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uk.sci.weather (UK Weather) (uk.sci.weather) For the discussion of daily weather events, chiefly affecting the UK and adjacent parts of Europe, both past and predicted. The discussion is open to all, but contributions on a practical scientific level are encouraged. |
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#1
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The sun seemed to set in yellow this afternoon, filtered by thick
cirrostratus, but some time after sunset there was a pink flush across the entire sky, lighting up the underside of the Cs and Ci and revealing extensive fallstreaks and well as some patches below the main sheet .... became quite reddish-purple as the light faded. I can't remember such a contrast between pre-sunset and post-sunset colours before ... not that I spend much time looking. Philip |
#2
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Philip Eden wrote:
The sun seemed to set in yellow this afternoon, filtered by thick cirrostratus, but some time after sunset there was a pink flush across the entire sky, lighting up the underside of the Cs and Ci and revealing extensive fallstreaks and well as some patches below the main sheet .... became quite reddish-purple as the light faded. I can't remember such a contrast between pre-sunset and post-sunset colours before ... not that I spend much time looking. Philip Was the second phase like this (Stogursey): http://www.flickr.com/photos/treetop...os/2221195742/ |
#3
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On 27 Jan, 22:24, Rodney Blackall
wrote: In article , Philip Eden philipATweatherHYPHENukDOTcom wrote: The sun seemed to set in yellow this afternoon, filtered by thick cirrostratus, but some time after sunset there was a pink flush across the entire sky, lighting up the underside of the Cs and Ci and revealing extensive fallstreaks and well as some patches below the main sheet .... became quite reddish-purple as the light faded. I can't remember such a contrast between pre-sunset and post-sunset colours before ... not that I spend much time looking. Philip Saturday Similar here in Buckingham. The contrails above the Cs glowed a deep red for a long time after sunset. Can't remember seeing anything like it in the UK before. It MUST be connected to that pressure jump earlier today! It means we are ALL DOOOOMED! P.S. Sunday It occurred to me that the pressure jump could be a ULF sound wave caused by a sizable extraterrestial body exploding in the stratosphere somewhere West of Ireland. Its dusty debris would give the sunset colour notably absent this evening. There could be a good paper here if someone could draw isochrones of the jump; define an area of origin; search Meteosat images of that area for a significant transient. P.P.S. I don't suppose any computer models would show such a jump caused by a meteorological phenomenon because they specifically filter out such transients. -- Rodney Blackall (retired meteorologist)(BSc, FRMetS, MRI) Buckingham, ENGLAND Using Acorn SA-RPC, OS 4.02 with ANT INS and Pluto 3.03j An interesting idea, Rodney. I too noticed Saturday's late and very red-purple sunset colouration. Fortunately I was watching the sunset and took a series of photographs of Cs and St fra during the 'ordinary' sunset from 1612 to 1631 (sunset was at 1641 here). The colours had reached their peak so I went off to do something else, noticing more than 30 min later to my great surprise that the sky was once again ablaze with a deep red. I took several other photographs between 1706 and 1708 - long after the sunset colours would have faded in a 'normal' sunset - and these confirm the deep ruddy red glow. I thought at the time it strongly resembled the 'volcanic sunsets' of 1985 (after El Chichon) and 1991 (Pinatubo) and I did wonder whether I'd missed news accounts of a big volcanic eruption recently. Perhaps this explains it. I'd be happy to make them available to anyone who wanted to research something along the lines that Rodney suggests - just e-mail me. -- Stephen Burt Stratfield Mortimer, Berkshire |
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