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Post by byz on Aug 20, 2010 7:04:48 GMT
This made me laugh ;D At the top of the page hraun.vedur.is/ja/Katla2009/gosplott.htmlit says in bold letters: "Katla is NOT erupting and there are NO indications that Katla is about to erupt. Information on this page is for the Eyjafjallajökull eruption." It shows that even though Icelanders have an outward persona of being relaxed about volcanic activity on Iceland, this betrays some real nervous feelings below the surface (not that I'd be any better if I lived next to that monster volcano).
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Post by oldconfuseddude on Aug 21, 2010 4:10:38 GMT
en.wikipedia.org/wiki/KatlaKatla has erupted 16 times since 930 AD, the last in 1918. I know of no widespread climate catastrophes that have occurred because of any of these eruptions. So why should we expect one now? Old and Confused as usual
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Post by byz on Aug 21, 2010 8:05:30 GMT
en.wikipedia.org/wiki/KatlaKatla has erupted 16 times since 930 AD, the last in 1918. I know of no widespread climate catastrophes that have occurred because of any of these eruptions. So why should we expect one now? Old and Confused as usual It will be in the UK, Northern France and Scandinavia which are usually downwind of Iceland, also Icelandic volcanoes tend to produce a lot of sulphur and fluorine. Fluorine is very nasty when airborne as it lands on grass and plants and kills livestock, also fluorine poisoning is really, really nasty Summer mortality in the UK for outdoor workers doubles, when a really big volcano goes off in Iceland.
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Post by nautonnier on Aug 21, 2010 11:50:04 GMT
en.wikipedia.org/wiki/KatlaKatla has erupted 16 times since 930 AD, the last in 1918. I know of no widespread climate catastrophes that have occurred because of any of these eruptions. So why should we expect one now? Old and Confused as usual It will be in the UK, Northern France and Scandinavia which are usually downwind of Iceland, also Icelandic volcanoes tend to produce a lot of sulphur and fluorine. Fluorine is very nasty when airborne as it lands on grass and plants and kills livestock, also fluorine poisoning is really, really nasty Summer mortality in the UK for outdoor workers doubles, when a really big volcano goes off in Iceland. A lot depends on the polar vortex and the jetstream. The reason that there were problems with Eyjafjallajökull was that the jetstream Rossby wave again was relatively stable and weather systems were (it was claimed) taking the ash cloud south over UK. Normally even the Shetlands and Norway would escape much effect. Its a measure of how much equatorward movement there has been in the weather systems. It is that which appears to be driving the climate at the moment.
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Post by byz on Aug 21, 2010 12:37:25 GMT
Generally in the UK our weather comes from the Atlantic so SW or NW winds. As cyclones come towards us from the US we tend to get some part of the cyclones passing over Iceland. The UK is very close to Iceland (only Greenland is closer) and the UK is closer to Iceland than most of Europe. When we get a blocking High pressure then our weather tend to come from Europe, but it is not that common unfortunately
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Post by throttleup on Aug 21, 2010 13:01:56 GMT
en.wikipedia.org/wiki/KatlaKatla has erupted 16 times since 930 AD, the last in 1918. I know of no widespread climate catastrophes that have occurred because of any of these eruptions. So why should we expect one now? Old and Confused as usual I imagine one major difference these days is the wide impact on air travel and its resulting economic impact, which wouldn't have been in issue in 1918 and previous years. Of course, the world will survive a Katla eruption. But I'm sure many Europeans have some well-founded concerns as to its effect on their daily lives.
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Post by byz on Aug 21, 2010 16:16:58 GMT
The big difference for the UK would be that these days most of our food is flown in from around the world for freshness. Prior to 1970's the British merchant navy brought in all of our food, at one point around 1900 half the ships on the seas were British So in the past a large volcanic eruption made very little difference, however if European airspace got shutdown for six months it would have a huge global economic effect. Third world counties would not be able to sell their produce and even China would be affected.
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Post by thingychambers69 on Aug 22, 2010 11:30:21 GMT
en.wikipedia.org/wiki/KatlaKatla has erupted 16 times since 930 AD, the last in 1918. I know of no widespread climate catastrophes that have occurred because of any of these eruptions. So why should we expect one now? Old and Confused as usual I think the worry is if it coincides with the negative PDO, though I dont know of any catastrophes either
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Post by icefisher on Aug 22, 2010 20:50:15 GMT
en.wikipedia.org/wiki/KatlaKatla has erupted 16 times since 930 AD, the last in 1918. I know of no widespread climate catastrophes that have occurred because of any of these eruptions. So why should we expect one now? Old and Confused as usual I think the worry is if it coincides with the negative PDO, though I dont know of any catastrophes either One might ask if its connected to the PDO. Perhaps a cooling atmosphere works like squeezing a pimple. But sea level could drop a foot in Iceland and we would be the last to know, have it go up a centimeter and its a headline.
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Post by byz on Aug 24, 2010 10:40:45 GMT
Heightened activity in and around Katla in the last 24 hours also the quakes are bigger
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Post by byz on Aug 26, 2010 20:12:14 GMT
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gus
New Member
Posts: 4
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Post by gus on Aug 26, 2010 21:30:19 GMT
I've read that it is thought to be the natural decay of radioactive elements inside the Earth that keeps the planet hot enough for volcanic action. www.tulane.edu/~sanelson/eens211/earths_interior.htm Here is new proof that increased solar activity slows the decay rate and that the decay rate is higher with a quiet sun like at the current solar minimum. www.sciencedaily.com/releases/2010/08/100825093253.htmThe increased decay rate due to the current solar minimum should result in more heat created inside the Earth that could result in higher volcanic action and so increased risk for Katla to go BOOM!!!
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Post by sigurdur on Aug 26, 2010 22:04:15 GMT
MMMM....interesting. Maybe this affects plant growth as well?
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Post by byz on Oct 5, 2010 18:12:41 GMT
A sudden upsurge of earthquakes in Katla's caldera
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Post by hunterson on Oct 5, 2010 20:50:37 GMT
I've read that it is thought to be the natural decay of radioactive elements inside the Earth that keeps the planet hot enough for volcanic action. www.tulane.edu/~sanelson/eens211/earths_interior.htm Here is new proof that increased solar activity slows the decay rate and that the decay rate is higher with a quiet sun like at the current solar minimum. www.sciencedaily.com/releases/2010/08/100825093253.htmThe increased decay rate due to the current solar minimum should result in more heat created inside the Earth that could result in higher volcanic action and so increased risk for Katla to go BOOM!!! Actually that was not proven, and in fact has been dis-proven. We do not need a variable rate of atomic decay to fuel the Earth's tectonics.
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