Author Topic: 2023 Sea ice area and extent data (Read 326106 times)

jdallen · « **Reply #1350 on:** December 22, 2023, 06:11:33 AM »

Quote from: Juan C. García on December 22, 2023, 05:46:45 AM

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

December 21^st, 2023:
12,013,164 km², a century break increase of 142,229 km².
2023 is now 12th. lowest on record.

Betting it's the Hudson and Chukchi finally icing over.

gerontocrat · « **Reply #1351 on:** December 22, 2023, 01:44:18 PM »

JAXA ARCTIC SEA ICE EXTENT: 12,013,164 KM2 as at 21-Dec-2023

- Extent gain on this day 142k which is 89 k more than the average gain on this day (of the last 10 years) of 53k,
- Extent gain from minimum on this date is 7,877 k, which is 422 k, 5.7% more than the 10 year average of 7,455 k.

- Extent is 12th lowest in the 45 year satellite record.

- Extent is 197 k MORE than 2022,
- Extent is 51 k LESS than 2021,
- Extent is 164 k MORE than 2020,
- Extent is 353 k MORE than 2018,
- Extent is 387 k MORE than 2017
- Extent is 242 k MORE than 2012
- Extent is 1,310 k LESS than the 1980’s Average
- Extent is 232 k MORE than the 2010's Average.

On average 76.0% of extent gains from minimum to maximum done, and 74 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 14.36 million km2, 0.48 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 11th lowest in the satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1352 on:** December 22, 2023, 02:57:26 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 10,604,630 KM2 as at 21-Dec-2023

- Area gain on this day 120k, which is 50 k more than the average gain on this day (of the last 10 years) of 70k,
- Area gain from minimum on this date is 7,936 k, which is 346 k, 4.6% more than the 10 year average of 7,590 k.

- Area is at position #5 in the satellite record (#1=lowest),

- Area is 62 k MORE than 2022,
- Area is 306 k LESS than 2021,
- Area is 14 k LESS than 2020,
- Area is 44 k MORE than 2017
- Area is 1,369 k LESS than the 1980’s Average
- Area is 108 k LESS than the 2010's Average
_____________________________________________
On average 76.9% of Area gains from minimum to maximum done, and 79 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 12.89 million km2, 0.26 million km2 above the March 2016 record low maximum of 12.63 million km2, and 5th lowest in the 45 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1353 on:** December 23, 2023, 06:15:05 AM »

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

December 22^nd, 2023:
12,133,441 km², a century break increase of 120,277 km².
2023 is 12th. lowest on record.

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

gerontocrat · « **Reply #1354 on:** December 23, 2023, 11:37:58 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,133,441 KM2 as at 22-Dec-2023

- Extent gain on this day 120k which is 77 k more than the average gain on this day (of the last 10 years) of 43k,
- Extent gain from minimum on this date is 7,997 k, which is 499 k, 6.7% more than the 10 year average of 7,498 k.

- Extent is 12th lowest in the 45 year satellite record.

- Extent is 248 k MORE than 2022,
- Extent is 15 k LESS than 2021,
- Extent is 225 k MORE than 2020,
- Extent is 381 k MORE than 2018,
- Extent is 517 k MORE than 2017
- Extent is 347 k MORE than 2012
- Extent is 1,218 k LESS than the 1980’s Average
- Extent is 310 k MORE than the 2010's Average.

On average 76.5% of extent gains from minimum to maximum done, and 73 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 14.44 million km2, 0.56 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 13th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1355 on:** December 23, 2023, 05:05:29 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 10,714,086 KM2 as at 22-Dec-2023

- Area gain on this day 109k, which is 44 k more than the average gain on this day (of the last 10 years) of 65k,
- Area gain from minimum on this date is 8,045 k, which is 390 k, 5.1% more than the 10 year average of 7,655 k.

- Area is at position #5 in the satellite record (#1=lowest),

- Area is 81 k MORE than 2022,
- Area is 267 k LESS than 2021,
- Area is 18 k LESS than 2020,
- Area is 116 k MORE than 2017
- Area is 1,310 k LESS than the 1980’s Average
- Area is 53 k LESS than the 2010's Average
_____________________________________________
On average 77.5% of Area gains from minimum to maximum done, and 78 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 12.93 million km2, 0.30 million km2 above the March 2016 record low maximum of 12.63 million km2, and 5th lowest in the 45 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1356 on:** December 24, 2023, 05:14:26 AM »

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

December 23^rd, 2023:
12,200,774 km², an increase of 67,333 km².
2023 is now 13th. lowest on record.

