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Satellites Keep Aircraft Away From Volcanic Cloud

Posted by timothy on from the hope-it's-not-opposite-day dept.

coondoggie writes "A range of satellites from a host of different nations are pumping out images and data on the Icelandic volcano currently wreaking havoc on commercial airline traffic and aviation in general. The European Space Agency today noted four major satellites that are monitoring the volcano that erupted this week under Iceland's Eyjafjallajoekull glacier. They include NASA's Aqua and Aura as well as the European Space Agency's Envisat and MetOp spacecraft. Other satellites such as NASA's Terra and NOAA's GOES satellite also provide images." Updated 20100416 01:17 GMT by timothy: Apropos that, 2Y9D57 writes with this "Image of the Icelandic volcano, Eyjafjallajökull, after it began erupting on 15 April. Acquired by the German TerraSAR-X synthetic aperture radar satellite from a height of about 500 kilometers / 300 miles."

19 of 109 comments (clear)

  1. Re:Eya... what? by Anonymous Coward · · Score: 2, Informative

    Ok seriously where does this name come from

    It can be translated to "The Island mountains glacier"

    / AC because I can't be bothered to log in after working long hours due to said volcano :)

  2. Re:Eya... what? by DMUTPeregrine · · Score: 4, Informative

    Eyjafjallajokull: Eyja - Island. Fjalla - Mountain. Jokull - Glaicer. Island-mountain-glaicer. Icelandic is an agglutinative language like German, so words get strung together to make bigger words.

    --
    Not a sentence!
  3. Raw feeds? by Hazee+Daze · · Score: 4, Informative

    So I guess the /. question is can we see their raw feeds?

    NASA Aqua
    NASA Aura
    NASA's Terra
    European Space Agency's Envisat
    European Space Agency's MetOp
    NOAA's GOES: National Oceanic and Atmospheric Administration Geostationary Operational Environmental Satellite
    - http://www.goes.noaa.gov/
    - http://en.wikipedia.org/wiki/NOAA
    - http://en.wikipedia.org/wiki/Geostationary_Operational_Environmental_Satellite

    Space research always pays for itself in the long term. The acronyms in the NOAA GOES got me interested.

    1. Re:Raw feeds? by ctilmes · · Score: 2, Informative

      http://lance.nasa.gov/
      http://rapidfire.sci.gsfc.nasa.gov/
      http://satepsanone.nesdis.noaa.gov/pub/OMI/OMISO2/index.html

  4. Re:Pro editing by celibate+for+life · · Score: 2, Informative

    Icelandic is such a beautiful language, and so conservative too. It's so close to Old Norse it's fascinating.

  5. Re:The sky over Germany looked clear today by Anssi55 · · Score: 5, Informative

    Not directly answering your question, but:
    PICTURES: Finnish F-18 engine check reveals effects of volcanic dust
    Finnish fighter jets damaged by volcanic cloud
    Original article of Finnish Air Force (in Finnish)

  6. If this is Iceland, the pic is scary. by Hazee+Daze · · Score: 3, Informative

    http://rapidfire.sci.gsfc.nasa.gov/realtime/single.php?T101061035

    1. Re:If this is Iceland, the pic is scary. by Anonymous Coward · · Score: 2, Informative

      Good news, everyone! It's not Iceland. It shows Svalbard (left) and Scandinavia (right). Look at the keymap (the globe icon on the left side). Actually, I'm not sure what your concern is. It's just a storm system. They're all over the place.

      This image shows Iceland (in the upper left corner). Another way to look at the Terra/MODIS images is via the daily Arctic mosaic. Iceland is the the bottom of the mosaic, and then you can click on it and get a more detailed view, where the ash plume is visible as an eastward-directed brownish-grey plume of cloud near the southern coast of the island, partially hidden beneath the white, normal clouds. They also have a cropped-down view of Iceland. The 250m view is detailed enough to see the plume easily.

    2. Re:If this is Iceland, the pic is scary. by symbolset · · Score: 5, Informative

      When this volcano blows a major Katla eruption follows soon after. Katla is about 10 miles East.

      This one shuts down half the air travel in western Europe for a few days. Katla shuts down summer. The farmers are not worried about this volcano:

      "I am not afraid of this eruption but I fear Katla. It might not happen immediately but it will happen. Then we will be talking about much more power," Agnarsson said.

      It has to do with the type of plate tectonics here. The plates are pulling apart, yielding a very deep rift that releases very hot magma from very far down in the mantle, which is saturated with CO2 and when released goes very high, far, thick and long. Naturally this will melt a great deal of Iceland glacier very quickly, impacting the currents in the Atlantic.

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      Help stamp out iliturcy.
    3. Re:If this is Iceland, the pic is scary. by Anonymous Coward · · Score: 4, Informative

      "It has to do with the type of plate tectonics here. The plates are pulling apart, yielding a very deep rift that releases very hot magma from very far down in the mantle, which is saturated with CO2 and when released goes very high, far, thick and long. Naturally this will melt a great deal of Iceland glacier very quickly, impacting the currents in the Atlantic."

