 |
| Titel |
The CARIBIC aircraft as a versatile tool for measuring Eyjafjallajökull's volcanic plumes in April/May 2010 |
| VerfasserIn |
Armin Rauthe-Schöch, Tanja J. Schuck, Angela K. Baker, Andreas Weigelt, Markus Hermann, Bengt G. Martinsson, Klaus-Peter Heue, Carl A. M. Brenninkmeijer, Sabine Eckhardt |
| Konferenz |
EGU General Assembly 2011
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250052015
|
|
|
|
|
|
| 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 A340 long-distance passenger aircraft. After the
explosive eruption of the Eyjafjallajökull volcano on Iceland began on 14 April 2010, the
first CARIBIC measurement flight was carried out over the Baltic Sea and Southern Sweden
on 20Â April. Two more flights followed: one over Ireland and the Irish Sea on 16Â May
and one over the Norwegian Sea on 19 May 2010. All flights used the London
Volcanic Ash Advisory Centre (VAAC) and other aerosol dispersion model predictions
for the flight planning in order to intercept the ash plumes. During these flights
the CARIBIC container proved its merits as a versatile and comprehensive flying
laboratory.
Over Northern Ireland and the Irish Sea, the Differential Optical Absorption Spectroscopy
(DOAS) instrument detected SO2 and BrO colocated with volcanic ash particles that
increased the aerosol optical depth. Over the Norwegian Sea, the optical particle counter
detected a strong increase of particles larger than 400 nm in a region where ash
clouds were predicted by the London VAAC and the Norwegian Institute for Air
Research (NILU) FLEXPART model. Aerosol 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 May and 19 May 2010 showed the removal of
several hydrocarbons due to chlorine chemistry in the plumes. First comparisons of
measured ash concentrations and improved FLEXPART dispersion model simulations
demonstrate the large variability of the volcano plume and the thin layering of the ash
clouds. |
|
|
|
|
|
|