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The ash dispersion over Europe during the Eyjafjallajökull eruption e Comparison of CMAQ simulations to remote sensing and air-borne in-situ observations

Matthias, Volker and Aulinger, Armin and Bieser, Johannes and Cuesta, Juan and Geyer, Beate and Langmann, Bärbel and Serikov, Ilya and Mattis, Ina and Minikin, Andreas and Mona, Lucia and Quante, Markus and Schumann, Ulrich and Weinzierl , Bernadett (2012) The ash dispersion over Europe during the Eyjafjallajökull eruption e Comparison of CMAQ simulations to remote sensing and air-borne in-situ observations. Atmospheric Environment, 48, pp. 184-194. DOI: 10.1016/j.atmosenv.2011.06.077.

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Abstract

The dispersion of volcanic ash over Europe after the outbreak of the Eyjafjallajökull on Iceland on 14 April 2010 has been simulated with a conventional three-dimensional Eulerian chemistry transport model system, the Community Multiscale Air Quality (CMAQ) model. Four different emission scenarios representing the lower and upper bounds of the emission height and intensity were considered. The atmospheric ash concentrations turned out to be highly variable in time and space. The model results were compared to three different kinds of observations: Aeronet aerosol optical depth (AOD) measurements, Earlinet aerosol extinction profiles and in-situ observations of the ash concentration by means of optical particle counters aboard the DLR Falcon aircraft. The model was able to reproduce observed AOD values and atmospheric ash concentrations. Best agreement was achieved for lower emission heights and a fraction of 2% transportable ash in the total volcanic emissions. The complex vertical structure of the volcanic ash layers in the free troposphere could not be simulated. Compared to the observations, the model tends to show vertically more extended, homogeneous aerosol layers. This is caused by a poor vertical resolution of the model at higher altitudes and a lack of information about the vertical distribution of the volcanic emissions. Only a combination of quickly available observations of the volcanic ash cloud and atmospheric transport models can give a comprehensive picture of ash concentrations in the atmosphere.

Document Type:Article
Title:The ash dispersion over Europe during the Eyjafjallajökull eruption e Comparison of CMAQ simulations to remote sensing and air-borne in-situ observations
Authors:
AuthorsInstitution or Email of Authors
Matthias, Volker Helmholtz-Zentrum Geesthacht, Geesthacht
Aulinger, Armin Helmholtz-Zentrum Geesthacht, Geesthacht
Bieser, Johannes Helmholtz-Zentrum Geesthacht, Geesthacht
Cuesta, Juan Univ. Paris Est Créteil, Créteil Cedex, F
Geyer, Beate Helmholtz-Zentrum Geesthacht, Geesthacht
Langmann, Bärbel Univ. of Hamburg, Hamburg
Serikov, Ilya Max-Planck-Institut für Meteorologie, Hamburg
Mattis, Ina Leibniz Institute for Tropospheric Research, Leipzig
Minikin, AndreasDLR
Mona, Lucia CNR-IMAA, Potenza, I
Quante, Markus Helmholtz-Zentrum Geesthacht, Geesthacht
Schumann, UlrichDLR
Weinzierl , BernadettDLR
Date:2012
Journal or Publication Title:Atmospheric Environment
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:48
DOI:10.1016/j.atmosenv.2011.06.077
Page Range:pp. 184-194
Status:Published
Keywords:Volcanic eruption, Ash dispersion, Chemistry transport model, Lidar, Sun photometer, Ash concentration
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Jana Freund
Deposited On:16 Jul 2012 13:54
Last Modified:04 Apr 2013 16:38

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