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

gerontocrat · « **Reply #1357 on:** December 24, 2023, 10:35:55 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,200,774 KM2 as at 23-Dec-2023

- Extent gain on this day 67k which is 19 k more than the average gain on this day (of the last 10 years) of 48k,
- Extent gain from minimum on this date is 8,065 k, which is 519 k, 6.9% more than the 10 year average of 7,546 k.

- Extent is 13th lowest in the 45 year satellite record.

- Extent is 257 k MORE than 2022,
- Extent is 8 k LESS than 2021,
- Extent is 241 k MORE than 2020,
- Extent is 422 k MORE than 2018,
- Extent is 607 k MORE than 2017
- Extent is 363 k MORE than 2012
- Extent is 1,193 k LESS than the 1980’s Average
- Extent is 327 k MORE than the 2010's Average.

On average 77.0% of extent gains from minimum to maximum done, and 72 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 14.46 million km2, 0.58 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 15th lowest in the satellite record.
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N.B. Click on image to enlarge

Juan C. García · « **Reply #1358 on:** December 25, 2023, 04:48:45 AM »

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

December 24^th, 2023:
12,300,293 km², an increase of 99,519 km².
2023 is now 16th. lowest on record.

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

gerontocrat · « **Reply #1359 on:** December 25, 2023, 10:08:16 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,300,293 KM2 as at 24-Dec-2023

- Extent gain on this day 100k which is 60 k more than the average gain on this day (of the last 10 years) of 40k,
- Extent gain from minimum on this date is 8,164 k, which is 578 k, 7.6% more than the 10 year average of 7,586 k.

- Extent is 16th lowest in the 45 year satellite record.

- Extent is 336 k MORE than 2022,
- Extent is 48 k MORE than 2021,
- Extent is 319 k MORE than 2020,
- Extent is 513 k MORE than 2018,
- Extent is 647 k MORE than 2017
- Extent is 394 k MORE than 2012
- Extent is 1,167 k LESS than the 1980’s Average
- Extent is 386 k MORE than the 2010's Average.

On average 77.4% of extent gains from minimum to maximum done, and 71 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 14.52 million km2, 0.64 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 15th lowest in the satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1360 on:** December 25, 2023, 10:34:00 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 10,908,875 KM2 as at 24-Dec-2023

- Area gain on this day 92k, which is 44 k more than the average gain on this day (of the last 10 years) of 48k,
- Area gain from minimum on this date is 8,240 k, which is 482 k, 6.2% more than the 10 year average of 7,759 k.

- Area is at position #8 in the satellite record (#1=lowest),

- Area is 127 k MORE than 2022,
- Area is 229 k LESS than 2021,
- Area is 21 k MORE than 2020,
- Area is 303 k MORE than 2017
- Area is 1,185 k LESS than the 1980’s Average
- Area is 54 k MORE than the 2010's Average
_____________________________________________
On average 78.6% of Area gains from minimum to maximum done, and 76 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 13.02 million km2, 0.39 million km2 above the March 2016 record low maximum of 12.63 million km2, and 9th lowest in the 45 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1361 on:** December 26, 2023, 04:49:23 AM »

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

December 25^th, 2023:
12,363,509 km², an increase of 63,216 km².
2023 is now 17th. lowest on record.

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

gerontocrat · « **Reply #1362 on:** December 26, 2023, 10:47:27 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,363,509 KM2 as at 25-Dec-2023

- Extent gain on this day 63k which is 11 k more than the average gain on this day (of the last 10 years) of 52k,
- Extent gain from minimum on this date is 8,228 k, which is 590 k, 7.7% more than the 10 year average of 7,638 k.

- Extent is 17th lowest in the 45 year satellite record.

- Extent is 410 k MORE than 2022,
- Extent is 92 k MORE than 2021,
- Extent is 330 k MORE than 2020,
- Extent is 552 k MORE than 2018,
- Extent is 622 k MORE than 2017
- Extent is 324 k MORE than 2012
- Extent is 1,141 k LESS than the 1980’s Average
- Extent is 396 k MORE than the 2010's Average.

