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Messages - Juan C. García

Pages: [1] 2 3 ... 16
1
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: November 16, 2020, 04:52:53 AM »
I love you folks. Just wanted to say that. Thanks.
:)

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

November 15th, 2020:
     8,703,052 km2, an increase of 15,071 km2:o
     2020 is 2nd lowest on record.
     In the graph are today's 12 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

2
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: November 15, 2020, 04:53:01 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 14th, 2020:
     8,687,981 km2, an increase of 95,308 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 12 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

3
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: November 12, 2020, 05:04:50 AM »
Hi Gero & Juan

You can kill me for this, but just wondering if there is any possibility the choice of colour schemes for key individual years could be harmonised on the Jaxa extent graphs ?

E.g. I was looking at what's ahead on Gero's extent graph and saw the big green dip ahead. My eyesight on phone isnt great and thought it was 2012 and only when zoomed in I realised Juan uses green for 2012 and Gero uses green for 2016.

If this is too problematic, it doesnt matter but thought it would be useful to have one or two key years the same colour.

Btw thanks for all your timely updates. I am one of the many who check in every day.  :)

Hi Niall.

There is no problem with your question.

I use the graph capabilities that ADS VISHOP give us on their chart when you select the 2000-2020 years view. I change the colors a little, but not too much. By example, I change 2016 to orange, because I do not like the yellow that they used. I highlight some years to have a better view and I work the graph with Paint, just to give a closer look of the chart and to save some data space on the Forum server.

Other than that, I try to avoid too many changes, because I repeat this work every night and because on the melting season, the Forum users look to have the information as soon as possible.

On the other hand, I do not know how the ADS VISHOP standard in a couple of months will be, when they start including 2021.

So, I prefer to keep the colors that I use now.

4
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: November 11, 2020, 04:35:46 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 9th, 2020:
     8,284,105 km2, a century break increase of 153,116 km2.

November 10th, 2020:
     8,369,720 km2, an increase of 85,615 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 11 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

5
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: November 05, 2020, 05:35:28 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 4th, 2020:
     7,659,839 km2, an almost double century break increase of 192,347 km2.
     2020 is 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

6
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: November 03, 2020, 04:35:29 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 2nd, 2020:
     7,268,936 km2, a double century break increase of 276,748 km2.
     2020 is now 2nd lowest on record.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

7
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: November 02, 2020, 04:39:33 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

November 1st, 2020:
     6,992,188 km2, a double century break increase of 212,659 km2.
     2020 is the lowest on record on this date.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

8
Arctic sea ice / Re: The 2020/2021 freezing season
« on: November 01, 2020, 05:30:31 AM »
I've no idea how the unprecedented current anomaly will play out but it is a good stand-in for a tipping point and imminent climate emergency -- and the experts are certainly taking it that way. It is definitely the biggest thing we've seen since the 2007 minimum and GAAC 2012.

The forum event response?  Apathy, tl;dr, bury the message, copy/paste the same old same old like it was 2013. And this is a very interested micro-demographic! It seems wake-up calls don't wake anybody any more ... if so, climate chaos won't end with a bang but a brain-fog whimper.

I am so shocked by what has happened, that I am not doing anything! But in a way, I feel that, even that I should do something on this Forum, the strongest action should be focus on the general public, on people that are not aware of what it’s happening in the Arctic.

9
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: November 01, 2020, 04:36:18 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 31st, 2020:
     6,779,529 km2, a double century break increase of 231,104 km2.
     2020 is the lowest on record on this date.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

10
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 30, 2020, 04:36:41 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 29th, 2020:
     6,263,660 km2, a double century break increase of 247,970 km2.
     2020 is the lowest on record on this date.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

11
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 29, 2020, 04:40:01 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 28th, 2020:
     6,015,690 km2, a century break increase of 132,413 km2.
     2020 is the lowest on record on this date.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

12
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 28, 2020, 04:32:16 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 27th, 2020:
     5,883,277 km2, a century break increase of 114,107 km2.
     2020 is the lowest on record on this date.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum on September.
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

2020: 942K km2 versus 2016 (2nd lowest). That is a huge difference!!!

