Author Topic: 2023 Sea ice area and extent data (Read 343588 times)

gerontocrat · « **Reply #1050 on:** September 21, 2023, 10:39:21 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,190,380 KM2 as at 20-Sep-2023

- Extent gain on this day 9k which is 23 k less than the average gain on this day (of the last 10 years) of 32k,
- Extent gain from minimum on this date is 54 k, which is 122 k, 69.1% less than the 10 year average of 176 k.

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

- Extent is 623 k LESS than 2021,
- Extent is 467 k MORE than 2020,
- Extent is 283 k LESS than 2018,
- Extent is 455 k LESS than 2017
- Extent is 763 k MORE than 2012
- Extent is 3,190 k LESS than the 1980’s Average
- Extent is 281 k LESS than the 2010's Average.

On average 1.8% of extent gains from minimum to maximum done, and 168 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 13.82 million km2, 0.06 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1051 on:** September 21, 2023, 08:41:12 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 2,719,326 KM2 as at 20-Sep-2023

- Area gain on this day 10k, which is 18 k less than the average gain on this day (of the last 10 years) of 28k,
- Area gain from minimum on this date is 51 k, which is 177 k, 77.8% less than the 10 year average of 228 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 785 k LESS than 2022,
- Area is 795 k LESS than 2021,
- Area is 44 k LESS than 2020,
- Area is 668 k LESS than 2017
- Area is 2,852 k LESS than the 1980’s Average
- Area is 550 k LESS than the 2010's Average
_____________________________________________
On average 2.3% of Area gains from minimum to maximum done, and 171 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 12.36 million km2, 0.27 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1052 on:** September 22, 2023, 03:25:23 AM »

& I nearly forgot....

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

High Arctic & Peripheral Seas tables & graphs attached.

Juan C. García · « **Reply #1053 on:** September 22, 2023, 06:07:57 AM »

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

September 21^st, 2023:
4,206,245 km², an increase of 15,865 km².

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

gerontocrat · « **Reply #1054 on:** September 22, 2023, 10:00:58 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,206,245 KM2 as at 21-Sep-2023

- Extent gain on this day 16k which is 17 k less than the average gain on this day (of the last 10 years) of 33k,
- Extent gain from minimum on this date is 70 k, which is 138 k, 66.3% less than the 10 year average of 209 k.

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

- Extent is 619 k LESS than 2021,
- Extent is 455 k MORE than 2020,
- Extent is 251 k LESS than 2018,
- Extent is 475 k LESS than 2017
- Extent is 765 k MORE than 2012
- Extent is 3,202 k LESS than the 1980’s Average
- Extent is 295 k LESS than the 2010's Average.

On average 2.1% of extent gains from minimum to maximum done, and 167 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2023 of 13.80 million km2, 0.08 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1055 on:** September 23, 2023, 06:09:11 AM »

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

September 22^nd, 2023:
4,227,554 km², an increase of 21,309 km².

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

gerontocrat · « **Reply #1056 on:** September 23, 2023, 11:07:29 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,227,554 KM2 as at 22-Sep-2023

- Extent gain on this day 21k which is 11 k less than the average gain on this day (of the last 10 years) of 32k,
- Extent gain from minimum on this date is 92 k, which is 149 k, 62.0% less than the 10 year average of 241 k.

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

- Extent is 626 k LESS than 2021,
- Extent is 414 k MORE than 2020,
- Extent is 258 k LESS than 2018,
- Extent is 474 k LESS than 2017
- Extent is 791 k MORE than 2012
- Extent is 3,210 k LESS than the 1980’s Average
- Extent is 306 k LESS than the 2010's Average.

On average 2.5% of extent gains from minimum to maximum done, and 166 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.79 million km2, 0.09 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1057 on:** September 23, 2023, 12:25:12 PM »

NSIDC have got problems, though they have managed to produce 21 September data a few hours ago

See images attached

gerontocrat · « **Reply #1058 on:** September 23, 2023, 01:37:51 PM »

NSIDC back in action

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 2,760,641 KM2 as at 22-Sep-2023

- Area gain on this day 25k, which is 1 k less than the average gain on this day (of the last 10 years) of 26k,
- Area gain from minimum on this date is 92 k, which is 193 k, 67.7% less than the 10 year average of 285 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 871 k LESS than 2022,
- Area is 742 k LESS than 2021,
- Area is 122 k LESS than 2020,
- Area is 606 k LESS than 2017
- Area is 2,904 k LESS than the 1980’s Average
- Area is 558 k LESS than the 2010's Average
_____________________________________________
On average 2.9% of Area gains from minimum to maximum done, and 169 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 12.35 million km2, 0.28 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1059 on:** September 24, 2023, 05:45:33 AM »

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

September 23^rd, 2023:
4,244,887 km², an increase of 17,333 km².

