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Susan Anderson

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Re: Sea Ice Extent around Antarctica
« Reply #850 on: February 23, 2018, 06:18:25 PM »
Posted by: Sleepy « on: Today at 05:56:55 AM

Hullo Sleepy  - when do you sleep?
Sorry for that, my early mornings offended some people on my last stint in here (posting daily deltas), so I've tried hard to abstain from posting too early this time. ;)
https://forum.arctic-sea-ice.net/index.php/topic,230.msg84976.html#msg84976

Note: time posted on the forum is local. If you are several time zones away, the time posted is not about when the person is sleeping in their home location. I hope and trust the person writing that note was being humorous.

Specifically, this post appears time stamped at 6:18 when it was 12:18 (noonish) here in Boston.

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #851 on: February 23, 2018, 07:29:08 PM »
Posted by: Sleepy « on: Today at 05:56:55 AM

Hullo Sleepy  - when do you sleep?
Sorry for that, my early mornings offended some people on my last stint in here (posting daily deltas), so I've tried hard to abstain from posting too early this time. ;)
https://forum.arctic-sea-ice.net/index.php/topic,230.msg84976.html#msg84976

Note: time posted on the forum is local. If you are several time zones away, the time posted is not about when the person is sleeping in their home location. I hope and trust the person writing that note was being humorous.

Specifically, this post appears time stamped at 6:18 when it was 12:18 (noonish) here in Boston.

I am English, and old  - Greenwich Mean Time rules, OK?! (UTC is for Johnny-Came-Late)
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Alexander555

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Re: Sea Ice Extent around Antarctica
« Reply #852 on: February 23, 2018, 07:46:55 PM »
Hold on old man, your graphs are fine.

Sleepy

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Re: Sea Ice Extent around Antarctica
« Reply #853 on: February 24, 2018, 09:44:01 AM »
Posted by: Sleepy « on: Today at 05:56:55 AM

Hullo Sleepy  - when do you sleep?
Sorry for that, my early mornings offended some people on my last stint in here (posting daily deltas), so I've tried hard to abstain from posting too early this time. ;)
https://forum.arctic-sea-ice.net/index.php/topic,230.msg84976.html#msg84976

Note: time posted on the forum is local. If you are several time zones away, the time posted is not about when the person is sleeping in their home location. I hope and trust the person writing that note was being humorous.

Specifically, this post appears time stamped at 6:18 when it was 12:18 (noonish) here in Boston.
UK and Sweden is only one hour apart, Susan. The time in the UK was 04:56 and mine 05:56, that morning.

And it seems like the sea ice down there is slowly increasing.
Omnia mirari, etiam tritissima.

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #854 on: February 24, 2018, 11:33:04 AM »
Yes, Antarctic Sea Ice is increasing  - a bit below average. But with on average 15.8 million km2 (99.4%)of extent gain to go....
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #855 on: March 01, 2018, 01:15:16 PM »
JAXA ANTARCTIC SEA ICE EXTENT AT 28TH FEB 2,407,226 Km2, up 53k on the day, and 260k greater than the 2017 minimum that happened on March 1st 2017. (This was the latest date of minimum certainly since 2003).

The graph shows how in 2017 extent gains from now were generally well below the average.
The table is just a look at possibilities in 2018.

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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #856 on: March 03, 2018, 11:46:46 AM »
JAXA ANTARCTIC SEA ICE EXTENT AT 2nd March 2,457,657 Km2, up a mere 5k on the day, and 310k greater than the 2017 minimum that happened on March 1st 2017. (This was the latest date of minimum certainly since 2003).

The table is just a look at possibilities in 2018, showing how extent gain over the last 10 years would produce an extent maximum ranging from 16.55 to 18.77 million km2.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #857 on: March 08, 2018, 12:39:44 PM »
JAXA ANTARCTIC SEA ICE EXTENT AT 7th March  2,748,504  Km2, 500k greater than 2017 on that date. Nevertheless, extent gain to date is just below average, and average extent gain to maximum would result in a very low maximum.