13
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 25, 2020, 04:31:53 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 24th, 2020:
     5,481,384 km2, a century break increase of 144,110 km2.
     2020 is the lowest on record on this date.
     In the graph are today's 10 lowest years.
     Highlighted the 5 years with daily lowest minimum that happened on:
         1) Sep 16th, 2012: 3.18  (million km2).
         2) Sep 13th, 2020: 3.55
         3) Sep 17th, 2019: 3.96
         4) Sep   7th, 2016: 4.02
         5) Sep 17th, 2007: 4.07
   
Source: https://ads.nipr.ac.jp/vishop/#/extent.

14
Great news, DavidR!  :)
In fact, they already made the correction on their page!

Thank you, Dr. Zhang and PIOMAS team!
http://psc.apl.uw.edu/research/projects/arctic-sea-ice-volume-anomaly/

15
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 24, 2020, 05:35:11 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 23rd, 2020:
     5,337,274 km2, an increase of 74,167 km2.
     2020 is the lowest on record on this date.
     Highlighted the 5 years with a daily lowest min in September. In million km2:
     [ 1) 2012: 3.18,  2) 2020: 3.55,  3) 2019: 3.96,  4) 2016: 4.02  &  5) 2007: 4.07 ].
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

16
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 23, 2020, 07:17:53 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

On the following days, 2019 is going to have several increases of more than 200K km2. As a result, on October 27th, the year 2016 starts having the lead as the lowest on record.

For 2020 to have a difference of less than one million km2 versus 2016, 2020 needs to have an average increase of more than 112.5K km2 until August October 27.

Will 2020 have this average increase? If it does not have it, then on August October 27th, the year 2020 will be more than one million km2 lower than any other year on record.

Edit:
October** JCG
Thanks

17
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 23, 2020, 05:36:23 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 22nd, 2020:
     5,263,107 km2, an increase of 70,966 km2.
     2020 is the lowest on record on this date.
     Highlighted the 5 years with a daily lowest min in September. In million km2:
     [ 1) 2012: 3.18,  2) 2020: 3.55,  3) 2019: 3.96,  4) 2016: 4.02  &  5) 2007: 4.07 ].
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

18
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 22, 2020, 05:40:26 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 21st, 2020:
     5,192,141 km2, an increase of 64,390 km2.
     2020 is the lowest on record on this date.
     Highlighted the 5 years with a daily lowest min in September. In million km2:
     [ 1) 2012: 3.18,  2) 2020: 3.55,  3) 2019: 3.96,  4) 2016: 4.02  &  5) 2007: 4.07 ].
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

P.S. If 2020 does not have an average daily increase of 106K km2 from tomorrow to October 27th, then 2020 will have a million [or more] km2 less than any other year since 1979 (on October 27th).

19
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 21, 2020, 05:38:03 AM »
Words aren't adequate.
Thank you for the comment.  ;)

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

October 20th, 2020:
     5,127,751 km2, an increase of 61,600 km2.
     2020 is the lowest on record on this date.
     Highlighted the 5 years with a daily lowest min in September. In million km2:
     [ 1) 2012: 3.18,  2) 2020: 3.55,  3) 2019: 3.96,  4) 2016: 4.02  &  5) 2007: 4.07 ].
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

Almost half a million km2 less than 2019 and more than a million km2 less versus 2012, 2016 and 2007!  :o

20
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 20, 2020, 05:40:41 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 19th, 2020:
     5,066,151 km2, an increase of 66,461 km2.
     2020 is the lowest on record on this date.
     Highlighted the 5 years with a daily lowest min in September. In million km2:
     [ 1) 2012: 3.18,  2) 2020: 3.55,  3) 2019: 3.96,  4) 2016: 4.02  &  5) 2007: 4.07 ].
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

This is truly uncharted territory!
900K+ km2 versus 2007 & 2016; 1+ million km2 versus 2012.