      This is true for all of the volcanoes in Iceland. They are related to the rifting that occurs along the mid-Atlantic Ridge, where the North American plate is stretching away from the Eurasian Plate. The magma comes up the cracks and eventually erupts onto the surface. CO2 has little or nothing to do with melting the glaciers. The heat of the lava at the vent does, and the contact with the water produces much of the explosiveness that eventually produces ash and lofts it into the atmosphere. The climatic effects are mainly from a combination of the ash particles and aerosols such as sulphur dioxide, and they are mostly cooling effects due to obscuring the Sun, however, Eyjafjallajokull is not a big enough eruption -- so far -- to have a significant climatic effect. Katla, by contrast, is a much larger volcanic center and has historically had much bigger eruptions, hence the worry if that one blows too. The effect on Atlantic ocean water is negligible except around Iceland itself.

      There are plenty of the more technical details at the Nordic Volcanological Center site, including a link to this paper [PDF] that has ample detail about these two volcanoes and their historical and more modern behaviour. It isn't cause for optimism. The key phrase from the introduction is that eruptions at Katla have been up to 2km3 in volume, whereas those at Eyjafjallajokull "have been negligible in historic times and range in the 0.1km3 scale. This is a "small" eruption. Really. Even with that "negligible" volume, the most recent eruption lasted from 1821 to 1823, and was with Katla erupting simultaneously. These eruptions have sometimes A) lasted for many months or years, and B) been much, much larger if Katla erupts too. Not to mention the local effects such as even bigger jokulhlaups than have been triggered so far, and for some eruptions (e.g., Laki in the 1700s), release of toxic gasses such as HF too. Sometimes the eruptions are no big deal, and they wane and stop over a few weeks. Sometimes they are nasty and prolonged. It isn't clear what this one will do, but if there are signs that Katla is going to join in ... be prepared for something much more awful.

  7. Re:The sky over Germany looked clear today by Ogi_UnixNut · · Score: 5, Informative

    It's dangerous in three main ways to an aircraft:

    Least dangerous (relatively) is the st.elmos fire produced by static buildup (you are flying through a good static generator at high speed).

    Next is the fact that you are flying through ash, which is a bit like sandpaper. The result is your turbines get sand blasted, ruining them in many ways. This is not an instant failure, most aircraft will just continue and get the engines repaired/replaced at next stop.

    Most dangerous is the third. The glass, silica and other parts thrown into the air will melt in the high temperature of the turbine combustion chamber. This will then tend to fuse and block further combustion, resulting in the engine shutting down mid-air. Bad situation to be in, made worse by the fact there is no guarantee you can start it up again (normally after a few mins the gunk will solidify and break off, allowing you to restart the engine, but this isn't guaranteed (and this is assuming it breaks off before you impact the ground)

  8. Re:The sky over Germany looked clear today by riverat1 · · Score: 5, Informative

    Also the abrasive effect of the ash can scratch the windows, particularly the forward facing ones the pilots look out of and it can abrade the aluminum skin, particularly the leading edges of the wings. Neither will bring the plane down but they can necessitate expensive repairs and if the windows become opaque enough it can make landing difficult.

  9. Surely you mean "Arpapos" editing... by Anonymous Coward · · Score: 1, Informative

    apropos [ap-ruh-poh]
    –adverb
    1. fitting; at the right time; to the purpose; opportunely.

  10. Re:Space program by sznupi · · Score: 3, Informative

    ESA / Arianespace did not develop manned spaceflight capability; and yet they have very large chunk of satellite launching business (with 50+% of geostationary ones). Even when their manned spacecraft will show up, it will be probably a modification of unmanned ATV.

    (note: I'm pro manned spaceflight, if done well; just sayin'...)

    --
    One that hath name thou can not otter
  11. Re:Pro editing by h4rr4r · · Score: 2, Informative

    Replacing an umlaut with vowel + e is the normal way to do it when printing for a language that lacks umlauts. I have to do this if I use my mother's maiden name for any services.

  12. Re:Space program by gyrogeerloose · · Score: 2, Informative

    Uhhh. How do you think we first explored space? We sent probes (aka satellites) up there (Sputnik ring any bells?).

    Did the original Sputnik actually probe anything? I thought it just was just a way for the USSR to demonstrate to the USA that it was capable of putting something into orbit and, by inference, put an ICBM on Eisenhower's front porch if it wanted to.

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    This ain't rocket surgery.
  13. Volcano research by AlpineR · · Score: 2, Informative

    I also remember some Congress person complaining about the government paying for volcano research. I think they were from Louisiana or Mississippi and they laughed at what a waste of money it is for their citizens to pay to study volcanoes. Don't we already know everything about them anyway?

    Well, sir, this is why. If a volcano blows, it affects more than its immediate neighbors.

  14. Re:The sky over Germany looked clear today by MrNemesis · · Score: 2, Informative

    Ladies and gentlemen, this is your captain speaking. We have a small problem. All four engines have stopped. We are doing our damnedest to get them under control. I trust you are not in too much distress.

    http://en.wikipedia.org/wiki/British_Airways_Flight_9

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    Moderation Total: -1 Troll, +3 Goat
  15. Re:Space program by khallow · · Score: 3, Informative

    Grandparent is correct. These satellites do not use technology developed from anyone's manned space program. Instead, they use technology that comes from various countries' reconnaissance satellites which are unmanned (sure, manned versions were planned at one time, but they never really contributed). The only other overlap is the launch vehicles which would have been developed anyway.