But with 99%, 15.28 million km2 of average extent gain to go, pure speculation.



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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #858 on: March 12, 2018, 10:03:43 AM »
JAXA DATA AS AT 11th March Extent 3,119,415 km2, a jump of 236k in just two days.

Extent is now 640 k greater than 2017 on that date ( 640K - the RAM in my first twin-floppy IBM PC).

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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #859 on: March 14, 2018, 09:48:33 AM »
JAXA DATA AS AT 13th March Extent 3,352,584 km2, a jump of 233k in just two days, and 450k in 4 days.

Extent is now 797 k greater than 2017 on that date. The days when 2018 looked like it might be a new record low are but a distant memory now.
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Sleepy

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Re: Sea Ice Extent around Antarctica
« Reply #860 on: March 14, 2018, 10:42:56 AM »
Welcome back gerontocrat, that was a short holiday.  ;)
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #861 on: March 21, 2018, 01:55:35 PM »
JAXA DATA AS AT 20th March - Extent  3,843,999  km2 4th lowest of years since 2000.
863k (22.5%) greater than 2017 on that date.
What a difference since 9th Feb..

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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #862 on: March 23, 2018, 11:07:37 AM »
JAXA DATA AS AT 22 March - Extent 4,050,418 km2. 6th lowest of years since 2000.
1.012 million km2 (25%) greater than 2017 on that date.

What a difference since 9th Feb..
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #863 on: March 24, 2018, 09:43:59 AM »
JAXA DATA Extent 4,217,770 km2(March 23, 2018)

So much for my speculations about a sea change to Antarctic sea ice extent.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #864 on: March 25, 2018, 10:14:31 AM »
JAXA Antarctic Sea Ice Extent - 4,347,235 km2(March 24, 2018)

Up 503,000 km2 in four days.
Extent gain to date 250,000 above average with just 6% of average extent gain done.
Extent is 27.6%   1,199,522 km2 above 2017 on this date.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #865 on: April 05, 2018, 03:16:29 PM »
JAXA DATA as at 4 April


Something odd has happened in the Antarctic since my last posting on the 25th March. Extent gain has slowed dramatically. Extent is now 0.97 million km2 greater than 2017 compared with 1.3 million about one week ago.
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crandles

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Re: Sea Ice Extent around Antarctica
« Reply #866 on: April 06, 2018, 12:12:39 AM »
Antarctica 'gives ground to the ocean'
http://www.bbc.co.uk/news/science-environment-43627673

Re grounding line retreat

Quote
The new data-set confirms other observations that show the mighty Pine Island Glacier, one of the biggest and fast-flowing glaciers on Earth, and whose grounding line had been in major retreat since the 1940s, appears now to have stabilised somewhat.

The line is currently going backwards by only 40m/yr compared with the roughly 1,000m/yr seen in previous studies. This could suggest that ocean melting at the PIG's base is pausing.

Its next-door neighbour, Thwaites Glacier, on the other hand, is seeing an acceleration in the reversal of its grounding line - from 340m/yr to 420m/yr.

oops probably wrong thread, it isn't sea ice.

gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #867 on: April 11, 2018, 01:36:55 PM »
JAXA ANTARCTIC EXTENT AS AT 10 APRIL 5,595,075 km2

Since 4 April, Antarctic sea ice extent gain has gone up to about normal again. However, the difference between 2108 and 2017 has reduced to + 0.84 million from + 0.97 million on 4 April.

On average, 22.5% of extent gain is done already (cf. with Arctic where just 6 percent of extent loss is done by this date)_.

A new minimum maximum remains a possibility.

ps: The post by Crandles above (oops, wrong thread) is nevertheless a timely reminder that the sea ice is essentially a side-show - it is what lies beneath that is really, really, scary.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #868 on: April 14, 2018, 11:02:50 AM »
JAXA DATA AS AT 13 APRIL 5,722,792 km2

Extent gain continues below average, 2018 extent now 0.67 million above 2017.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #869 on: April 17, 2018, 10:58:12 AM »
JAXA DATA - EXTENT 6,006,463 km2 April 16, 2018

Extent crossed the 6 million km2 mark 5 days before 2017. However, 2018 extent is just 0.57 million km2 > 2017 cf 1.3 million km2 on March 28.

