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Post by markt on May 23, 2011 13:47:00 GMT
For observers in the UK and other parts of western europe, be aware of the potential later this week of 'volcanic sunsets' as a result of the ash clouds from the Gromsvotn volcanic eruption in Iceland drifting to our part of the world.
This is not to say we will definitely see them, but there is certainly the potential for them.
If you do see them please take some pics if possible and post up here!
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Post by Bill W on May 23, 2011 19:00:00 GMT
Eeek,
Things are getting frisky up here!
85.3Km/hr gust on my annemometer!
And it looks like theres a second deep low forming up behind this one.
If i don't get blown away I'll certainly be on the look out.
Saw absolutley nowt last time.
Hold onto your hats!
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Post by markt on May 25, 2011 6:08:01 GMT
Nothing out of the ordinary for me last night (24th)...
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Post by mesospheric on May 27, 2011 6:26:32 GMT
He he. You have to watch the sky - especially that in the late evening around the sun - really carefully. The Met Office, because it didn't match their model's timing, dismissed the latest image, and they think I saw pollen in the air. Not on a southwesterly airflow that's always clear as gin, I didn't! It's odd that the Met Office seem to be so dismissive of observations like this, because their own forecasts contain a disclaimer to the effect that they are 'subject to a level of uncertainty relative to errors in the estimation of eruption strength'. That would appear to provide for quite a degree of uncertainty - and error! I can see the reason for their scepticism, but I've seen three volcanic ash events over the past two years, so here's a selection. You can make up your own mind if it's ash or not, and whether the Met Office ought to take more notice of evidence, rather than models: A day after the latest eruption from Grimsvotn. Not very convincing, but stick with it: static.zooomr.com/images/9946315_f6f0142390_b.jpgVolcanic glass fallout earlier this week: static.zooomr.com/images/9946317_f83533e95f_b.jpgThe 2010 dust (really, it is dust, not cirrus!) static.zooomr.com/images/9946316_02720aa7e6_b.jpgThe following morning, showing crepuscular rays in icelandic dust: static.zooomr.com/images/9946318_0d68136105_b.jpgWaves, probably gravity waves, in a stratospheric dust layer, 2010: static.zooomr.com/images/9946319_88670c97ff_b.jpgAnd finally, a lovely set of gravity waves, again in a stratospheric smoke layer from the Russian fires, 2010 cloudappreciationsociety.org/gallery/index.php?showimage=6938Which are a bit similar to the 2009 Sarychev gravity waves in an exceptionally extensive SO2 layer: static.zooomr.com/images/9946320_13aa54b281_b.jpg |
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Post by markt on May 28, 2011 8:46:41 GMT
Impressive shots! Thanks for posting. I shall indeed look closer the next time things are dusty...
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Post by jamesheath on Jul 25, 2011 15:01:40 GMT
Did anyone see anything similar on Saturday and Sunday (23 and 24 July) evenings? It looked very much like the volcanic dust I've seen before (2010, 2009, 2008), as did the after-sunset effects. Certainly wasn't cirrus; it looked sort of grey-ish brown in places, no halo round the sun. Some gravity-like waves on the Sunday. This was from Lancaster / Cumbria. No photos I'm afraid!
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