I'm no meteorologist, but am interested in weather - particularly extremes. I have just read the link below, but have no idea of the article's validity, so I'd like any thoughts.

With all the talk of 'unprecedented polar conditions' leading to this begs the question: is this how other extreme winters were caused, e.g. 1947, 1963 which were presumably much worse than winter 2018 is ever going to be!

Thanks.

Jan


https://robertscribbler.com/2018/02/...e-in-february/

On Monday, 26 February 2018 10:12:11 UTC, Janet Winslow wrote:
I'm no meteorologist, but am interested in weather - particularly extremes. I have just read the link below, but have no idea of the article's validity, so I'd like any thoughts.

With all the talk of 'unprecedented polar conditions' leading to this begs the question: is this how other extreme winters were caused, e.g. 1947, 1963 which were presumably much worse than winter 2018 is ever going to be!

Thanks.

Jan


https://robertscribbler.com/2018/02/...e-in-february/

Hi Jan

Yes, it's certainly true that air temperatures yesterday at Cape Morris Jesup rose to +4.7°C at 09 UTC. That weather station is only 442 miles from the pole. There is no closer SYNOP stations to the pole, although there are probably a number of 'floating' AWS scatter across the frozen Arctic Ocean.

It's quite bizarre that for a while yesterday it might have been colder down here in Devon just for a few hours, than it is was in the high Arctic. It's probably another symptom of the recent SSW event in the high atmosphere, and of course the underlying warming that's been going on in recent years.

You can find a bit more detail about it he-

https://wp.me/p7wiux-335

Bruce.

On Monday, 26 February 2018 10:12:11 UTC, Janet Winslow wrote:
I'm no meteorologist, but am interested in weather - particularly extremes. I have just read the link below, but have no idea of the article's validity, so I'd like any thoughts.

With all the talk of 'unprecedented polar conditions' leading to this begs the question: is this how other extreme winters were caused, e.g. 1947, 1963 which were presumably much worse than winter 2018 is ever going to be!

Thanks.

Jan


https://robertscribbler.com/2018/02/...e-in-february/

There is a chart here of the temperature north of 80 N: http://ocean.dmi.dk/arctic/plots/mea...meanT_2018.png You can compare it with last year he http://ocean.dmi.dk/arctic/plots/mea...meanT_2017.png and see that the current rise is exceptional.

There is a chart here of the temperature in the stratosphere also showing an unusal rise called a SSW (sudden strayospheric warming). http://ds.data.jma.go.jp/tcc/tcc/products/clisys/STRAT/

I have been told here that SSWs produce Scandi Highs, anticyclones centred on Scabdanavia. These high pressure phenomena tend to be longlsting and block the flow of low pressure cyclones acrooss the North Atlantic to the UK, and are also called blocking highs.

Scandi highs produce clockwise winds bringing winds from Siberia to the UK and winds from the North Atlantic to the Arctic Ocean. Continental surfaces become much colder than ocean surfaces in winter, so the north-east winds coming to the UK are much colder than the south west winds travelling to the Arctic.

The 1962 cold weather seems to have coincided with the Russians testing a hydrogen bomb in the Arctic. Could this have also produced a Scandi High?

In message ,
Alastair writes
The 1962 cold weather seems to have coincided with the Russians testing
a hydrogen bomb in the Arctic. Could this have also produced a Scandi
High?

I believe there were stories around in the 1950s and early 1960sthat
atomic and subsequently hydrogen bomb tests might be affecting the
weather, but I'm not aware of any convincing evidence being produced.
--
John Hall
"Hegel was right when he said that we learn from history
that man can never learn anything from history."
George Bernard Shaw (1856-1950)

On 27/02/18 10:22, John Hall wrote:
In message ,
Alastair writes
The 1962 cold weather seems to have coincided with the Russians
testing a hydrogen bomb in the Arctic. Could this have also produced a
Scandi High?

I believe there were stories around in the 1950s and early 1960sthat
atomic and subsequently hydrogen bomb tests might be affecting the
weather, but I'm not aware of any convincing evidence being produced.

Yes, I remember my father mentioning that in the early 50s. He'd say how
the summers would be cold and wet for a while because of the bombing and
breakup of the ice but then they'd turn warmer and drier. I guess he got
it from the Daily Mirror.

It's obviously total ******** but I wonder if it originated from mangled
versions of the ideas that the US military scientists were looking into
regarding clearing the Arctic of ice in order to allow their ships to
get closer to northern USSR.

--
Graham P Davis, Bracknell, Berks. Web-site: http://www.scarlet-jade.com/
"There is nothing more frustrating than playing hide and seek with a
deaf wolf." [Benton Fraser]
OS: Linux [openSUSE Tumbleweed]

On 27/02/2018 11:36, Graham P Davis wrote:
On 27/02/18 10:22, John Hall wrote:
In message ,
Alastair writes
The 1962 cold weather seems to have coincided with the Russians
testing a hydrogen bomb in the Arctic. Could this have also produced
a Scandi High?

I believe there were stories around in the 1950s and early 1960sthat
atomic and subsequently hydrogen bomb tests might be affecting the
weather, but I'm not aware of any convincing evidence being produced.

Yes, I remember my father mentioning that in the early 50s. He'd say how
the summers would be cold and wet for a while because of the bombing and
breakup of the ice but then they'd turn warmer and drier. I guess he got
it from the Daily Mirror.

It's obviously total ******** but I wonder if it originated from mangled
versions of the ideas that the US military scientists were looking into
regarding clearing the Arctic of ice in order to allow their ships to
get closer to northern USSR.


And the Lynton and Lynmouth flash flood disaster 1952 was caused by UK
military experiments cloud-seeding with silver iodide (to direct
incapacitating heavy rain on the enemy) - well its a good story.