21
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 19, 2020, 05:39:02 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 18th, 2020:
     4,999,690 km2, an increase of 40,667 km2.
     2020 is the lowest on record on this date.
     Highlighted the 5 years with a daily lowest min in September. In million km2:
     [ 1) 2012: 3.18,  2) 2020: 3.55,  3) 2019: 3.96,  4) 2016: 4.02  &  5) 2007: 4.07 ].
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

22
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 18, 2020, 05:33:00 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 17th, 2020:
     4,959,023 km2, an increase of 30,058 km2.
     2020 is the lowest on record on this date.
     Highlighted the 5 years with a daily lowest min in September. In million km2:
     [ 1) 2012: 3.18,  2) 2020: 3.55,  3) 2019: 3.96,  4) 2016: 4.02  &  5) 2007: 4.07 ].
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

23
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 17, 2020, 06:00:03 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 16th, 2020:
     4,928,965 km2, a drop of -9,602 km2:o
     2020 is the lowest on record on this date.
     Highlighted the 5 years with a daily lowest min in September. In million km2:
     [ 1) 2012: 3.18,  2) 2020: 3.55,  3) 2019: 3.96,  4) 2016: 4.02  &  5) 2007: 4.07 ].
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

24
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 16, 2020, 05:35:02 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 15th, 2020:
     4,938,567 km2, an increase of 32,886 km2.
     2020 is the lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

25
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 15, 2020, 05:34:56 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 14th, 2020:
     4,905,681 km2, an increase of 81,308 km2.
     2020 is the lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

26
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 13, 2020, 05:34:56 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 12th, 2020:
     4,744,432 km2, a century break increase of 107,569 km2.
     2020 is the lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

27
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 12, 2020, 05:50:31 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 11th, 2020:
     4,636,863 km2, an increase of 89,336 km2.
     2020 is the lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

28
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 11, 2020, 05:39:47 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 10th, 2020:
     4,547,527 km2, an increase of 75,220 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

29
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 08, 2020, 06:28:13 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 7th, 2020:
     4,359,627 km2, an increase of 36,880 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

30
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 07, 2020, 05:35:55 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 6th, 2020:
     4,322,747 km2, an increase of 46,559 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

31
Science / Re: Where are we now in CO2e , which pathway are we on?
« on: October 07, 2020, 12:27:07 AM »
To finalize my update on greenhouse gases here is the summary of the four postings in the individual gas concentration threads.

More radiative forcing of the "NOAA gases" (CO2, CH4, N2O, SF6) in June 2020 than in June 2019, but less than in May 2020, because CO2 and CH4 reach their seasonal maximum in May.

The values [W/m²], change to May 2020 and change to June 2019:
CO2 2.161    (- 0.009)    (+ 0.031)   
CH4 0.519    (- 0.001)    (+ 0.005)
N2O 0.205   (+ 0.000)    (+ 0.003)
SF6  0.0053 (+ 0.0000)  (+ 0.0001)
sum  2.891  (- 0.009)   (+ 0.040) (rounding differences)

The relative annual increase is 1.43 %, a little bit higher than May 2020.
Thanks for your posts, Stephan.  :)
Is there a way to change the final value to CO2e, in ppm?
And a way to compare the sum of them with what we have, by example, versus 1980?

32
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 05, 2020, 05:35:30 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 4th, 2020:
     4,223,302 km2, an increase of 17,665 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

33
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 04, 2020, 05:30:55 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 3rd, 2020:
     4,205,637 km2, an increase of 20,905 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

34
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 03, 2020, 05:31:20 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 2nd, 2020:
     4,184,732 km2, an increase of 20,076 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

35
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: October 02, 2020, 05:33:16 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

October 1st, 2020:
     4,164,656 km2, an increase of 24,445 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent.

36
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 25, 2020, 05:32:39 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

September 24rd, 2020:
     3,932,519 km2, an increase of  63,552 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 11 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

37
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 24, 2020, 05:33:45 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

September 23rd, 2020:
     3,868,967 km2, an increase of 55,214 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

38
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 23, 2020, 07:10:58 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

September 22nd, 2020:
     3,813,753 km2, an increase of  62,775 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

39
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 22, 2020, 05:37:01 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

September 21st, 2020:
     3,750,978 km2, an increase of 27,707 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

40
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 21, 2020, 05:34:59 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

September 20th, 2020:
     3,723,271 km2, a small drop of -315 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

41
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 20, 2020, 05:39:38 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

September 17th, 2020:
     3,734,834 km2, a 100K+ increase of 104,616 km2. (confirmed)
September 18th, 2020:
     3,745,309 km2, an increase of 10,475 km2.