Extent gain is, on average (last 10 years) 27% done. A record low maximum of well below 18 million km2 remains a real possibility.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #870 on: April 20, 2018, 08:49:28 AM »
JAXA EXTENT DATA -  6,199,027 km2(April 19, 2018)

On average, extent gain is 29% done, and is 630,000 km2 less than average to date.
2018 is now 477,000 km2 obove 2017 compared with 1,300,000 in late March.

If history is a guide, 2018 is heading for a record low maximum of around 17.5 million km2. 8 out of 10 of the last 10 years say definitely a record low maximum. I am surprised.

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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #871 on: April 21, 2018, 09:21:42 AM »
JAXA EXTENT DATA -  6,249,724 km2(April 20, 2018)

I am surprised again by the continued slow increase in extent..

On average, extent gain is 30% done, and is 700,000 km2 (15%) less than the average to date.
2018 is now 377,000 km2 above 2017 compared with 477,000 the day before and 1,300,000 in late March.

If history is a guide, 2018 is heading for a record low maximum of around 17.4 million km2. 8 out of 10 of the last 10 years agree.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #872 on: April 23, 2018, 01:54:18 PM »
JAXA EXTENT DATA -  6,417,382 km2(April 22, 2018

In the last two days extent gain has returned to average, but well below that of 2017. As a result, 2018 is now just 241,000 km2 above 2017 compared with 377,000 km2 on the 20 April and 1,300,000 in late March.


On average, extent gain is 31% done, and is 710,000 km2 (15%) less than the average to date. If history is a guide, 2018 is heading for a record low maximum of around 17.4 million km2. 8 out of 10 of the last 10 years agree.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #873 on: April 25, 2018, 11:04:46 AM »
JAXA EXTENT DATA -  6,598,767 km2(April 24, 2018)

Extent gain has returned to below average, and well below that of 2017. As a result, 2018 is now just 185,000 km2 above 2017 compared with 1,300,000 in late March.

On average, extent gain is 32% done, and is an impressive 760,000 km2 (15%) less than the average to date. If history is a guide, 2018 is heading for a record low maximum of around 17.4 million km2. 8 out of 10 of the last 10 years agree. Even if remaining extent gain turns out  at the maximum of the last 10 years, the 2018 maximum would be 18.4 million km2, the third lowest in the satellite record.

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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #874 on: April 26, 2018, 07:52:34 AM »
JAXA EXTENT -  6,658,662 km2(April 25, 2018)

Extent gain has returned to below average, and well below that of 2017. As a result, 2018 is now just 152k km2 above 2017 compared with 1.3 million km2 in late March.

On average, extent gain is 33% done, and is an even more impressive 830,000 km2 (16%) less than the average to date. If history is a guide, 2018 is heading for a record low maximum of  about 17.3 to 17.4 million km2. 8 out of 10 of the last 10 years agree. Even if remaining extent gain turns out  at the maximum of the last 10 years, the 2018 maximum would be 18.4 million km2, the third lowest in the satellite record.

It is difficult not to see 2018 at the lowest extent in the satellite record by May 1st
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #875 on: April 27, 2018, 10:28:39 AM »
JAXA EXTENT -  6,709,490 km2(April 26, 2018)

Extent gain has remains well below average, and well below that of 2017. As a result, 2018 is now just 94k km2 above 2017 compared with 1.3 million km2 in late March.

On average, extent gain is 34% done, and is an even more impressive 880,000 km2 (16%) less than the average to date. If history is a guide, 2018 is heading for an even lower record low maximum of  about 17.2 to 17.3 million km2. Even if remaining extent gain turns out to be at the maximum of the last 10 years, the 2018 maximum would be 18.23 million km2, just 0.17 million km2 above 2017, the lowest in the satellite record.