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

gerontocrat · « **Reply #1060 on:** September 24, 2023, 09:45:53 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,244,887 KM2 as at 23-Sep-2023

- Extent gain on this day 17k which is 24 k less than the average gain on this day (of the last 10 years) of 41k,
- Extent gain from minimum on this date is 109 k, which is 173 k, 61.3% less than the 10 year average of 282 k.

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

- Extent is 637 k LESS than 2021,
- Extent is 376 k MORE than 2020,
- Extent is 291 k LESS than 2018,
- Extent is 456 k LESS than 2017
- Extent is 770 k MORE than 2012
- Extent is 3,228 k LESS than the 1980’s Average
- Extent is 331 k LESS than the 2010's Average.

On average 2.9% of extent gains from minimum to maximum done, and 165 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.77 million km2, 0.11 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1061 on:** September 24, 2023, 11:49:23 AM »

NSIDC still has problems.

gerontocrat · « **Reply #1062 on:** September 24, 2023, 05:35:09 PM »

Despite the problems, the data keeps on coming. I guess some people at NSIDC have had their weekend ruined.

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 2,786,688 KM2 as at 23-Sep-2023

- Area gain on this day 26k, which is 2 k less than the average gain on this day (of the last 10 years) of 28k,
- Area gain from minimum on this date is 118 k, which is 195 k, 62.3% less than the 10 year average of 313 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 894 k LESS than 2022,
- Area is 706 k LESS than 2021,
- Area is 152 k LESS than 2020,
- Area is 560 k LESS than 2017
- Area is 2,930 k LESS than the 1980’s Average
- Area is 562 k LESS than the 2010's Average
_____________________________________________
On average 3.2% of Area gains from minimum to maximum done, and 168 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 12.35 million km2, 0.28 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1063 on:** September 25, 2023, 06:48:53 AM »

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

September 24^th, 2023:
4,316,399 km², an increase of 71,512 km².

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

gerontocrat · « **Reply #1064 on:** September 25, 2023, 09:52:54 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,316,399 KM2 as at 24-Sep-2023

- Extent gain on this day 72k which is 16 k more than the average gain on this day (of the last 10 years) of 56k,
- Extent gain from minimum on this date is 180 k, which is 157 k, 46.5% less than the 10 year average of 337 k.

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

- Extent is 592 k LESS than 2021,
- Extent is 384 k MORE than 2020,
- Extent is 286 k LESS than 2018,
- Extent is 388 k LESS than 2017
- Extent is 796 k MORE than 2012
- Extent is 3,197 k LESS than the 1980’s Average
- Extent is 312 k LESS than the 2010's Average.

On average 3.4% of extent gains from minimum to maximum done, and 164 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.78 million km2, 0.10 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1065 on:** September 25, 2023, 05:00:57 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 2,821,603 KM2 as at 24-Sep-2023

- Area gain on this day 35k, which is 2 k more than the average gain on this day (of the last 10 years) of 33k,
- Area gain from minimum on this date is 153 k, which is 193 k, 55.8% less than the 10 year average of 346 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 885 k LESS than 2022,
- Area is 679 k LESS than 2021,
- Area is 157 k LESS than 2020,
- Area is 521 k LESS than 2017
- Area is 2,951 k LESS than the 1980’s Average
- Area is 566 k LESS than the 2010's Average
_____________________________________________
On average 3.5% of Area gains from minimum to maximum done, and 167 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 12.35 million km2, 0.28 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1066 on:** September 26, 2023, 06:23:09 AM »

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

September 25^th, 2023:
4,382,337 km², an increase of 65,938 km².

