Bardarbunga eruption ended

At noon on February 28, the Scientific Advisory Board for Iceland´s recent volcanic activity officially declared that the eruption at Holuhraun had come to an end. 

One day earlier, a helicopter surveillance flight showed no more glow at the eruptive site, suggesting that the magma flow was over, says volcanodiscovery.com. Volcanic gas was, however, still being released from both the eruptive site and the lava field.

Beginning on 31 August 2014, this 6-month-long eruption became one of the very rare prolonged fissure eruptions in Iceland in the past 1,000 years, and was the largest Icelandic eruption since the Laki eruption in 1783-1785.

In the aftermath of the Laki eruption, temperatures plunged globally due to the large amounts of sulphur dioxide injected in the northern hemisphere. The ensuing cold-related famine is estimated to have killed about 6 million people worldwide, making it one of the most deadly volcanic eruptions of all times.

Luckily, the recent eruption was not as poisonous, although it did emit huge amounts of sulphur dioxide into the atmosphere.

At one time, some 40,000 to 60,000 tons of sulphur dioxide were spewing out of Bárðarbunga every single day, according to the Icelandic National Broadcasting Service, RUV.

Every single day!

That’s more than twice the amount of sulphur dioxide spewed from all of Europe’s smokestacks.

Icelandic Met Office – http://en.vedur.is/earthquakes-and-volcanism/articles/nr/2947

Wikipedia- http://en.wikipedia.org/wiki/Laki

http://www.volcanodiscovery.com/bardarbunga/updates/end-holuhraun-eruption.html

Thanks to H.B. Schmidt for these links


4 thoughts on “Bardarbunga eruption ended

  1. “In the aftermath of the Laki eruption, temperatures plunged globally due to the large amounts of sulphur dioxide injected in the northern hemisphere”

    Surely aerosols were not the ONLY factor in this !!

    A simple calculation shows that the additional W/sqm emitted by hot lava is significant even on global scales.

    The lava would heat the air locally to much higher levels than usual – it would rise at a higher than usual temperature and radiate more powerfully to space.

    This must serve to remove significantly more energy from the local atmosphere than if the hot lava were not present and hence ultimately cause cooling once the influx of hot lava ceases.

    We know that hot objects cool faster than cold ones – both by conduction/convection (Newton’s laws) and by radiation (Stefan-Boltzmann law).

  2. The amount of S02 would be approximately 7,280,000 tonnes into the atmosphere. That must have some effect?

    • All we will hear this year is El Niño-this, El Niño-that – and how 2015 will be even hotter globally than 2014. It’s already begun in press releases from NASA.

    • The SO2 that Laki put into the atmosphere was estimated at 120 million tons plus 8 million tons of fluoride.
      That produced a lot of acid vapor.

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