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Ols500

Siberian High

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Hi could someone help me understand how a high pressure in eastern Russia can bring cold air all the way to the UK?

 

Thanks, Ollie.

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All depends where it sits, if it sits just right, the nice cold easterly will set in, then all you want is a nice low pressures system to undercut, bingo

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4 hours ago, Ols500 said:

Hi could someone help me understand how a high pressure in eastern Russia can bring cold air all the way to the UK?

 

Thanks, Ollie.

 Hi Ollie. There's a lot of talk on here about Siberian high pressure & whilst it is important as it builds up intense cold over that area, but the most important thing is a Scandinavian high pressure to funnel that Russian cold west to the UK. In the Northern hemisphere winds move around a high pressure system in a clockwise direction. So this means when a high pressure system is parked over Scandinavia we in the UK get easterly winds & that very cold air from Eastern Europe & Russia gets shunted to our shores.

January 1987 is probably the most infamous example.

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More recent examples include late February 2018

archives-2018-2-28-12-0.thumb.png.4fb3cc399ddaa8552adbfb6a3a881618.pngarchives-2018-2-28-12-1.thumb.png.51913fa96e77e2a7b157832c4d61f438.png

And mid March 2018

archives-2018-3-18-0-0.thumb.png.ef503f3b36fbcb57d521fce055bd2179.pngarchives-2018-3-18-0-1.thumb.png.911de2ddfded9574eef6c88c324f03d9.png

 

Edited by Frost HoIIow

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Some articles on Siberian High

http://glossary.ametsoc.org/wiki/Siberian_high

https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.3517

https://www.researchgate.net/publication/226881857_The_Siberia_High_and_climate_change_over_middle_to_high_latitude_Asia

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0158122

https://www.clim-past.net/15/781/2019/

https://www.tandfonline.com/doi/pdf/10.3878/AOSL20150022

https://meetingorganizer.copernicus.org/EGU2016/EGU2016-1601-3.pdf

https://en.wikipedia.org/wiki/Siberian_High

"High pressure (or anticyclone)

In an anticyclone (also referred to as a 'high') the winds tend to be light and blow in a clockwise direction. Also the air is descending, which stops the formation of clouds. The light winds and clear skies can lead to overnight fog or frost. If an anticyclone persists over northern Europe in winter, then much of the British Isles can be affected by very cold east winds from Siberia. However, in summer an anticyclone in the vicinity of the British Isles often brings fine, warm weather." https://www.metoffice.gov.uk/weather/learn-about/met-office-for-schools/other-content/other-resources/understanding-weather 

 

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