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

Renerpho · « **Reply #1067 on:** September 26, 2023, 06:33:02 AM »

I miss Jim Pettit's excellent chart http://iwantsomeproof.com/extimg/sie_nsidc_max_min_plus_step_days.png, which hasn't been updated since 2021... So I remade it.

I hope you'll find it as useful as I do.

Note that Pettit and I use slightly different formulas, resulting in some small differences between our numbers.

FredBear · « **Reply #1068 on:** September 26, 2023, 10:41:17 AM »

Renerpho, that graphic is an excellent way of showing changes in melt timing! Thank you (& Jim).
(Of course the greedy among us might think that the freezing equivalent might show another facet as that may illustrate another critical time??)

gerontocrat · « **Reply #1069 on:** September 26, 2023, 10:49:29 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,382,337 KM2 as at 25-Sep-2023

- Extent gain on this day 66k which is 19 k more than the average gain on this day (of the last 10 years) of 47k,
- Extent gain from minimum on this date is 246 k, which is 138 k, 35.8% less than the 10 year average of 384 k.

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

- Extent is 539 k LESS than 2021,
- Extent is 340 k MORE than 2020,
- Extent is 278 k LESS than 2018,
- Extent is 373 k LESS than 2017
- Extent is 842 k MORE than 2012
- Extent is 3,174 k LESS than the 1980’s Average
- Extent is 294 k LESS than the 2010's Average.

On average 3.9% of extent gains from minimum to maximum done, and 163 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.80 million km2, 0.08 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1070 on:** September 26, 2023, 08:10:42 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 2,865,465 KM2 as at 25-Sep-2023

- Area gain on this day 44k, which is 6 k more than the average gain on this day (of the last 10 years) of 38k,
- Area gain from minimum on this date is 197 k, which is 187 k, 48.8% less than the 10 year average of 384 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 864 k LESS than 2022,
- Area is 670 k LESS than 2021,
- Area is 142 k LESS than 2020,
- Area is 498 k LESS than 2017
- Area is 2,966 k LESS than the 1980’s Average
- Area is 566 k LESS than the 2010's Average
_____________________________________________
On average 3.9% of Area gains from minimum to maximum done, and 166 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 12.35 million km2, 0.28 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1071 on:** September 26, 2023, 09:34:18 PM »

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

Tables & Graphs for the High Arctic & the Peripheral Seas attached.

Melt still on in the CAA & Laptev, while Greenland Sea high sea ice area increases just keep on coming

Renerpho · « **Reply #1072 on:** September 27, 2023, 01:11:09 AM »

Quote from: Renerpho on September 26, 2023, 06:33:02 AM

I miss Jim Pettit's excellent chart http://iwantsomeproof.com/extimg/sie_nsidc_max_min_plus_step_days.png, which hasn't been updated since 2021... So I remade it.

I hope you'll find it as useful as I do.

Note that Pettit and I use slightly different formulas, resulting in some small differences between our numbers.

Quote from: FredBear on September 26, 2023, 10:41:17 AM

Renerpho, that graphic is an excellent way of showing changes in melt timing! Thank you (& Jim).
(Of course the greedy among us might think that the freezing equivalent might show another facet as that may illustrate another critical time??)

I am one of those greedy people.

Here is the corresponding chart for the freezing season. It starts in 1988/89. The earlier data will need some care before I can include it.

Juan C. García · « **Reply #1073 on:** September 27, 2023, 06:05:43 AM »

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

September 26^th, 2023:
4,405,080 km², an increase of 22,743 km².

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

Renerpho · « **Reply #1074 on:** September 27, 2023, 06:20:25 AM »

I have made a few changes to the charts. I have also added the missing freezing seasons.

Jim Pettit's original chart already included decadal averages, which nicely show trends that are hardly visible when looking at single years.

I'm sure this could be used to do all kinds of analysis. I'll think about it some more.

Niall Dollard · « **Reply #1075 on:** September 27, 2023, 07:37:54 AM »

Thanks Renerpho for restoring and updating the chart.

I wonder will I ever see 15 million km2+ again in my lifetime ?

<edit: I see we did surpass 15 million in 2020, barely. (15.05 max, ) . My original thought was that 2013 was the last.occasion>

Renerpho · « **Reply #1076 on:** September 27, 2023, 08:35:09 AM »

Quote from: Niall Dollard on September 27, 2023, 07:37:54 AM

Thanks Renerpho for restoring and updating the chart.

