area gains from minimum to maximum done, and 69 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.06 million km2, 0.37 million km2 above the March 2016 record low maximum of 12.63 million km2, and 7th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #5 on:** January 02, 2023, 03:19:39 PM »

& now High Arctic sea ice area is going down while Peripheral seas ice area goes up - a reversal of the previous recent trend.

gerontocrat · « **Reply #6 on:** January 02, 2023, 05:22:42 PM »

I posted this on the 2022 thread - whoops

JAXA ARCTIC SEA ICE EXTENT: 12,167,483 KM2 as at 01-Jan-2023

- Extent gain on this day 16k which is 20 k less than the average gain on this day (of the last 10 years) of 36k,
- Extent gain from minimum on this date is 7,644 k, which is 487 k, 6.0% less than the 10 year average of 8,131 k.

- Extent is 4th lowest in the 44 year satellite record

- Extent is 7 k MORE than 2021,
- Extent is 265 k LESS than 2020,
- Extent is 222 k MORE than 2018,
- Extent is 92 k MORE than 2017
- Extent is 579 k LESS than 2012
- Extent is 1,685 k LESS than the 1980’s Average
- Extent is 173 k LESS than the 2010's Average

On average 80.4% of extent gains from minimum to maximum done, and 67 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.05 million km2, 0.18 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 5th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #7 on:** January 03, 2023, 05:46:42 AM »

Quote from: oren on January 02, 2023, 02:31:30 PM

It bears repeating - many thanks to Juan and Gero for keeping us up to date with well presented data. It is not an easy task, but at least be aware it is widely appreciated.

And thanks to Neven and a lot of posters and moderators !!!
It is worth noting that the ASIF turns 10 this year !!!

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 2^nd, 2023:
12,220,639 km², an increase of 53,156 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #8 on:** January 03, 2023, 06:35:23 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,220,639 KM2 as at 02-Jan-2023

- Extent gain on this day 53k which is 10 k more than the average gain on this day (of the last 10 years) of 43k,
- Extent gain from minimum on this date is 7,697 k, which is 472 k, 5.8% less than the 10 year average of 8,168 k.

- Extent is 4th lowest in the 44 year satellite record

- Extent is 89 k MORE than 2021,
- Extent is 254 k LESS than 2020,
- Extent is 197 k MORE than 2018,
- Extent is 84 k MORE than 2017
- Extent is 566 k LESS than 2012
- Extent is 1,676 k LESS than the 1980’s Average
- Extent is 166 k LESS than the 2010's Average

On average 80.9% of extent gains from minimum to maximum done, and 66 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.06 million km2, 0.19 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 5th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #9 on:** January 03, 2023, 06:56:27 AM »

from JAXA Extent Data - a bit more

The 365 Day Trailing average.
Since mid-2022 daily sea ice extent has mostly been below that of 2021, resulting in a fall in the 365 day trailing average. However, the currrent average of 10.19 million km2 is still 0.51 million km2 above the long-term linear trend and 0.56 million km2 above the record low in March 2021.

Average (of the last 10 years) sea ice daily gains and losses in 2023 would result is a continued fall in this 365 day average, but by end 2023 still well above the long-term linear trend - by about 0.2 million km2. This reflects the considerable increase in avearge sea ice extent over the last 2 years.

click images to enlarge.

gerontocrat · « **Reply #10 on:** January 03, 2023, 05:06:53 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,175,410 KM2 as at 02-Jan-2023

- Area gain on this day 28k, which is 21 k less than the average gain on this day (of the last 10 years) of 49k,
- Area gain from minimum on this date is 7,958 k, which is 322 k, 3.9% less than the 10 year average of 8,280 k.