On average 77.9% of extent gains from minimum to maximum done, and 70 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 14.53 million km2, 0.65 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 16th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1363 on:** December 26, 2023, 04:49:58 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,001,918 KM2 as at 25-Dec-2023

- Area gain on this day 93k, which is 46 k more than the average gain on this day (of the last 10 years) of 47k,
- Area gain from minimum on this date is 8,333 k, which is 528 k, 6.8% more than the 10 year average of 7,805 k.

- Area is at position #9 in the satellite record (#1=lowest),

- Area is 156 k MORE than 2022,
- Area is 210 k LESS than 2021,
- Area is 61 k MORE than 2020,
- Area is 374 k MORE than 2017
- Area is 1,116 k LESS than the 1980’s Average
- Area is 108 k MORE than the 2010's Average
_____________________________________________
On average 79.1% of Area gains from minimum to maximum done, and 75 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 13.07 million km2, 0.44 million km2 above the March 2016 record low maximum of 12.63 million km2, and 10th lowest in the 45 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1364 on:** December 27, 2023, 07:41:52 AM »

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

December 26^th, 2023:
12,424,259 km², an increase of 60,750 km².
2023 is now 18th. lowest on record.

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

gerontocrat · « **Reply #1365 on:** December 27, 2023, 10:39:42 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,424,259 KM2 as at 26-Dec-2023

- Extent gain on this day 61k which is 17 k more than the average gain on this day (of the last 10 years) of 44k,
- Extent gain from minimum on this date is 8,288 k, which is 607 k, 7.9% more than the 10 year average of 7,682 k.

- Extent is 18th lowest in the 45 year satellite record.

- Extent is 473 k MORE than 2022,
- Extent is 139 k MORE than 2021,
- Extent is 386 k MORE than 2020,
- Extent is 581 k MORE than 2018,
- Extent is 649 k MORE than 2017
- Extent is 296 k MORE than 2012
- Extent is 1,130 k LESS than the 1980’s Average
- Extent is 404 k MORE than the 2010's Average.

On average 78.4% of extent gains from minimum to maximum done, and 69 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 14.55 million km2, 0.67 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 16th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1366 on:** December 27, 2023, 02:14:35 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,071,825 KM2 as at 26-Dec-2023

- Area gain on this day 70k, which is 23 k more than the average gain on this day (of the last 10 years) of 47k,
- Area gain from minimum on this date is 8,403 k, which is 551 k, 7.0% more than the 10 year average of 7,852 k.

- Area is at position #10 in the satellite record (#1=lowest),

- Area is 161 k MORE than 2022,
- Area is 214 k LESS than 2021,
- Area is 95 k MORE than 2020,
- Area is 407 k MORE than 2017
- Area is 1,082 k LESS than the 1980’s Average
- Area is 140 k MORE than the 2010's Average
_____________________________________________
On average 79.5% of Area gains from minimum to maximum done, and 74 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 13.09 million km2, 0.46 million km2 above the March 2016 record low maximum of 12.63 million km2, and 11th lowest in the 45 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1367 on:** December 28, 2023, 05:40:59 AM »

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

December 27^th, 2023:
12,428,777 km², an increase of 4,518 km².
2023 is now 17th. lowest on record.

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

gerontocrat · « **Reply #1368 on:** December 28, 2023, 11:56:20 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,428,777 KM2 as at 27-Dec-2023

- Extent gain on this day 5k which is 36 k less than the average gain on this day (of the last 10 years) of 41k,
- Extent gain from minimum on this date is 8,293 k, which is 571 k, 7.4% more than the 10 year average of 7,722 k.

- Extent is 17th lowest in the 45 year satellite record.

- Extent is 408 k MORE than 2022,
- Extent is 79 k MORE than 2021,
- Extent is 414 k MORE than 2020,
- Extent is 583 k MORE than 2018,
- Extent is 665 k MORE than 2017
- Extent is 221 k MORE than 2012
- Extent is 1,157 k LESS than the 1980’s Average
- Extent is 353 k MORE than the 2010's Average.