I wonder will I ever see 15 million km2+ again in my lifetime ?

<edit: I see we did surpass 15 million in 2020, barely. (15.05 max, ) . My original thought was that 2013 was the last.occasion>

2020 possibly was to 15 million km²+ what 1998 was to 16 million.

gerontocrat · « **Reply #1077 on:** September 27, 2023, 09:19:58 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,405,080 KM2 as at 26-Sep-2023

- Extent gain on this day 23k which is 11 k less than the average gain on this day (of the last 10 years) of 34k,
- Extent gain from minimum on this date is 269 k, which is 149 k, 35.6% less than the 10 year average of 418 k.

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

- Extent is 545 k LESS than 2021,
- Extent is 319 k MORE than 2020,
- Extent is 279 k LESS than 2018,
- Extent is 434 k LESS than 2017
- Extent is 836 k MORE than 2012
- Extent is 3,193 k LESS than the 1980’s Average
- Extent is 311 k LESS than the 2010's Average.

On average 4.3% of extent gains from minimum to maximum done, and 162 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.79 million km2, 0.09 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

oren · « **Reply #1078 on:** September 27, 2023, 09:24:47 AM »

Folks, please keep the data thread for data, not discussions.
A couple of posts moved to Freeform seasonal thread.

kassy · « **Reply #1079 on:** September 27, 2023, 04:20:15 PM »

I suggest putting the Petit chart updates in a separate thread in the other Cryo section (if falls under science) so they are easy to find and update once another year rolls by.

https://forum.arctic-sea-ice.net/index.php/board,23.0.html

gerontocrat · « **Reply #1080 on:** September 27, 2023, 05:35:36 PM »

No NSIDC data updates yet.
Even Nico Sun's graphs are stuck on Sep 25.

gerontocrat · « **Reply #1081 on:** September 27, 2023, 07:44:56 PM »

We have data

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 2,904,451 KM2 as at 26-Sep-2023

- Area gain on this day 39k, which is 2 k less than the average gain on this day (of the last 10 years) of 41k,
- Area gain from minimum on this date is 236 k, which is 189 k, 44.5% less than the 10 year average of 425 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 825 k LESS than 2022,
- Area is 685 k LESS than 2021,
- Area is 136 k LESS than 2020,
- Area is 506 k LESS than 2017
- Area is 2,989 k LESS than the 1980’s Average
- Area is 576 k LESS than the 2010's Average
_____________________________________________
On average 4.3% of Area gains from minimum to maximum done, and 165 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 12.35 million km2, 0.28 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1082 on:** September 28, 2023, 06:26:17 AM »

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

September 27^th, 2023:
4,409,784 km², an increase of 4,704 km².

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

gerontocrat · « **Reply #1083 on:** September 28, 2023, 10:41:46 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,409,784 KM2 as at 27-Sep-2023

- Extent gain on this day 5k which is 35 k less than the average gain on this day (of the last 10 years) of 40k,
- Extent gain from minimum on this date is 274 k, which is 184 k, 40.2% less than the 10 year average of 458 k.

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

- Extent is 562 k LESS than 2021,
- Extent is 339 k MORE than 2020,
- Extent is 293 k LESS than 2018,
- Extent is 479 k LESS than 2017
- Extent is 787 k MORE than 2012
- Extent is 3,239 k LESS than the 1980’s Average
- Extent is 363 k LESS than the 2010's Average.

On average 4.7% of extent gains from minimum to maximum done, and 161 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.76 million km2, 0.12 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

gerontocrat · « **Reply #1084 on:** September 28, 2023, 10:50:16 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,409,784 KM2

The 7 day trailing average of daily sea ice change shows much more clearly how consistently late season melt was above average and early season freeze has been below average. A warm Arctic (air & ocean) ?

gerontocrat · « **Reply #1085 on:** September 28, 2023, 03:51:40 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 2,944,256 KM2 as at 27-Sep-2023

- Area gain on this day 40k, which is 5 k less than the average gain on this day (of the last 10 years) of 45k,
- Area gain from minimum on this date is 276 k, which is 195 k, 41.4% less than the 10 year average of 470 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 796 k LESS than 2022,
- Area is 700 k LESS than 2021,
- Area is 115 k LESS than 2020,
- Area is 554 k LESS than 2017
- Area is 3,007 k LESS than the 1980’s Average
- Area is 591 k LESS than the 2010's Average
_____________________________________________
On average 4.8% of Area gains from minimum to maximum done, and 164 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 12.35 million km2, 0.28 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1086 on:** September 29, 2023, 06:12:43 AM »

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

September 28^th, 2023:
4,419,197 km², an increase of 9,413 km².