- Area is at position #6 in the satellite record

- Area is 594 k LESS than 2022,
- Area is 73 k MORE than 2021,
- Area is 290 k LESS than 2020,
- Area is 502 k MORE than 2017
- Area is 1,287 k LESS than the 1980’s Average
- Area is 121 k LESS than the 2010's Average
_____________________________________________
On average 81.7% of Area gains from minimum to maximum done, and 68 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.04 million km2, 0.34 million km2 above the March 2016 record low maximum of 12.63 million km2, and 7th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

The Walrus · « **Reply #11 on:** January 03, 2023, 09:47:17 PM »

The Arctic sea ice minimum, maximum, and average extent were all above their respective trend lines for 2022, per NSIDC.

Juan C. García · « **Reply #12 on:** January 04, 2023, 04:56:07 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 3^rd, 2023:
12,292,486 km², an increase of 71,847 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #13 on:** January 04, 2023, 05:35:18 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,292,486 KM2 as at 03-Jan-2023

- Extent gain on this day 72k which is 24 k more than the average gain on this day (of the last 10 years) of 48k,
- Extent gain from minimum on this date is 7,769 k, which is 450 k, 5.5% less than the 10 year average of 8,218 k.

- Extent is 5th lowest in the 44 year satellite record

- Extent is 114 k MORE than 2021,
- Extent is 234 k LESS than 2020,
- Extent is 209 k MORE than 2018,
- Extent is 28 k MORE than 2017
- Extent is 495 k LESS than 2012
- Extent is 1,651 k LESS than the 1980’s Average
- Extent is 143 k LESS than the 2010's Average

On average 81.2% of extent gains from minimum to maximum done, and 65 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.09 million km2, 0.22 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 5th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #14 on:** January 04, 2023, 06:08:34 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,210,840 KM2 as at 03-Jan-2023

- Area gain on this day 35k, which is 14 k less than the average gain on this day (of the last 10 years) of 49k,
- Area gain from minimum on this date is 7,993 k, which is 331 k, 4.0% less than the 10 year average of 8,325 k.

- Area is at position #6 in the satellite record

- Area is 592 k LESS than 2022,
- Area is 87 k MORE than 2021,
- Area is 300 k LESS than 2020,
- Area is 498 k MORE than 2017
- Area is 1,306 k LESS than the 1980’s Average
- Area is 131 k LESS than the 2010's Average
_____________________________________________
On average 82.1% of Area gains from minimum to maximum done, and 67 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.03 million km2, 0.33 million km2 above the March 2016 record low maximum of 12.63 million km2, and 7th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #15 on:** January 05, 2023, 05:28:34 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 4^th, 2023:
12,365,778 km², an increase of 73,292 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #16 on:** January 05, 2023, 06:22:32 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,365,778 KM2 as at 04-Jan-2023

- Extent gain on this day 73k which is 30 k more than the average gain on this day (of the last 10 years) of 43k,
- Extent gain from minimum on this date is 7,842 k, which is 414 k, 5.0% less than the 10 year average of 8,256 k.

- Extent is 4th lowest in the 44 year satellite record

- Extent is 124 k MORE than 2021,
- Extent is 212 k LESS than 2020,
- Extent is 226 k MORE than 2018,
- Extent is 4 k LESS than 2017
- Extent is 387 k LESS than 2012
- Extent is 1,634 k LESS than the 1980’s Average
- Extent is 107 k LESS than the 2010's Average

On average 81.6% of extent gains from minimum to maximum done, and 64 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.13 million km2, 0.25 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 6th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #17 on:** January 05, 2023, 02:20:00 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,256,760 KM2 as at 04-Jan-2023

- Area gain on this day 46k, which is 8 k less than the average gain on this day (of the last 10 years) of 54k,
- Area gain from minimum on this date is 8,039 k, which is 332 k, 4.0% less than the 10 year average of 8,371 k.

- Area is at position #5 in the satellite record

- Area is 548 k LESS than 2022,
- Area is 107 k MORE than 2021,
- Area is 315 k LESS than 2020,
- Area is 475 k MORE than 2017
- Area is 1,310 k LESS than the 1980’s Average
- Area is 135 k LESS than the 2010's Average
_____________________________________________
On average 82.6% of Area gains from minimum to maximum done, and 66 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.03 million km2, 0.33 million km2 above the March 2016 record low maximum of 12.63 million km2, and 7th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #18 on:** January 06, 2023, 05:49:11 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,406,592 KM2 as at 05-Jan-2023

- Extent gain on this day 41k which is 6 k less than the average gain on this day (of the last 10 years) of 47k,
- Extent gain from minimum on this date is 7,883 k, which is 415 k, 5.0% less than the 10 year average of 8,298 k.