On average 78.8% of extent gains from minimum to maximum done, and 68 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 14.51 million km2, 0.63 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 15th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1369 on:** December 28, 2023, 12:55:16 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,125,048 KM2 as at 27-Dec-2023

- Area gain on this day 53k, which is 7 k more than the average gain on this day (of the last 10 years) of 46k,
- Area gain from minimum on this date is 8,456 k, which is 559 k, 7.1% more than the 10 year average of 7,897 k.

- Area is at position #10 in the satellite record (#1=lowest),

- Area is 155 k MORE than 2022,
- Area is 221 k LESS than 2021,
- Area is 132 k MORE than 2020,
- Area is 421 k MORE than 2017
- Area is 1,057 k LESS than the 1980’s Average
- Area is 150 k MORE than the 2010's Average
_____________________________________________
On average 80.0% of Area gains from minimum to maximum done, and 73 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 13.10 million km2, 0.47 million km2 above the March 2016 record low maximum of 12.63 million km2, and 12th lowest in the 45 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1370 on:** December 29, 2023, 05:36:48 AM »

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

December 28^th, 2023:
12,447,192 km², an increase of 18,415 km².
2023 is now 15th. lowest on record.

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

gerontocrat · « **Reply #1371 on:** December 29, 2023, 10:07:07 AM »

JAXA ARCTIC SEA ICE EXTENT: 12,447,192 KM2 as at 28-Dec-2023

- Extent gain on this day 18k which is 26 k less than the average gain on this day (of the last 10 years) of 44k,
- Extent gain from minimum on this date is 8,311 k, which is 545 k, 7.0% more than the 10 year average of 7,767 k.

- Extent is 15th lowest in the 45 year satellite record.

- Extent is 355 k MORE than 2022,
- Extent is 6 k LESS than 2021,
- Extent is 420 k MORE than 2020,
- Extent is 575 k MORE than 2018,
- Extent is 705 k MORE than 2017
- Extent is 149 k MORE than 2012
- Extent is 1,164 k LESS than the 1980’s Average
- Extent is 321 k MORE than the 2010's Average.

On average 79.2% 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 2024 of 14.48 million km2, 0.61 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 15th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1372 on:** December 29, 2023, 03:51:38 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,164,781 KM2 as at 28-Dec-2023

- Area gain on this day 40k, which is 8 k less than the average gain on this day (of the last 10 years) of 48k,
- Area gain from minimum on this date is 8,496 k, which is 551 k, 6.9% more than the 10 year average of 7,945 k.

- Area is at position #9 in the satellite record (#1=lowest),

- Area is 135 k MORE than 2022,
- Area is 234 k LESS than 2021,
- Area is 154 k MORE than 2020,
- Area is 415 k MORE than 2017
- Area is 1,025 k LESS than the 1980’s Average
- Area is 138 k MORE than the 2010's Average
_____________________________________________
On average 80.5% of Area gains from minimum to maximum done, and 72 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 13.09 million km2, 0.46 million km2 above the March 2016 record low maximum of 12.63 million km2, and 11th lowest in the 45 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1373 on:** December 30, 2023, 04:55:51 AM »

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

December 29^th, 2023:
12,490,763 km², an increase of 43,571 km².
2023 is 15th. lowest on record.

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

gerontocrat · « **Reply #1374 on:** December 30, 2023, 01:11:44 PM »

JAXA ARCTIC SEA ICE EXTENT: 12,490,763 KM2 as at 29-Dec-2023

- Extent gain on this day 44k which is 4 k less than the average gain on this day (of the last 10 years) of 48k,
- Extent gain from minimum on this date is 8,355 k, which is 540 k, 6.9% more than the 10 year average of 7,815 k.

- Extent is 15th lowest in the 45 year satellite record.

- Extent is 365 k MORE than 2022,
- Extent is 9 k LESS than 2021,
- Extent is 417 k MORE than 2020,
- Extent is 527 k MORE than 2018,
- Extent is 698 k MORE than 2017
- Extent is 88 k MORE than 2012
- Extent is 1,161 k LESS than the 1980’s Average
- Extent is 293 k MORE than the 2010's Average.

On average 79.7% 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 2024 of 14.48 million km2, 0.60 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 15th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1375 on:** December 30, 2023, 02:34:27 PM »

JAXA ARCTIC SEA ICE EXTENT:

Normally I post the 365 day trailing average graphs at the beginning of the month for the previous month. But with only 2 days to the end of the year, and needing all of my brain cells for end-of-year procedures, I am posting the trailing average data now.

