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Old June 28th 17, 03:58 PM posted to uk.sci.weather
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Default Global sea ice

On 15/06/2017 17:08, JohnD wrote:
See that there's some speculation that we might be heading for the
lowest sea ice extent _maximum_ in the recent record (at least as far as
the first (July) max of the year is concerned - last year the second
(Nov) max was no greater than the first). See eg:

https://sites.google.com/site/arctis...t_byyear_b.png



Is that plot starting to fall away?
Despite Arctic temp anomaly, via GFS , going negative and lack of
storminess.
Has Larsen C broken away at the other end?
Day-of-the-year global sea-ice anomaly deficit metric going strongly
negative.
2 days ago -2.287 x10^6 km^2
yeaterday -2.336

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Old June 28th 17, 08:55 PM posted to uk.sci.weather
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On Wednesday, 28 June 2017 16:58:28 UTC+1, N_Cook wrote:
On 15/06/2017 17:08, JohnD wrote:
See that there's some speculation that we might be heading for the
lowest sea ice extent _maximum_ in the recent record (at least as far as
the first (July) max of the year is concerned - last year the second
(Nov) max was no greater than the first). See eg:

https://sites.google.com/site/arctis...t_byyear_b.png



Is that plot starting to fall away?
Despite Arctic temp anomaly, via GFS , going negative and lack of
storminess.
Has Larsen C broken away at the other end?
Day-of-the-year global sea-ice anomaly deficit metric going strongly
negative.
2 days ago -2.287 x10^6 km^2
yeaterday -2.336


This chart does not show anything unusual happening in the Arctic or Antarctic http://nsidc.org/arcticseaicenews/ch...sea-ice-graph/

but this one does show the Antarctic threatening to flatten out very early in the season https://ads.nipr.ac.jp/vishop/#/extent
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Old June 29th 17, 04:57 PM posted to uk.sci.weather
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Default Global sea ice

On 28/06/2017 21:55, Alastair wrote:
On Wednesday, 28 June 2017 16:58:28 UTC+1, N_Cook wrote:
On 15/06/2017 17:08, JohnD wrote:
See that there's some speculation that we might be heading for the
lowest sea ice extent _maximum_ in the recent record (at least as far as
the first (July) max of the year is concerned - last year the second
(Nov) max was no greater than the first). See eg:

https://sites.google.com/site/arctis...t_byyear_b.png



Is that plot starting to fall away?
Despite Arctic temp anomaly, via GFS , going negative and lack of
storminess.
Has Larsen C broken away at the other end?
Day-of-the-year global sea-ice anomaly deficit metric going strongly
negative.
2 days ago -2.287 x10^6 km^2
yeaterday -2.336


This chart does not show anything unusual happening in the Arctic or Antarctic http://nsidc.org/arcticseaicenews/ch...sea-ice-graph/

but this one does show the Antarctic threatening to flatten out very early in the season https://ads.nipr.ac.jp/vishop/#/extent


The Antarctic sea-ice is falling away predominately
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Old July 1st 17, 02:45 PM posted to uk.sci.weather
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Default Global sea ice

Day-of-the-year global sea-ice anomaly deficit metric
-2.444 million km^2 for 30 June , NSIDC data
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Old July 4th 17, 08:31 AM posted to uk.sci.weather
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Default Global sea ice

On 01/07/2017 15:45, N_Cook wrote:
Day-of-the-year global sea-ice anomaly deficit metric
-2.444 million km^2 for 30 June , NSIDC data


This dies-anno anomaly deficit metric is racing away negative.
-2.648 for 02 July, 100,000 km^2 per day.
I would suggest that like the end of last year, this metric preceeded
the form of that graph at the top of the thread (simple global extent
total sea-ice), showing a recent uptick.ie that global sea-ice has
peaked about 20 June 2016 for a new record NH summer minimum


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Old July 4th 17, 08:49 AM posted to uk.sci.weather
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Default Global sea ice

"N_Cook" wrote in message news
On 01/07/2017 15:45, N_Cook wrote:
....showing a recent uptick.ie that global sea-ice has
peaked about 20 June 2016 for a new record NH summer minimum
======================

I know exactly what you mean, but to be pedantic it looks likely to be a new
record (in the satellite era) low for the NH summer _maximum_ (by about
1Msqkm or about 4% lower than the previous max).

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Old July 4th 17, 02:34 PM posted to uk.sci.weather
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Default Global sea ice

On 04/07/2017 09:49, JohnD wrote:
"N_Cook" wrote in message news
On 01/07/2017 15:45, N_Cook wrote:
....showing a recent uptick.ie that global sea-ice has
peaked about 20 June 2016 for a new record NH summer minimum
======================

I know exactly what you mean, but to be pedantic it looks likely to be a
new record (in the satellite era) low for the NH summer _maximum_ (by
about 1Msqkm or about 4% lower than the previous max).