- Extent is 4th lowest in the 44 year satellite record

- Extent is 78 k MORE than 2021,
- Extent is 196 k LESS than 2020,
- Extent is 237 k MORE than 2018,
- Extent is 17 k LESS than 2017
- Extent is 355 k LESS than 2012
- Extent is 1,649 k LESS than the 1980’s Average
- Extent is 110 k LESS than the 2010's Average

On average 82.0% of extent gains from minimum to maximum done, and 63 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.13 million km2, 0.25 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 5th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #19 on:** January 06, 2023, 06:04:03 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 5^th, 2023:
12,406,592 km², an increase of 40,814 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

tyv · « **Reply #20 on:** January 06, 2023, 11:21:23 AM »

gerontocrat, two 4th places in the right column (RANK) of JAXA Arctic Extent table.

gerontocrat · « **Reply #21 on:** January 06, 2023, 02:05:37 PM »

Quote from: tyv on January 06, 2023, 11:21:23 AM

gerontocrat, two 4th places in the right column (RANK) of JAXA Arctic Extent table.

Well spotted, tyv

I missed that when 2022 became 2023.
Post corrected

Thanks,

Gero

gerontocrat · « **Reply #22 on:** January 06, 2023, 02:35:37 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,311,598 KM2 as at 05-Jan-2023

- Area gain on this day 55k, which is 6 k more than the average gain on this day (of the last 10 years) of 49k,
- Area gain from minimum on this date is 8,094 k, which is 319 k, 3.8% less than the 10 year average of 8,413 k.

- Area is at position #5 in the satellite record

- Area is 492 k LESS than 2022,
- Area is 162 k MORE than 2021,
- Area is 320 k LESS than 2020,
- Area is 434 k MORE than 2017
- Area is 1,308 k LESS than the 1980’s Average
- Area is 132 k LESS than the 2010's Average
_____________________________________________
On average 83.1% of Area gains from minimum to maximum done, and 65 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.04 million km2, 0.34 million km2 above the March 2016 record low maximum of 12.63 million km2, and 7th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #23 on:** January 06, 2023, 03:37:17 PM »

NSIDC (5-day trailing average) ARCTIC SEA ICE EXTENT: 12,631,567 KM2 as at 05-Jan-2023

- Extent gain on this day 31k, 18 k less than the average gain on this day (of the last 10 years) of 49k,
- Extent gain from minimum on this date is 7,958 k, which is 489 k, 5.8% less than the 10 year average of 8,447 k.

- Extent is at position #2 in the satellite record

- Extent is 625 k LESS than 2021,
- Extent is 48 k LESS than 2020,
- Extent is 373 k LESS than 2019,
- Extent is 34 k LESS than 2016
- Extent is 229 k LESS than 2012
- Extent is 244 k LESS than the 2010's Average
_____________________________________________
On average 82.7% of extent gains from minimum to maximum done, and 47 days to maximum

Projections. (Table NSIDC-Extent-1)
Average remaining extent gain (of the last 10 years) would produce a maximum in 2023 of 14.40 million km2, 0.16 million km2 above the March 2018 record low maximum of 14.24 million km2, which would be 4th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #24 on:** January 07, 2023, 05:19:36 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 6^th, 2023:
12,462,579 km², an increase of 55,987 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #25 on:** January 07, 2023, 07:42:21 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,462,579 KM2 as at 06-Jan-2023

- Extent gain on this day 56k which is 13 k more than the average gain on this day (of the last 10 years) of 43k,
- Extent gain from minimum on this date is 7,939 k, which is 400 k, 4.8% less than the 10 year average of 8,339 k.