For the last 15 months or so the 365 day trailing average has been falling from a high. But this has stalled. Not only that but if sea ice extent daily change from now is at the average of the last 10 years then the average will increase by around 0.25 million km2 over the next 12 months.

gerontocrat · « **Reply #1376 on:** December 30, 2023, 05:23:56 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,213,956 KM2 as at 29-Dec-2023

- Area gain on this day 49k, which is 1 k less than the average gain on this day (of the last 10 years) of 50k,
- Area gain from minimum on this date is 8,545 k, which is 550 k, 6.9% more than the 10 year average of 7,995 k.

- Area is at position #9 in the satellite record (#1=lowest),

- Area is 121 k MORE than 2022,
- Area is 249 k LESS than 2021,
- Area is 182 k MORE than 2020,
- Area is 413 k MORE than 2017
- Area is 1,022 k LESS than the 1980’s Average
- Area is 134 k MORE than the 2010's Average
_____________________________________________
On average 81.0% of Area gains from minimum to maximum done, and 71 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 13.09 million km2, 0.46 million km2 above the March 2016 record low maximum of 12.63 million km2, and 10th lowest in the 45 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1377 on:** December 31, 2023, 06:37:58 AM »

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

December 30^th, 2023:
12,531,209 km², an increase of 40,446 km².
2023 is now 13th. lowest on record.

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

gerontocrat · « **Reply #1378 on:** December 31, 2023, 02:05:57 PM »

JAXA ARCTIC SEA ICE EXTENT: 12,531,209 KM2 as at 30-Dec-2023

- Extent gain on this day 40k which is 2 k more than the average gain on this day (of the last 10 years) of 38k,
- Extent gain from minimum on this date is 8,395 k, which is 542 k, 6.9% more than the 10 year average of 7,853 k.

- Extent is 13th lowest in the 45 year satellite record.

- Extent is 408 k MORE than 2022,
- Extent is 21 k LESS than 2021,
- Extent is 410 k MORE than 2020,
- Extent is 478 k MORE than 2018,
- Extent is 720 k MORE than 2017
- Extent is 59 k MORE than 2012
- Extent is 1,142 k LESS than the 1980’s Average
- Extent is 281 k MORE than the 2010's Average.

On average 80.1% 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 2024 of 14.48 million km2, 0.60 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 15th lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1379 on:** December 31, 2023, 04:54:48 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,249,722 KM2 as at 30-Dec-2023

- Area gain on this day 36k, which is 9 k less than the average gain on this day (of the last 10 years) of 45k,
- Area gain from minimum on this date is 8,581 k, which is 540 k, 6.7% more than the 10 year average of 8,041 k.

- Area is at position #9 in the satellite record (#1=lowest),

- Area is 105 k MORE than 2022,
- Area is 304 k LESS than 2021,
- Area is 202 k MORE than 2020,
- Area is 407 k MORE than 2017
- Area is 1,014 k LESS than the 1980’s Average
- Area is 116 k MORE than the 2010's Average
_____________________________________________
On average 81.4% of Area gains from minimum to maximum done, and 70 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 13.08 million km2, 0.45 million km2 above the March 2016 record low maximum of 12.63 million km2, and 10th lowest in the 45 year satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1380 on:** December 31, 2023, 05:04:17 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 365 Day trailing average

The 365 Day trailing average has basically stalled this month. If daily sea ice change from now is at the average of the last 10 years then by the end of 2024 the average will increase by about 150k km2.

something's gotta give, sometime?

coelho · « **Reply #1381 on:** January 01, 2024, 12:56:15 PM »

Quote from: gerontocrat on December 30, 2023, 02:34:27 PM

JAXA ARCTIC SEA ICE EXTENT:

Normally I post the 365 day trailing average graphs at the beginning of the month for the previous month. But with only 2 days to the end of the year, and needing all of my brain cells for end-of-year procedures, I am posting the trailing average data now.

For the last 15 months or so the 365 day trailing average has been falling from a high. But this has stalled. Not only that but if sea ice extent daily change from now is at the average of the last 10 years then the average will increase by around 0.25 million km2 over the next 12 months.

In a lot of environments and businesses, a higher low followed by a higher high in a graph is considered a trend reversal. With all doom-scenarios with regards to polar ice, that would be quite a development...

