The largest airspace shutdown since WWII: Volcanic ash prediction and its challenges. Eyjafjallajokull eruption, 2010. Helen Dacre 1 , Alan Grant 1 , Natalie Harvey 1 , Helen Webster 2 , Ben Johnson 2 , David Thomson 2 , Franco Marenco 2 1 University of Reading 2 UK Met Office .
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The largest airspace shutdown since WWII: Volcanic ash prediction and its challenges
Eyjafjallajokull eruption, 2010
Helen Dacre1, Alan Grant1, Natalie Harvey1, Helen Webster2, Ben Johnson2, David Thomson2, Franco Marenco21University of Reading 2UK Met Office
14th April – 20th April 2010
Model column Integrated mass
00UTC 16th April
DFAF = 4%
(Dacre et al. 2011, JGR)
Column Integrated Mass Loading
Vertical cross-sectionof ash concentration,
Lidar (black), NAME (grey)
DFAF = 1.2%
(Grant et al. 2012, ACP)
Location of FAAM aircraft profiles
Profile of ash concentration
Measured (black), model (red)
DFAF = 2.6%
(Dacre et al. 2013, ACP)
Q. Can VATD models predict the structure of volcanic ash clouds?
Q. Can VATD models predict the concentration of volcanic ash clouds?
Observed Ash Layer Depth
Location of EARLINET lidars
NAME: narrow/wide emission profile
NAME: varying turbulence scheme
12 UTC 16th April
IASI Volcanic Ash
12:24UTC 16th April
10 UTC 16th April