Scientists have found to be justified closure of air traffic in 2010 due to the eruption of the Icelandic volcano Eyjafjallajökull. Research article appeared in the journal Proceedings of the National Academy of Sciences, and its summary results ScienceNOW.
According to modern views, volcanic ash in the air is dangerous for several reasons, chief among them — reducing visibility and getting into the turbine aircraft. The latter, in particular, leads to the fact that the particles of the melt from the high temperatures inside the engine, naleplyayutsya on turbine blades, which can cause the motor to stop in the air.
In the new work, scientists analyzed samples of ash that were ejected during the eruption of a volcano. Usually, the mass of particles with linear dimensions not exceeding 10 micrometers (these particles are best melt in turbines) is about 2 percent of the total emissions of the volcano. In the case of Eyjafjallajokull, however, the rate in the first months of the eruption was about 20 percent.
In addition, scientists have found that due to the nature of the eruption, most of the particles had an irregular shape with a lot of sharp edges. Because of similar geometry surface area of a typical particle was higher by an order. According to the researchers, these fragments could pose a serious threat to human health, because they can damage the lungs, as well as carry on their surface pollutants.
The eruption of the Eyjafjallajokull volcano began on 21 March 2010. This has caused massive flight cancellations across Europe, in particular, over the UK and Denmark, the flights were fully suspended. Overall losses from the closure of the airport is 1.5-2.5 billion, affecting more than 10 million passengers.