Furthermore, happy New Year to all of you!

gerontocrat · « **Reply #1382 on:** January 01, 2024, 01:39:37 PM »

JAXA ARCTIC SEA ICE EXTENT: 12,570,192 KM2 as at 31-Dec-2023

- Extent gain on this day 39k which is 1 k less than the average gain on this day (of the last 10 years) of 40k,
- Extent gain from minimum on this date is 8,434 k, which is 542 k, 6.9% more than the 10 year average of 7,893 k.

- Extent is 15th lowest in the 45 year satellite record.

- Extent is 419 k MORE than 2022,
- Extent is 56 k LESS than 2021,
- Extent is 465 k MORE than 2020,
- Extent is 405 k MORE than 2018,
- Extent is 675 k MORE than 2017
- Extent is 142 k MORE than 2012
- Extent is 1,148 k LESS than the 1980’s Average
- Extent is 280 k MORE than the 2010's Average.

On average 80.5% 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 2024 of 14.48 million km2, 0.60 million km2 above the March 2017 record low maximum of 13.88 million km2, which would be 15th lowest in the satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1383 on:** January 01, 2024, 01:58:16 PM »

JAXA ARCTIC SEA ICE EXTENT: A look at 2023

The December monthly average daily sea ice extent was 11.49 million km2, 8th lowest in the 45 year satellite record, 0.31 million km2 above the longterm linear trend, and 0.09 million km2 above the December 22 average.

The 2023 annual average daily sea ice extent was 10.04 million km2, 7th lowest in the 45 year satellite record, 0.31 million km2 above the longterm linear trend, and 0.15 million km2 below the 2022 annual average.

gerontocrat · « **Reply #1384 on:** January 01, 2024, 05:07:15 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 11,289,655 KM2 as at 31-Dec-2023

- Area gain on this day 40k, which is 3 k less than the average gain on this day (of the last 10 years) of 43k,
- Area gain from minimum on this date is 8,621 k, which is 537 k, 6.6% more than the 10 year average of 8,084 k.

- Area is at position #9 in the satellite record (#1=lowest),

- Area is 114 k MORE than 2022,
- Area is 343 k LESS than 2021,
- Area is 225 k MORE than 2020,
- Area is 392 k MORE than 2017
- Area is 1,017 k LESS than the 1980’s Average
- Area is 99 k MORE than the 2010's Average
_____________________________________________
On average 81.9% of Area gains from minimum to maximum done, and 69 days to maximum

Projections. (Table NSIDC-Arctic-Area-1)

Average remaining Area gain (of the last 10 years) would produce a maximum in March 2024 of 13.08 million km2, 0.45 million km2 above the March 2016 record low maximum of 12.63 million km2, and 10th lowest in the 45 year satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1385 on:** January 01, 2024, 05:09:10 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average):

here are graphs and tables on the High Arctic & Peripheral seas

gerontocrat · « **Reply #1386 on:** January 01, 2024, 07:02:15 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): A look at 2023

The December monthly average daily sea ice area was 109.14 million km2, 4th lowest in the 45 year satellite record, 0.05 million km2 above the longterm linear trend, and 0.02 million km2 below the December 22 average.

The 2023 annual average daily sea ice area was 8.68 million km2, 6th lowest in the 45 year satellite record, 0.18 million km2 above the longterm linear trend, and 0.24 million km2 below the 2022 annual average.

Stephan · « **Reply #1387 on:** January 12, 2024, 09:31:30 PM »

I added the monthly extent value for December 2023 into my long-term plot where I calculate the extent anomalies from 1979 up to now.
The average (1979-2023) NSIDC December extent is now 12.63 M km². December 2023 had an average extent of 12.00 M km², which is 0.63 M km² below that long-term average.
This month's value was above the long-term linear trend line. The difference of the actual month from that trend line is +0.55 M km² (calculated from the linear trend line this December should have been at 11.45 M km²).

The slope of the long-term linear trend line became flatter by one digit (-0.0524 → -0.0523).

Because it is end of the year and end of a five year period in my statistics I plot the extent anomaly, the volume anomaly and the thickness anomaly graphs.

See attached graphs. Click to enlarge them.

News:

Author Topic: 2023 Sea ice area and extent data (Read 326106 times)