Characterization of volcanic ash from the 2011 Grímsvötn eruption by means of single-particle analysis

This work focuses on transport and properties of ash from the Icelandic volcano Grímsvötn that erupted in spring 2011. Atmospheric transport of volcanic ash from the eruption was simulated using the Danish Emergency Response Model of the Atmosphere (DERMA). The arrivals of volcanic particles were de...

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Bibliographic Details
Published in:Atmospheric environment (1994) 2013-11, Vol.79, p.411-420
Main Authors: Lieke, K.I., Kristensen, T.B., Korsholm, U.S., Sørensen, J.H., Kandler, K., Weinbruch, S., Ceburnis, D., Ovadnevaite, J., O'Dowd, C.D., Bilde, M.
Format: Article
Language:English
Subjects:
DERMA
Earth, ocean, space
Exact sciences and technology
External geophysics
FIB/SEM
Grímsvötn
HR-ToF AMS
Marine
Meteorology
Particles
Particles and aerosols
Volcanic ash
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Summary:This work focuses on transport and properties of ash from the Icelandic volcano Grímsvötn that erupted in spring 2011. Atmospheric transport of volcanic ash from the eruption was simulated using the Danish Emergency Response Model of the Atmosphere (DERMA). The arrivals of volcanic particles were detected on-line at Mace Head at the West coast of Ireland during volcanic plume advection identified by high resolution time of flight aerosol mass spectrometry (HR-ToF AMS). Based on DERMA information aerosol particles were collected in Copenhagen, Denmark, before predicted arrival of the ash plume and during a period where ash was present in the air. Analysis of the meteorological conditions shows that the particles collected before arrival of the volcanic ash may serve as a good reference sample allowing identification of significant changes in ambient aerosol properties during the volcanic ash event over Copenhagen. Using single particle analysis in scanning electron microscopy (SEM), data on structure, chemical composition, size and morphology of individual volcanic ash particles from the Grímsvötn eruption after atmospheric transport to Scandinavia are provided. Particles were sliced with Focused Ion Beam (FIB). Element mappings from cross-sections through collected volcanic ash particles reveal inhomogeneous distributions of the elements K, Mg, Fe and Ti. •Atmospheric transport of volcanic ash from the eruption was simulated using DERMA.•The presence of ash particles over Copenhagen was proven by SEM/EDX.•FIB/SEM showed the irregular distribution of Mg, Fe and Ti in the particle volume.•We found Ti detectable in amounts in all volcanic ash particles of this eruption.
ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2013.06.044