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

gerontocrat · « **Reply #1087 on:** September 29, 2023, 11:02:59 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,419,197 KM2 as at 28-Sep-2023

- Extent gain on this day 9k which is 35 k less than the average gain on this day (of the last 10 years) of 44k,
- Extent gain from minimum on this date is 283 k, which is 219 k, 43.6% less than the 10 year average of 502 k.

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

- Extent is 577 k LESS than 2021,
- Extent is 342 k MORE than 2020,
- Extent is 295 k LESS than 2018,
- Extent is 578 k LESS than 2017
- Extent is 737 k MORE than 2012
- Extent is 3,278 k LESS than the 1980’s Average
- Extent is 408 k LESS than the 2010's Average.

On average 5.1% of extent gains from minimum to maximum done, and 160 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.72 million km2, 0.16 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
_______________________________________________________________
N.B. Click on image to enlarge

Juan C. García · « **Reply #1088 on:** September 30, 2023, 06:03:28 AM »

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

September 29^th, 2023:
4,457,978 km², an increase of 38,781 km².

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

gerontocrat · « **Reply #1089 on:** September 30, 2023, 10:48:39 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,457,978 KM2 as at 29-Sep-2023

- Extent gain on this day 39k which is 2 k more than the average gain on this day (of the last 10 years) of 37k,
- Extent gain from minimum on this date is 322 k, which is 217 k, 40.3% less than the 10 year average of 539 k.

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

- Extent is 581 k LESS than 2021,
- Extent is 342 k MORE than 2020,
- Extent is 272 k LESS than 2018,
- Extent is 562 k LESS than 2017
- Extent is 718 k MORE than 2012
- Extent is 3,302 k LESS than the 1980’s Average
- Extent is 408 k LESS than the 2010's Average.

On average 5.5% of extent gains from minimum to maximum done, and 159 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.72 million km2, 0.16 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1090 on:** September 30, 2023, 06:11:18 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 3,043,876 KM2 as at 29-Sep-2023

- Area gain on this day 50k, which is 6 k more than the average gain on this day (of the last 10 years) of 44k,
- Area gain from minimum on this date is 375 k, which is 182 k, 32.6% less than the 10 year average of 557 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 766 k LESS than 2022,
- Area is 703 k LESS than 2021,
- Area is 54 k LESS than 2020,
- Area is 682 k LESS than 2017
- Area is 3,023 k LESS than the 1980’s Average
- Area is 592 k LESS than the 2010's Average
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On average 5.6% of Area gains from minimum to maximum done, and 162 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 12.36 million km2, 0.27 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
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N.B. Click on image to enlarge

Juan C. García · « **Reply #1091 on:** October 01, 2023, 05:43:44 AM »

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

September 30^th, 2023:
4,517,243 km², an increase of 59,265 km².

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

gerontocrat · « **Reply #1092 on:** October 01, 2023, 10:56:02 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,517,243 KM2 as at 30-Sep-2023

- Extent gain on this day 59k which is 20 k more than the average gain on this day (of the last 10 years) of 39k,
- Extent gain from minimum on this date is 381 k, which is 197 k, 34.1% less than the 10 year average of 579 k.

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

- Extent is 544 k LESS than 2021,
- Extent is 377 k MORE than 2020,
- Extent is 222 k LESS than 2018,
- Extent is 531 k LESS than 2017
- Extent is 716 k MORE than 2012
- Extent is 3,301 k LESS than the 1980’s Average
- Extent is 398 k LESS than the 2010's Average.

On average 5.9% of extent gains from minimum to maximum done, and 158 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.74 million km2, 0.14 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1093 on:** October 01, 2023, 01:21:05 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 3,094,690 KM2 as at 30-Sep-2023

- Area gain on this day 51k, which is 6 k more than the average gain on this day (of the last 10 years) of 45k,
- Area gain from minimum on this date is 426 k, which is 176 k, 29.2% less than the 10 year average of 602 k.