September 19th, 2020:
     3,723,586 km2, a drop of -21,723 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

42
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 18, 2020, 05:32:19 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

September 17th, 2020:
     3,734,834 km2, a 100K+ increase of 104,616 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

P.S. The melting season is officially over!  ;)

43
Arctic sea ice / Re: What's new in the Arctic ?
« on: September 17, 2020, 08:40:03 PM »
    Nice catch Juan.
The truth is that I read it first in NSIDC Analysis. I have to acknowledge them.

Quote
A recent paper by an international group led by political geographer Mia Bennett at the University of Hong Kong discusses the potential impacts of the near-future emergence of a transpolar shipping route as sea ice retreat continues to open a very wide shipping lane along the Eurasian side of the Arctic Ocean (as it has this year). The route would pass over the North Pole as a way of avoiding an extensive Russian exclusive economic zone (EEZ) and still-contended continental shelf claim.

This emerging transpolar route reflects a fundamentally changed Arctic environment. Another recent paper by researchers Laura Landrum and Marika Holland at the National Center for Atmospheric Research found that the Arctic has indeed entered into a “new Arctic climate” state. This new climate is one characterized by warmer temperatures, more open water, less sea ice, more rain, and less snow. In the Arctic, weather that used to be considered extreme is becoming the norm. The summer of 2020 is clearly representative of this new Arctic.
http://nsidc.org/arcticseaicenews/2020/09/suddenly-in-second-place/

44
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 17, 2020, 05:33:09 AM »
[ADS NIPR VISHOP (JAXA)] Arctic Sea Ice Extent.

September 16th, 2020:
     3,630,218 km2, an increase of 24,861 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

45
Arctic sea ice / Re: 2020 Sea ice area and extent data
« on: September 16, 2020, 05:36:36 AM »
As a long time lurker and persistent reader of this forum, I think it appropriate at this time to especially thank Oren, Juan C. Garcia, Frivolousz21, Jim Hunt, Born From The Void, Aluminum, A-Team, ArcticMelt2, Gerontocrat, and other participants on the ASIF for their continued outstanding analyses of the Arctic environment.  I also want to thank Neven for making this all possible as well. For people like me publishing these analyses in the concise and straightforward manner is a godsend for us.  The lack of garbage and political interference is indeed refreshing. So, "Thank You" to everyone.....

VaughnAn

Agreed.

You are welcome! and 1+ thanks to everyone else!!!  :)

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

September 15th, 2020:
     3,605,357 km2, an increase of 23,341 km2.
     2020 is 2nd lowest on record on this date.
     Highlighted 2020 & the 4 years with a daily lowest min in Sept. (2012, 2019, 2016 & 2007).
     In the graph are today's 10 lowest years.
     Source: https://ads.nipr.ac.jp/vishop/#/extent

46
Antarctica / Re: Thwaites Glacier Discussion
« on: September 15, 2020, 07:10:23 PM »
https://www.pnas.org/content/early/2020/09/08/1912890117

Quote
In the future, this mechanical weakening and increased velocity gradients due to loss of frictional gradients at the ice shelf margins are not expected to trigger negative feedbacks that counterbalance the damage as damage healing is expected only for negative maximum strain rates, which are limited for ice shelves (38). As such, it is different from other ice shelf weakening processes such as surface or subshelf melt as these can be counterbalanced by changes in atmospheric or oceanic processes, which are prone to climatic variability (3⇓–5). Therefore, the damage process and mechanical weakening in the shear zones have similar far-reaching consequences for ice shelf stability as localized ice shelf thinning in basal channels (27, 39). This sensitivity suggests that incorporating damage processes in future ice sheet models in combination with accurate knowledge of ocean forcing, bathymetry, bedrock topography, ice velocity, and surface melt is crucial to assess the future sea level contributions from major Antarctic glaciers.

