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| Titel |
CARIBIC aircraft measurements of Eyjafjallajökull volcanic clouds in April/May 2010 |
| VerfasserIn |
A. Rauthe-Schöch, A. Weigelt, M. Hermann, B. G. Martinsson, A. K. Baker, K.-P. Heue, C. A. M. Brenninkmeijer, A. Zahn, D. Scharffe, S. Eckhardt, A. Stohl, P. F. J. Velthoven |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 2 ; Nr. 12, no. 2 (2012-01-19), S.879-902 |
| Datensatznummer |
250010537
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| Publikation (Nr.) |
 copernicus.org/acp-12-879-2012.pdf |
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| Zusammenfassung |
| The Civil Aircraft for the Regular Investigation of the Atmosphere Based on
an Instrument Container (CARIBIC) project investigates physical and chemical
processes in the Earth's atmosphere using a Lufthansa Airbus long-distance
passenger aircraft. After the beginning of the explosive eruption of the
Eyjafjallajökull volcano on Iceland on 14 April 2010, the first CARIBIC
volcano-specific measurement flight was carried out over the Baltic Sea and
Southern Sweden on 20 April. Two more flights followed: one over Ireland
and the Irish Sea on 16 May and the other over the Norwegian Sea on
19 May 2010. During these three special mission flights the CARIBIC
container proved its merits as a comprehensive flying laboratory. The
elemental composition of particles collected over the Baltic Sea during the
first flight (20 April) indicated the presence of volcanic ash. Over
Northern Ireland and the Irish Sea (16 May), the DOAS system detected
SO2 and BrO co-located with volcanic ash particles that
increased the aerosol optical depth. Over the Norwegian Sea (19 May), the
optical particle counter detected a strong increase of particles larger than
400 nm diameter in a region where ash clouds were predicted by
aerosol dispersion models. Aerosol particle samples collected over the
Irish Sea and the Norwegian Sea showed large relative enhancements of the
elements silicon, iron, titanium and calcium. Non-methane hydrocarbon
concentrations in whole air samples collected on 16 and 19 May 2010
showed a pattern of removal of several hydrocarbons that is typical for
chlorine chemistry in the volcanic clouds. Comparisons of measured ash
concentrations and simulations with the FLEXPART dispersion model
demonstrate the difficulty of detailed volcanic ash dispersion modelling due
to the large variability of the volcanic cloud sources, extent and
patchiness as well as the thin ash layers formed in the volcanic clouds. |
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