- Area is at position #2 in the satellite record (#1=lowest),

- Area is 752 k LESS than 2022,
- Area is 689 k LESS than 2021,
- Area is 24 k LESS than 2020,
- Area is 735 k LESS than 2017
- Area is 3,024 k LESS than the 1980’s Average
- Area is 595 k LESS than the 2010's Average
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On average 6.1% of Area gains from minimum to maximum done, and 161 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 12.37 million km2, 0.26 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
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N.B. Click on image to enlarge

Juan C. García · « **Reply #1094 on:** October 02, 2023, 05:49:43 AM »

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

October 1^st, 2023:
4,583,050 km², an increase of 65,807 km².

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

gerontocrat · « **Reply #1095 on:** October 02, 2023, 10:56:25 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,583,050 KM2 as at 01-Oct-2023

- Extent gain on this day 66k which is 26 k more than the average gain on this day (of the last 10 years) of 40k,
- Extent gain from minimum on this date is 447 k, which is 171 k, 27.7% less than the 10 year average of 618 k.

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

- Extent is 542 k LESS than 2021,
- Extent is 418 k MORE than 2020,
- Extent is 151 k LESS than 2018,
- Extent is 509 k LESS than 2017
- Extent is 734 k MORE than 2012
- Extent is 3,296 k LESS than the 1980’s Average
- Extent is 378 k LESS than the 2010's Average.

On average 6.3% of extent gains from minimum to maximum done, and 157 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.77 million km2, 0.11 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1096 on:** October 02, 2023, 12:54:02 PM »

NSIDC ARCTIC SEA ICE AREA (5-day trailing average): 3,161,988 KM2 as at 01-Oct-2023

- Area gain on this day 67k, which is 15 k more than the average gain on this day (of the last 10 years) of 52k,
- Area gain from minimum on this date is 493 k, which is 160 k, 24.5% less than the 10 year average of 654 k.

- Area is at position #3 in the satellite record (#1=lowest),

- Area is 747 k LESS than 2022,
- Area is 659 k LESS than 2021,
- Area is 19 k MORE than 2020,
- Area is 755 k LESS than 2017
- Area is 3,014 k LESS than the 1980’s Average
- Area is 588 k LESS than the 2010's Average
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On average 6.6% of Area gains from minimum to maximum done, and 160 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 12.38 million km2, 0.25 million km2 below the March 2016 record low maximum of 12.63 million km2, and 1st lowest in the 44 year satellite record.
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N.B. Click on image to enlarge

Juan C. García · « **Reply #1097 on:** October 03, 2023, 05:47:26 AM »

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

October 2^nd, 2023:
4,652,991 km², an increase of 69,941 km².

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

gerontocrat · « **Reply #1098 on:** October 03, 2023, 08:35:59 AM »

JAXA ARCTIC SEA ICE EXTENT: 4,652,991 KM2 as at 02-Oct-2023

- Extent gain on this day 70k which is 38 k more than the average gain on this day (of the last 10 years) of 32k,
- Extent gain from minimum on this date is 517 k, which is 134 k, 20.5% less than the 10 year average of 651 k.

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

- Extent is 560 k LESS than 2021,
- Extent is 468 k MORE than 2020,
- Extent is 82 k LESS than 2018,
- Extent is 487 k LESS than 2017
- Extent is 777 k MORE than 2012
- Extent is 3,296 k LESS than the 1980’s Average
- Extent is 341 k LESS than the 2010's Average.

On average 6.6% of extent gains from minimum to maximum done, and 156 days to maximum.

Projections. (Table JAXA-Arc1)

Average remaining extent gain (of the last 10 years) would produce a maximum in March 2024 of 13.81 million km2, 0.07 million km2 below the March 2017 record low maximum of 13.88 million km2, which would be 1st lowest in the satellite record.
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N.B. Click on image to enlarge

gerontocrat · « **Reply #1099 on:** October 03, 2023, 09:51:59 PM »

NSIDC not updated their tables for 2 Oct data yet. Getting too late for me.

News:

Author Topic: 2023 Sea ice area and extent data (Read 343588 times)