What it means to me, with my very limited knowledge, is that we (humanity) cannot yet assess the sea level rise that we will face at the end of the 21st century, with this high-speed anthropogenic global warming.

But only one meter I consider it very unlikely. It is less than 1.8% of the possible total melt of 56-60 meters, with Greenland facing an ice-free Arctic on 2035 or earlier (65+ years receiving heat).

47
Antarctica / Re: Thwaites Glacier Discussion
« on: September 15, 2020, 06:50:56 PM »
Damage accelerates ice shelf instability and mass loss in Amundsen Sea Embayment
Stef Lhermitte, Sainan Sun, Christopher Shuman, Bert Wouters, Frank Pattyn, Jan Wuite, Etienne Berthier, and Thomas Nagler
https://doi.org/10.1073/pnas.1912890117

Abstract
Pine Island Glacier and Thwaites Glacier in the Amundsen Sea Embayment are among the fastest changing outlet glaciers in West Antarctica with large consequences for global sea level. Yet, assessing how much and how fast both glaciers will weaken if these changes continue remains a major uncertainty as many of the processes that control their ice shelf weakening and grounding line retreat are not well understood. Here, we combine multisource satellite imagery with modeling to uncover the rapid development of damage areas in the shear zones of Pine Island and Thwaites ice shelves. These damage areas consist of highly crevassed areas and open fractures and are first signs that the shear zones of both ice shelves have structurally weakened over the past decade. Idealized model results reveal moreover that the damage initiates a feedback process where initial ice shelf weakening triggers the development of damage in their shear zones, which results in further speedup, shearing, and weakening, hence promoting additional damage development. This damage feedback potentially preconditions these ice shelves for disintegration and enhances grounding line retreat. The results of this study suggest that damage feedback processes are key to future ice shelf stability, grounding line retreat, and sea level contributions from Antarctica. Moreover, they underline the need for incorporating these feedback processes, which are currently not accounted for in most ice sheet models, to improve sea level rise projections.

https://www.pnas.org/content/early/2020/09/08/1912890117

48
Antarctica / Re: Thwaites Glacier Discussion
« on: September 15, 2020, 06:42:36 PM »
Quote
Two major Antarctic glaciers are tearing loose from their restraints, scientists say
Pine Island and Thwaites glaciers already contribute 5 percent of sea-level rise.
By Chris Mooney
September 14, 2020 at 2:03 p.m. CDT

“The stresses that slow down the glacier, they are no longer in place, so the glacier is speeding up,” said Stef Lhermitte, a satellite expert at Delft University of Technology in the Netherlands who led the new research along with colleagues from NASA and other research institutions in France, Belgium, Austria and the Netherlands.
https://www.washingtonpost.com/climate-environment/2020/09/14/glaciers-breaking-antarctica-pine-island-thwaites/

49
Arctic sea ice / Re: The 2020 melting season
« on: September 15, 2020, 04:26:13 PM »
I think the profound thing here is that we have now had two low, almost record breaking minimums in a row. In recent history we have had one low year about every 5 or 6 years. This is different!

In my perception, that is not completely true. 2005 was a terrible year, compared with the previous years. And until the middle of July, the year 2006 seem to be worst than 2005. At September it did not happened, but September 2006 was worse than any previous year, except for 2005. Then we have the huge drop of 2007. So, three bad years in a row.

On the other hand, Bremen said that on daily basis, 2011 broke the 2007 record. 2011 start to refreeze early, so on NSIDC average, September 2011 was not that bad. But it was a bad year if you look it in detail. And then it came 2012.

Finally, 2016 was a bad year in extent and 2017 was an awfully bad year in volume until July.

My perception is that we have just been lucky in summer weather in years like 2006, 2011 and 2017. But the tendency is the tendency and we are going to have new records and a BOE, unless something unexpected happens, like we have a huge amount of fresh water that really slows the AMOC.

So 2019 and 2020 are two bad years in a row, but it happened before.

50
Arctic sea ice / Re: The 2020 melting season
« on: September 15, 2020, 05:56:03 AM »
It is impressive that we are still losing ice within the 85°N parallel.

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