- Extent is 5th lowest in the 44 year satellite record

- Extent is 74 k MORE than 2021,
- Extent is 158 k LESS than 2020,
- Extent is 295 k MORE than 2018,
- Extent is 73 k MORE than 2017
- Extent is 371 k LESS than 2012
- Extent is 1,639 k LESS than the 1980’s Average
- Extent is 99 k LESS than the 2010's Average

On average 82.6% of extent gains from minimum to maximum done, and 62 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.13 million km2, 0.26 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 7th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #26 on:** January 07, 2023, 04:17:38 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,375,263 KM2 as at 06-Jan-2023

- Area gain on this day 64k, which is 23 k more than the average gain on this day (of the last 10 years) of 41k,
- Area gain from minimum on this date is 8,158 k, which is 291 k, 3.4% less than the 10 year average of 8,449 k.

- Area is at position #5 in the satellite record

- Area is 444 k LESS than 2022,
- Area is 233 k MORE than 2021,
- Area is 308 k LESS than 2020,
- Area is 428 k MORE than 2017
- Area is 1,298 k LESS than the 1980’s Average
- Area is 118 k LESS than the 2010's Average
_____________________________________________
On average 83.4% of Area gains from minimum to maximum done, and 64 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.06 million km2, 0.37 million km2 above the March 2016 record low maximum of 12.63 million km2, and 7th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #27 on:** January 08, 2023, 05:25:49 AM »

Quote from: anthropocene on December 31, 2022, 02:41:30 PM

May I make a request for 2023? Since from 1st Jan 2023, there will always be 3 years worth of data for the 2020's could you please add the 2020s average to the tables? (That is, the average for 2020, 2021 and 2022). With ice extent and area values the trend is much more informative than the day to day values, and to a lesser extent (pun not intended) how the latest value compares to the latest trend(s) and expected values derived from the trends. With the speed of change in the arctic, even the 2010s average can sometimes seem out of date.

I can include 2020-22 average on the table of values, but not on the graph.
Do you think it helps?

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January ~~(6)~~ 7^th, 2023:
12,542,345 km², an increase of 79,766 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #28 on:** January 08, 2023, 08:50:58 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,542,345 KM2 as at 07-Jan-2023

- Extent gain on this day 80k which is 49 k more than the average gain on this day (of the last 10 years) of 31k,
- Extent gain from minimum on this date is 8,018 k, which is 354 k, 4.2% less than the 10 year average of 8,372 k.

- Extent is 5th lowest in the 44 year satellite record.

- Extent is 85 k MORE than 2021,
- Extent is 116 k LESS than 2020,
- Extent is 334 k MORE than 2018,
- Extent is 206 k MORE than 2017
- Extent is 355 k LESS than 2012
- Extent is 1,602 k LESS than the 1980’s Average
- Extent is 48 k LESS than the 2010's Average.

On average 82.9% of extent gains from minimum to maximum done, and 61 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.18 million km2, 0.30 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 7th lowest in the satellite record
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #29 on:** January 08, 2023, 02:18:05 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,450,735 KM2 as at 07-Jan-2023

- Area gain on this day 75k, which is 39 k more than the average gain on this day (of the last 10 years) of 36k,
- Area gain from minimum on this date is 8,233 k, which is 247 k, 2.9% less than the 10 year average of 8,481 k.

- Area is at position #6 in the satellite record

- Area is 398 k LESS than 2022,
- Area is 291 k MORE than 2021,
- Area is 294 k LESS than 2020,
- Area is 470 k MORE than 2017
- Area is 1,279 k LESS than the 1980’s Average
- Area is 85 k LESS than the 2010's Average
_____________________________________________
On average 83.7% of Area gains from minimum to maximum done, and 63 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.11 million km2, 0.41 million km2 above the March 2016 record low maximum of 12.63 million km2, and 10th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Glen Koehler · « **Reply #30 on:** January 08, 2023, 08:57:08 PM »

Quote from: Juan C. García on January 08, 2023, 05:25:49 AM

the arctic, even the 2010s average can sometimes seem out of date.

