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

Matthias, V., Aulinger, A., Bieser, J., Cuesta, J., Geyer, B., Langmann, B., et al. (2012). The ash dispersion over Europe during the Eyjafjallajökull eruption - Comparison of CMAQ simulations to remote sensing and air-borne in-situ observations. Atmospheric Environment, 48, 184-194. doi:10.1016/j.atmosenv.2011.06.077.

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Matthias, V., Autor
Aulinger, A., Autor
Bieser, J., Autor
Cuesta, J., Autor
Geyer, B., Autor
Langmann, Baerbel1, Autor           
Serikov, Ilya2, Autor           
Mattis, I., Autor
Minikin, A., Autor
Mona, L., Autor
Quante, M., Autor
Schumann, U., Autor
Weinzierl, B., Autor
Affiliations:
1A 2 - Climate Processes and Feedbacks, Research Area A: Climate Dynamics and Variability, The CliSAP Cluster of Excellence, External Organizations, Bundesstraße 53, 20146 Hamburg, DE, ou_1863497              
2Observations and Process Studies, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913575              

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 Zusammenfassung: 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. © 2011 Elsevier Ltd.

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Sprache(n): eng - English
 Datum: 20112012
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
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 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.atmosenv.2011.06.077
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Titel: Atmospheric Environment
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Oxford [England] : Pergamon
Seiten: - Band / Heft: 48 Artikelnummer: - Start- / Endseite: 184 - 194 Identifikator: ISSN: 1352-2310
CoNE: https://pure.mpg.de/cone/journals/resource/958480288336