It is difficult not to see 2018 at the lowest extent in the satellite record by May 1st
[/quote]
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #876 on: April 29, 2018, 10:11:44 AM »
JAXA EXTENT -  6,709,490 km2(April 26, 2018)

Extent gain has remained well below average, and well below that of 2017, except for 28 April - up by 122k. Nevertheless, 2018 is now just 62k km2 above 2017 compared with 1.3 million km2 in late March.

On average, extent gain is 35% done, and is 870,000 km2 (16%) less than the average to date. If history is a guide, 2018 is heading for an even lower record low maximum of  about 17.2 to 17.3 million km2. Even if remaining extent gain turns out to be at the maximum of the last 10 years, the 2018 maximum would be between 18.2 and 18.3 million km2, about 0.2 million km2 above 2017, the lowest in the satellite record.

Will 2018 be at the lowest extent in the satellite record by May 1st - 50/50?
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #877 on: May 03, 2018, 03:11:08 PM »
JAXA EXTENT -  7,403,283 km2(May 2, 2018)

From 28 April extent gain has been at 100k or +100k. As a result, extent is 169k above 2017 though still lowest (since 2000 at any rate.

On average, extent gain is 35% done, and is 550,000 km2 (13%) less than the average to date. Despite the recent large extent gains, if history is a guide, 2018 is still  heading for a record low maximum of  about 17.2 to 17.3 million km2. Even if remaining extent gain turns out to be at the maximum of the last 10 years, the 2018 maximum would be between 18.2 and 18.3 million km2, about 0.2 million km2 above 2017, the lowest in the satellite record.

Was 2018 be at the lowest extent in the satellite record by May 1st - NO?
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DavidR

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Re: Sea Ice Extent around Antarctica
« Reply #878 on: May 05, 2018, 06:26:58 AM »
Antarctic Extent on May 3rd,  is back to just 74K km^2 above 2017 and global extent is lowest by about 110K.

Interesting to see that according to NOAA-ESRL figures, April was the hottest on record for the Antarctic by more than 1 degree for both  SST  and AirTemperaatutes. This is bigger than the gap between the second placed year and the eleventh placed year. This suggests that the southern ocean is a whole lot warmer than usual and continued low increases in extent are likely.  Checking the figures the oceans between 45S and 67S were hottest on record for April and 4/10ths hotter than 2017. So there is a lot of warmish water out there ready to slow down the extent increase,
« Last Edit: May 05, 2018, 06:34:34 AM by DavidR »
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #879 on: May 09, 2018, 12:30:59 PM »
JAXA EXTENT 8,268,275 km2(May 8, 2018)

Two double century extent increases (May 5 and 6) changed things somewhat. Extent is now 319k km2 above 2017.  Despite this a record low maximum of 17.5 million km2 is still the average forecast.

BUT (there is always a but) just 42% of extent gain done on average and the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #880 on: May 11, 2018, 10:58:04 AM »
JAXA EXTENT 8,441,995 km2(May 10, 2018)

Extent gains below average for the last two days. Extent is now down to 258k km2 above 2017.  A record low maximum of 17.5 million km2 is still the average forecast.

BUT (there is always a but) just 43% of extent gain done on average and the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #881 on: May 13, 2018, 11:51:54 AM »
JAXA EXTENT 8,751,299 km2(May 12, 2018)

Extent gains switched to well above average over the last two days. Extent is now 276k km2 above 2017.  A record low maximum of 17.55 million km2 is still the average forecast.

BUT (there is always a but) just 45% of extent gain done on average and the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #882 on: May 17, 2018, 12:21:10 PM »
JAXA EXTENT 9,332,206 km2(May 16, 2018)

Extent gains switched to well above average over the last six days, averaging 150k per day. Extent is now 298k km2 above 2017.  A record low maximum of 17.67 million km2 is still the average forecast.

BUT (there is always a but) just 48% of extent gain done on average and the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #883 on: May 19, 2018, 01:02:55 PM »
JAXA EXTENT 9,524,493 km2(May 18, 2018)

Extent gains switched to well above average over the previous six days, averaging 150k per day, but on 18th May moderated to 86k. Extent is now 239k km2 above 2017.  A record low maximum of 17.68 million km2 is still the average forecast.