I can include 2020-22 average on the table of values, but not on the graph.
Do you think it helps?

[/quote]
Yes, please, and thank you.

Juan C. García · « **Reply #31 on:** January 09, 2023, 06:31:40 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 8^th, 2023:
12,622,201 km², an increase of 79,856 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #32 on:** January 09, 2023, 08:46:21 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,622,201 KM2 as at 08-Jan-2023

- Extent gain on this day 80k which is 51 k more than the average gain on this day (of the last 10 years) of 29k,
- Extent gain from minimum on this date is 8,098 k, which is 310 k, 3.7% less than the 10 year average of 8,408 k.

- Extent is 8th lowest in the 44 year satellite record.

- Extent is 101 k MORE than 2021,
- Extent is 78 k LESS than 2020,
- Extent is 384 k MORE than 2018,
- Extent is 293 k MORE than 2017
- Extent is 388 k LESS than 2012
- Extent is 1,571 k LESS than the 1980’s Average
- Extent is 7 k MORE than the 2010's Average.

On average 83.3% of extent gains from minimum to maximum done, and 60 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.22 million km2, 0.35 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 8th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #33 on:** January 09, 2023, 02:32:41 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,535,585 KM2 as at 08-Jan-2023

- Area gain on this day 85k, which is 58 k more than the average gain on this day (of the last 10 years) of 27k,
- Area gain from minimum on this date is 8,318 k, which is 186 k, 2.2% less than the 10 year average of 8,504 k.

- Area is at position #7 in the satellite record

- Area is 365 k LESS than 2022,
- Area is 370 k MORE than 2021,
- Area is 262 k LESS than 2020,
- Area is 534 k MORE than 2017
- Area is 1,233 k LESS than the 1980’s Average
- Area is 34 k LESS than the 2010's Average
_____________________________________________
On average 83.9% of Area gains from minimum to maximum done, and 62 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.16 million km2, 0.47 million km2 above the March 2016 record low maximum of 12.63 million km2, and 11th lowest in the 44 year satellite record.
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N.B. Click on image to enlarge

Juan C. García · « **Reply #34 on:** January 10, 2023, 05:06:21 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 9^th, 2023:
12,651,666 km², an increase of 29,465 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #35 on:** January 10, 2023, 07:37:40 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,651,666 KM2 as at 09-Jan-2023

- Extent gain on this day 29k which is 7 k less than the average gain on this day (of the last 10 years) of 36k,
- Extent gain from minimum on this date is 8,128 k, which is 325 k, 3.8% less than the 10 year average of 8,453 k.

- Extent is 7th lowest in the 44 year satellite record.

- Extent is 33 k MORE than 2021,
- Extent is 25 k LESS than 2020,
- Extent is 372 k MORE than 2018,
- Extent is 325 k MORE than 2017
- Extent is 469 k LESS than 2012
- Extent is 1,583 k LESS than the 1980’s Average
- Extent is 9 k LESS than the 2010's Average.

On average 83.8% of extent gains from minimum to maximum done, and 59 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.20 million km2, 0.33 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 7th lowest in the satellite record.
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N.B. Click on image to enlarge

anthropocene · « **Reply #36 on:** January 10, 2023, 08:00:56 AM »

I can include 2020-22 average on the table of values, but not on the graph.
Do you think it helps?

Yes - thank you. It's a calculation I often do in my head. This will save some brain energy. My recollection is that winter value is higher than where a linear trend would put it. The summer value is closer to the linear trend. I'm interested in how it plays out over the year.

gerontocrat · « **Reply #37 on:** January 10, 2023, 02:20:33 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,617,189 KM2 as at 09-Jan-2023

- Area gain on this day 82k, which is 59 k more than the average gain on this day (of the last 10 years) of 23k,
- Area gain from minimum on this date is 8,400 k, which is 126 k, 1.5% less than the 10 year average of 8,526 k.

