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This is so exciting. The last time there was a major volcanic eruption in Europe, it shut down air travel for ages over there. Plus there was a cool and totally improbable scene in Walter Mitty about it.
For ages = for one week in the Central Europe. I had a trip booked for roughly exactly the duration of the eruption back then.
It was shut down entirely for a week initially, and then would be shut down again periodically as the ash/debris cloud floated along through air lanes.
That Walter Mitty scene made me laugh. It was filmed in Seyðisfjörður, which is around 700 km away from Eyjafjallajökull. They had even changed the map shown in the movie, so it was unrecognizable for an Icelander! 😂
That Walter Mitty scene made me laugh. It was filmed in Seyðisfjörður, which is around 700 km away from Eyjafjallajökull. They had even changed the map shown in the movie, so it was unrecognizable for an Icelander! 😂
Þórdís [reporter] says people are flocking and letting the warning words of the Civil Defence fall on deaf ears. The police are also working hard to remove cars that are inside the closure area.
Þórdís and Bragi [photographer] are watching the eruption up close. However, they cannot stay there for long because the lava is expected to soon flow over the roads they used to get there.
Typically, volcanic eruptions have a cooling effect. One of the principle emissions is sulfur dioxide which reflects high frequency solar energy (green house gases absorb and convert that same radiation into longer wave energy which excites atmospheric gases).
Volcanoes typically erupt with a lot of ash which blocks the sun and cools the planet. Get a big enough volcano and the earth stays cooler for years, disrupting crops and creating a potential famine.
Lava eruptions like this tend to be less dangerous than ash eruptions, which can mess up air traffic and the ashfall is bad for the lungs and crops. So I don’t think there’s much cause for concern.
TIL volcanoes even have two different eruptions. I just always imagined they came with ash as a given. That makes me feel a bit better about this, though I still echo their hope for as little damage as possible.
I think it depends on the particular volcanoes. The volcanoes in Iceland and Hawaii, IIRC, have thinner and less gassy magma, so there’s not as much gas buildup, and the eruptions tend to have more liquid lava. Elsewhere, say Mt. St. Helens, the eruptions tend to have thick lava, with lots of trapped gas inside, that tend to cause giant explosions, pyroclastic flows & big ash clouds.
I would hazard a guess that it's dependent on even more than region. Wasn't it an Icelandic volcano that shut down air travel because of ash a few years back?
When it erupts underneath a glacier, it causes huge clouds of ash to form. The volcano you’re talking about (Eyjafjallajökull) is a glacier volcano in the highlands whereas this one is on the Reykjanes peninsula on the west side.
I’m by no means an expert but in Iceland,
eruption under a glacier = ash eruption
eruption not under a glacier = lava flow.
I’m sure it’s more nuanced than that but it seems to be the rule of thumb over here.
I live about 30 minutes away. We’ve had a lot of earthquakes the past few days. This should shut them up :) Some scientists say we’ve entered a period of very frequent volcanic activity for the next 100 years or so in this area.
Maybe, maybe not. Fire triangle is heat, fuel, oxygen.
We can assume safely fuel and heat, oxygen is tricky though.
Explosions and ignitions only happen in a happy zone.
Too much or too little oxygen disables everything.
We also have to calculate what mix of hydrocarbons we are dealing with, how hot the ignition points are and the pressure exerted by gravity and the atmosphere.
I don't think there is enough oxygen.
Even under ideal circumstances and distribution, there is still only 21% oxygen in the air.
Propane needs 8x the amount of oxygen for a complete burn as acetylene does and acetylene in open air just produces thick greasy black strings in the air.
Idk the exact mix but I know you can barely hear acetylene coming out of a torch, but the oxygen side is loud as fuck.
Given a reasonable variance for imprecision, I feel the variance in sound levels is proportional to gas flow.
However depending on the pressure, you could need even more.
Diesel fuel is damn near impossible to light on fire at SPT, but put it under compression and it will self ignite.
We use turbos, basically little air compressors, to force as much regular air as possible into an engine, because it uses so much oxygen.
It mimics/is the inspiration for the geoengineering idea (highly impractical at the scale required) of high altitude aerosols injection to slow global warming.
Good article, and pretty interesting stuff. That said, I can’t imagine this being a “defense mechanism” for increased temperatures, as during the Cretaceous period there wasn’t any increase in seismic activity that we are currently aware of.
These ones cool stuff in the short term (and cause acid rain, ozone depletion, famines and long term warming; and there’ll probably be a new thing this time around where some countries have reduced solar output).
They also ground planes and cancel road trips.
This volcano might even save us from a blue arctic event for a few extra years, so it could be a wash in terms of climate (although definitely not for europe’s ability to feed itself)
I don’t mean to steal attention away from Iceland and hope you are all safe, but it’s a similar thing in Japan. We’re due for a megathrust earthquake that could be way way worse than Fukushima.