Made a slip yesterday, - 2.488 for 02 July
and -2.471 for 03 July
so not putatively indicative of a record yet, just less "up-ticky" than
the wipneus plot
I've lost track of where an up to date, daily updated, replacement for
this tracker , is out in wwwland
http://arctic.atmos.uiuc.edu/cryosph....withtrend.jpg

extent or area
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Old July 4th 17, 02:41 PM posted to uk.sci.weather
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Default Global sea ice

On 04/07/2017 15:34, N_Cook wrote:
On 04/07/2017 09:49, JohnD wrote:
"N_Cook" wrote in message news
On 01/07/2017 15:45, N_Cook wrote:
....showing a recent uptick.ie that global sea-ice has
peaked about 20 June 2016 for a new record NH summer minimum
======================

I know exactly what you mean, but to be pedantic it looks likely to be a
new record (in the satellite era) low for the NH summer _maximum_ (by
about 1Msqkm or about 4% lower than the previous max).


Made a slip yesterday, - 2.488 for 02 July
and -2.471 for 03 July
so not putatively indicative of a record yet, just less "up-ticky" than
the wipneus plot
I've lost track of where an up to date, daily updated, replacement for
this tracker , is out in wwwland
http://arctic.atmos.uiuc.edu/cryosph....withtrend.jpg


extent or area


found it again
https://sites.google.com/site/arctis...ormanomaly.png
in terms of SDs instead though, but trend would be the same
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Old July 5th 17, 07:57 AM posted to uk.sci.weather
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Default Global sea ice

Hi all,

Having attended several meetings and discussions with scientists around the globe over the past few months, I have to say that new research indicates that the majority of ice thinning and loss of extent now appears to be as a result of diesel/oil soot particulates settling on the surface of ice and literally warming up in sunlight to melt the ice/snow and form those mysterious puddles across the arctic...thinning ice and causing it to fracture and break up quite readily.

Though mostly over the Arctic and most of the glaciers across the globe, this phenomenon seems now also to be affecting the Antarctic, but to a much to a lesser extent (probably because most Diesel particulates are generated in the Northern hemisphere.

My guess is that the various Antarctic bases using diesel generators and several types of snow moving vehicles cannot be helping...and in my opinion should be withdrawn to protect as much as possible from pollution of all types.

If you look at old (pre 1980s) footage or photographs of the Arctic, you see pure white snow and ice, but footage since then has increasingly shown a grey/black coating, rather like the pattern found on sandy beaches on windy days. This points to airborne deposition. These deposits have found to be oil/diesel particulates,and are not present in older ice layers beneath the surface in anywhere as much as years since the 1980s.

I have to draw the conclusion that diesel particulates are not just bad for human health, but are jeopardising the icy regions of the planet equally as severely.

We need to be ridding global society of diesel vehicles as much as possible,and installing air scrubbers on other equipment to minimise particulate emissions as soon as possible.
Please pass on these findings wherever you can to raise awareness and get as may people on board as you can...we cannot continue to let this happen. When you change your car, please do not go for diesel!

I hope that social media can do something constructive with this and get the world acting as soon as possible ...not just talking.

Please pass it on.

C




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Old July 6th 17, 11:57 AM posted to uk.sci.weather
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Default Global sea ice

On Wednesday, 5 July 2017 08:57:43 UTC+1, Crusader wrote:
Hi all,

Having attended several meetings and discussions with scientists around the globe over the past few months, I have to say that new research indicates that the majority of ice thinning and loss of extent now appears to be as a result of diesel/oil soot particulates settling on the surface of ice and literally warming up in sunlight to melt the ice/snow and form those mysterious puddles across the arctic...thinning ice and causing it to fracture and break up quite readily.

Though mostly over the Arctic and most of the glaciers across the globe, this phenomenon seems now also to be affecting the Antarctic, but to a much to a lesser extent (probably because most Diesel particulates are generated in the Northern hemisphere.

My guess is that the various Antarctic bases using diesel generators and several types of snow moving vehicles cannot be helping...and in my opinion should be withdrawn to protect as much as possible from pollution of all types.

If you look at old (pre 1980s) footage or photographs of the Arctic, you see pure white snow and ice, but footage since then has increasingly shown a grey/black coating, rather like the pattern found on sandy beaches on windy days. This points to airborne deposition. These deposits have found to be oil/diesel particulates,and are not present in older ice layers beneath the surface in anywhere as much as years since the 1980s.

I have to draw the conclusion that diesel particulates are not just bad for human health, but are jeopardising the icy regions of the planet equally as severely.

We need to be ridding global society of diesel vehicles as much as possible,and installing air scrubbers on other equipment to minimise particulate emissions as soon as possible.
Please pass on these findings wherever you can to raise awareness and get as may people on board as you can...we cannot continue to let this happen. When you change your car, please do not go for diesel!

I hope that social media can do something constructive with this and get the world acting as soon as possible ...not just talking.

Please pass it on.

C


Well at least it does not seem to be driving the melt of the Greenland Ice Sheet https://www.nature.com/articles/d41586-017-00870-w


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