BUT (there is always a but) just 49% of extent gain done on average and the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #884 on: May 23, 2018, 06:20:55 PM »
JAXA EXTENT 10,187,201 km2(May 22, 2018)

Extent gains switched again to well above average. Extent has now shot up to 611k km2 above 2017.  A record low maximum of 17.94 million km2 is still the average forecast with 51% of the season done, but is looking less likely.

BUT (there is always a but) the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #885 on: May 28, 2018, 09:19:57 AM »
JAXA EXTENT 10,487,675 km2(May 27, 2018)

Extent gains switched again to well below average. Extent is still  434k km2 above 2017.  A record low maximum of 17.72 million km2 is the average forecast with 55% of the season done.

BUT (there is always a but) the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #886 on: June 01, 2018, 11:17:11 AM »
JAXA EXTENT 10,972,415 km2(May 31, 2018)

Extent gains switched again to well above average. Extent is 376k km2 above 2017.  A record low maximum of 17.81 million km2 is the average forecast with 57% of the season done.

BUT (and there is always a but) the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #887 on: June 08, 2018, 11:34:31 AM »
JAXA EXTENT 11,755,202 km2(June 7, 2018)

Extent gains a case of ups and downs. Extent is 169k km2 above 2017.  A record low maximum of 17.81 million km2 is the average forecast with 62% of the season done.

BUT (and there is always a but) the Antarctic is somewhat unpredictable.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #888 on: June 15, 2018, 10:44:57 AM »
JAXA EXTENT 12,767,523 km2(June 14, 2018)

Extent gains a case of more ups than downs compared with the average.
Extent is 550k km2 (4.3%) above 2017. 

A maximum of 18.1 million km2 - 2nd lowest -is the average forecast with 66% of the season's average extent gain done.
Range of outcomes over the last 10 years using remaining melt is 17.1 to 18.8 million km2.
On average 94 days to maximum.

BUT (and there is always a but) the Antarctic is somewhat unpredictable.
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sidd

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Re: Sea Ice Extent around Antarctica
« Reply #889 on: June 17, 2018, 12:30:45 AM »
In the latest from Nature , Massom et al. have a paper that details the protective effect of sea ice on ice shelves which may be of some interest here. I describe it here:

https://forum.arctic-sea-ice.net/index.php/topic,622.msg159219.html#msg159219

sidd

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Re: Sea Ice Extent around Antarctica
« Reply #890 on: July 02, 2018, 12:13:32 PM »
JAXA EXTENT 14,485,005 km2(July 1, 2018)

Extent gains a case of more ups than downs compared with the average.
Extent is 771k km2 (5.3%) above 2017. 

A maximum of 18.28 million km2 - 2nd lowest -is the average forecast with 76% of the season's average extent gain done.
Range of outcomes over the last 10 years using remaining melt is 17.4 to 18.9 million km2.
On average 77 days to maximum.
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Re: Sea Ice Extent around Antarctica
« Reply #891 on: July 08, 2018, 08:33:08 AM »
JAXA EXTENT 14,976,217 km2(July 7, 2018)

Extent gains a case of more ups than downs compared with the average.
Extent is 580 k km2 (5.3%) above 2017, and 4th lowest in the satellite record.

A maximum of 18.28 million km2 - 2nd lowest -is the average forecast with 79% of the season's average extent gain done.
Range of outcomes over the last 10 years using remaining melt is 17.34 to 19.1 million km2.
On average 71 days to maximum.

Antarctic Sea Ice is often dismissed of little importance in the grand scheme of things. The following is a quote from the June 2018 sea ice analysis from NSIDC.

