FlyerTalk Forums - View Single Post - Volcanic activity in Iceland delays flights to/from Europe
Old Apr 21, 2010 | 8:43 am
  #469  
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According to

http://news.bbc.co.uk/2/hi/science/nature/8634276.stm

the new "ash standard" considers 2 mg/m3 as acceptable in place of the unrealistic zero previously. Sound a tad high to me. I would have said a figure like 0.1 mg/m3 might have been OK.

Not sure if I would want to send planes into that soup. OTOH, it appears the ash is "good" ash, with a relatively high melting point. And it would also seem (see the DLR test) that actual concentrations at least around Germany (maybe not the UK) are below 0.1 mg/m3.
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