- Area is at position #7 in the satellite record

- Area is 342 k LESS than 2022,
- Area is 452 k MORE than 2021,
- Area is 208 k LESS than 2020,
- Area is 617 k MORE than 2017
- Area is 1,183 k LESS than the 1980’s Average
- Area is 18 k MORE than the 2010's Average
_____________________________________________
On average 84.1% of Area gains from minimum to maximum done, and 61 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.22 million km2, 0.52 million km2 above the March 2016 record low maximum of 12.63 million km2, and 12th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #38 on:** January 11, 2023, 05:28:31 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 10^th, 2023:
12,654,282 km², an increase of 2,616 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #39 on:** January 11, 2023, 06:44:55 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,654,282 KM2 as at 10-Jan-2023

- Extent gain on this day 3k which is 51 k less than the average gain on this day (of the last 10 years) of 54k,
- Extent gain from minimum on this date is 8,130 k, which is 379 k, 4.5% less than the 10 year average of 8,509 k.

- Extent is 5th lowest in the 44 year satellite record.

- Extent is 26 k LESS than 2021,
- Extent is 10 k LESS than 2020,
- Extent is 342 k MORE than 2018,
- Extent is 318 k MORE than 2017
- Extent is 523 k LESS than 2012
- Extent is 1,615 k LESS than the 1980’s Average
- Extent is 62 k LESS than the 2010's Average.

On average 84.4% of extent gains from minimum to maximum done, and 58 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.15 million km2, 0.27 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 7th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #40 on:** January 11, 2023, 10:35:22 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,691,248 KM2 as at 10-Jan-2023

- Area gain on this day 74k, which is 48 k more than the average gain on this day (of the last 10 years) of 26k,
- Area gain from minimum on this date is 8,474 k, which is 79 k, 0.9% less than the 10 year average of 8,553 k.

- Area is at position #8 in the satellite record

- Area is 327 k LESS than 2022,
- Area is 490 k MORE than 2021,
- Area is 144 k LESS than 2020,
- Area is 685 k MORE than 2017
- Area is 1,121 k LESS than the 1980’s Average
- Area is 65 k MORE than the 2010's Average
_____________________________________________
On average 84.3% of Area gains from minimum to maximum done, and 60 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.26 million km2, 0.57 million km2 above the March 2016 record low maximum of 12.63 million km2, and 12th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #41 on:** January 12, 2023, 04:51:51 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 11^th, 2023:
12,686,243 km², an increase of 31,961 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #42 on:** January 12, 2023, 09:39:40 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,686,243 KM2 as at 11-Jan-2023

- Extent gain on this day 32k which is 13 k less than the average gain on this day (of the last 10 years) of 45k,
- Extent gain from minimum on this date is 8,162 k, which is 397 k, 4.6% less than the 10 year average of 8,559 k.

- Extent is 5th lowest in the 44 year satellite record.

- Extent is 12 k MORE than 2021,
- Extent is 24 k LESS than 2020,
- Extent is 355 k MORE than 2018,
- Extent is 289 k MORE than 2017
- Extent is 548 k LESS than 2012
- Extent is 1,609 k LESS than the 1980’s Average
- Extent is 87 k LESS than the 2010's Average.

On average 84.9% of extent gains from minimum to maximum done, and 57 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.13 million km2, 0.25 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 6th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #43 on:** January 12, 2023, 07:13:44 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,740,477 KM2 as at 11-Jan-2023

- Area gain on this day 49k, which is 14 k more than the average gain on this day (of the last 10 years) of 35k,
- Area gain from minimum on this date is 8,523 k, which is 67 k, 0.8% less than the 10 year average of 8,590 k.

- Area is at position #8 in the satellite record

- Area is 332 k LESS than 2022,
- Area is 485 k MORE than 2021,
- Area is 115 k LESS than 2020,
- Area is 699 k MORE than 2017
- Area is 1,097 k LESS than the 1980’s Average
- Area is 82 k MORE than the 2010's Average
_____________________________________________
On average 84.7% of Area gains from minimum to maximum done, and 59 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.27 million km2, 0.58 million km2 above the March 2016 record low maximum of 12.63 million km2, and 12th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #44 on:** January 13, 2023, 04:47:06 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 12^th, 2023:
12,712,404 km², an increase of 26,161 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #45 on:** January 13, 2023, 09:18:02 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,712,404 KM2 as at 12-Jan-2023

- Extent gain on this day 26k which is 19 k less than the average gain on this day (of the last 10 years) of 45k,
- Extent gain from minimum on this date is 8,188 k, which is 422 k, 4.9% less than the 10 year average of 8,610 k.