Quote
Antarctica’s sea ice and ice shelf disintegration
A new study in the Journal Nature found that reduced sea ice in the northwestern Weddell Sea and southern Bellingshausen Sea likely contributed to the weakening of major ice shelves prior to their disintegration in the 1990s and early 2000s. Loss of the sea ice buffer near Antarctica’s coast allows long-period ocean swell to flex ice shelves. Under ordinary conditions, this flexing has little effect. However, if the ice shelves have been pre-conditioned by seasonal melt-water flooding, the flexing by wave action in late summer can have a devastating effect. Minor flexure of the ice shelf plate allows water to infiltrate existing cracks and initiate fracturing of the ice.

Four major ice shelf break-up events in 1995 (Larsen A), 2002 (Larsen B), and 2008 and 2009 (Wilkins) all occurred after multiple weeks where no sea ice was present near the ice shelf fronts to dampen ocean swell. In the case of the Larsen A and B events, the loss of the ice shelves initiated a significant acceleration of the tributary glaciers. The study demonstrates that sea ice—a component of the cryosphere that is very sensitive to changing climate and ocean—has an important protective effect on the Antarctic ice sheet.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #892 on: July 10, 2018, 08:41:12 AM »
JAXA EXTENT 15,180,115 km2(July 9, 2018)

Extent gains a case of more ups than downs compared with the average.
Extent is 665 k km2 (4.4%) above 2017, and 4th lowest in the satellite record.

A maximum of 18.36 million km2 - 2nd lowest -is the average forecast with 80% of the season's average extent gain done.
Range of outcomes over the last 10 years using remaining melt is 17.40 to 19.15 million km2.
On average 69 days to maximum.

Antarctic Sea Ice is often dismissed of little importance in the grand scheme of things. The following is a quote from the June 2018 sea ice analysis from NSIDC.

Quote
Antarctica’s sea ice and ice shelf disintegration[/b]
Four major ice shelf break-up events in 1995 (Larsen A), 2002 (Larsen B), and 2008 and 2009 (Wilkins) all occurred after multiple weeks where no sea ice was present near the ice shelf fronts to dampen ocean swell. In the case of the Larsen A and B events, the loss of the ice shelves initiated a significant acceleration of the tributary glaciers. The study demonstrates that sea ice—a component of the cryosphere that is very sensitive to changing climate and ocean—has an important protective effect on the Antarctic ice sheet.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #893 on: July 17, 2018, 02:08:58 PM »
JAXA EXTENT  15,584,261 km2(July 16, 2018)

Extent gains in the last 7 days very much on the average.
Extent is 570 k (4.4%) above 2017, and 4th (?) lowest in the satellite record.

A maximum of 18.30 million km2 - 2nd lowest -is the average forecast with 83% of the season's average extent gain done.
Range of outcomes over the last 10 years using remaining melt is 17.60 to 19.03 million km2.
On average 62 days to maximum.

Antarctic Sea Ice is often dismissed of little importance in the grand scheme of things. The following is a quote from the June 2018 sea ice analysis from NSIDC.

Quote
Antarctica’s sea ice and ice shelf disintegration[/b]
.... sea ice—a component of the cryosphere that is very sensitive to changing climate and ocean—has an important protective effect on the Antarctic ice sheet.
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gerontocrat

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Re: Sea Ice Extent around Antarctica
« Reply #894 on: Today at 10:43:54 AM »
JAXA EXTENT  15,815,536 km2(July 20, 2018)

Extent gains in the last 7 days very much on or a bit below the average.
Extent increase is down to just 236 k (1.5 %) above 2017, and 3rd (?) lowest in the satellite record.

A maximum of 18.27 million km2 - 2nd equal lowest -is the average forecast with 85% of the season's average extent gain done.
Range of outcomes over the last 10 years using remaining melt is 17.63 to 18.81 million km2.
On average 58 days to maximum.

Antarctic Sea Ice is often dismissed of little importance in the grand scheme of things. The following is a quote from the June 2018 sea ice analysis from NSIDC.

Quote
Antarctica’s sea ice and ice shelf disintegration[/b]
.... sea ice—a component of the cryosphere that is very sensitive to changing climate and ocean—has an important protective effect on the Antarctic ice sheet.
[/quote]
"Para a Causa do Povo a Luta Continua!"