- Extent is 4th lowest in the 44 year satellite record.

- Extent is 76 k LESS than 2021,
- Extent is 101 k LESS than 2020,
- Extent is 344 k MORE than 2018,
- Extent is 334 k MORE than 2017
- Extent is 604 k LESS than 2012
- Extent is 1,620 k LESS than the 1980’s Average
- Extent is 104 k LESS than the 2010's Average.

On average 85.2% of extent gains from minimum to maximum done, and 56 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.11 million km2, 0.24 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 5th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #46 on:** January 13, 2023, 07:17:42 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,770,197 KM2 as at 12-Jan-2023

- Area gain on this day 30k, which is 8 k less than the average gain on this day (of the last 10 years) of 38k,
- Area gain from minimum on this date is 8,553 k, which is 76 k, 0.9% less than the 10 year average of 8,629 k.

- Area is at position #8 in the satellite record

- Area is 342 k LESS than 2022,
- Area is 460 k MORE than 2021,
- Area is 107 k LESS than 2020,
- Area is 705 k MORE than 2017
- Area is 1,080 k LESS than the 1980’s Average
- Area is 77 k MORE than the 2010's Average
_____________________________________________
On average 85.1% of Area gains from minimum to maximum done, and 58 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.26 million km2, 0.57 million km2 above the March 2016 record low maximum of 12.63 million km2, and 12th lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #47 on:** January 14, 2023, 05:17:30 AM »

[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

January 13^th, 2023:
12,721,330 km², an increase of 8,926 km².

For comments, see the first post in this thread.
Source: https://ads.nipr.ac.jp/vishop/#/extent

gerontocrat · « **Reply #48 on:** January 14, 2023, 09:06:53 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,721,330 KM2 as at 13-Jan-2023

- Extent gain on this day 9k which is 26 k less than the average gain on this day (of the last 10 years) of 35k,
- Extent gain from minimum on this date is 8,197 k, which is 446 k, 5.2% less than the 10 year average of 8,644 k.

- Extent is 3rd lowest in the 44 year satellite record.

- Extent is 158 k LESS than 2021,
- Extent is 114 k LESS than 2020,
- Extent is 290 k MORE than 2018,
- Extent is 364 k MORE than 2017
- Extent is 557 k LESS than 2012
- Extent is 1,662 k LESS than the 1980’s Average
- Extent is 127 k LESS than the 2010's Average.

On average 85.5% of extent gains from minimum to maximum done, and 55 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 14.09 million km2, 0.22 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 5th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #49 on:** January 14, 2023, 03:03:45 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,790,802 KM2 as at 13-Jan-2023

- Area gain on this day 21k, which is 23 k less than the average gain on this day (of the last 10 years) of 44k,
- Area gain from minimum on this date is 8,573 k, which is 100 k, 1.2% less than the 10 year average of 8,674 k.

- Area is at position #8 in the satellite record

- Area is 345 k LESS than 2022,
- Area is 401 k MORE than 2021,
- Area is 112 k LESS than 2020,
- Area is 705 k MORE than 2017
- Area is 1,070 k LESS than the 1980’s Average
- Area is 56 k MORE than the 2010's Average
_____________________________________________
On average 85.5% of Area gains from minimum to maximum done, and 57 days to maximum

Projections. (Table JAXA-Arc1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2023 of 13.24 million km2, 0.54 million km2 above the March 2016 record low maximum of 12.63 million km2, and 12th lowest in the 44 year satellite record.
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N.B. Click on image to enlarge

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Author Topic: 2023 Sea ice area and extent data (Read 352141 times)