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Airborne aerosol in-situ observations of volcanic ash layers of the Eyjafjallajökull volcano in April & May, 2010, over central Europe

Minikin, Andreas and Weinzierl, Bernadett and Reitebuch, Oliver and Schlager, Hans and Scheibe, Monika and Lichtenstern, Michael and Stock, Paul and Baumann, Robert and Forster, Caroline and Sailer, Thomas and Hamburger, Thomas and Rahm, Stephan and Graf, Kaspar and Mannstein, Hermann and Schumann, Ulrich (2010) Airborne aerosol in-situ observations of volcanic ash layers of the Eyjafjallajökull volcano in April & May, 2010, over central Europe. International Aerosol Conference 2010, 27. Aug. - 3. Sep. 2010, Helsinki, Finnland. (Unpublished)

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Abstract

Between April 19 and May 18, 2010, altogether 17 flights were performed by the DLR Falcon research aircraft to survey and sample the emissions of the Eyjafjalla volcano on Iceland. The measurements were performed on request of the Deutscher Wetterdienst (DWD, German Weather Service) and the Bundesministerium für Verkehr, Bau und Stadtentwicklung (BMVBS, Federal Ministry of Transport, Building and Urban Development). The Falcon was instrumented with a downward looking, scanning 2-μm-wind-Lidar (providing qualitative aerosol backscatter as well as horizontal wind), and several in-situ instruments: The particle instrumentation, including wing station aerosol spectrometer probes (PCASP, FSSP-300, 2D-C) covered particle number and size from 5 nm to some tens of μm. Further in-situ instruments measured aerosol absorption (PSAP), O3, CO, SO2 and H2O mixing ratios and standard meteorological parameters. In this contribution we focus on the first results of the in-plume measurements of particle size distribution, total fine mode particle number concentrations and absorption coefficient and SO2. A key result is that the total volume and mass of (aged) volcanic ash is dominated by particles of some µm size, with only less than 10 percent typically residing in the size range below 2.5 μm particle diameter. Possible systematic errors due to counting statistics of large particles and uncertainties in refractive index, however, remain large at present.

Document Type:Conference or Workshop Item (Speech)
Title:Airborne aerosol in-situ observations of volcanic ash layers of the Eyjafjallajökull volcano in April & May, 2010, over central Europe
Authors:
AuthorsInstitution or Email of Authors
Minikin, AndreasUNSPECIFIED
Weinzierl, BernadettUNSPECIFIED
Reitebuch, OliverUNSPECIFIED
Schlager, HansUNSPECIFIED
Scheibe, MonikaUNSPECIFIED
Lichtenstern, MichaelUNSPECIFIED
Stock, PaulUNSPECIFIED
Baumann, RobertUNSPECIFIED
Forster, CarolineUNSPECIFIED
Sailer, ThomasUNSPECIFIED
Hamburger, ThomasUNSPECIFIED
Rahm, StephanUNSPECIFIED
Graf, KasparUNSPECIFIED
Mannstein, HermannUNSPECIFIED
Schumann, UlrichUNSPECIFIED
Date:31 August 2010
Status:Unpublished
Keywords:Eyjafjalla volcano, volcanic ash, aerosol, Falcon, Eyjafjallejökull
Event Title:International Aerosol Conference 2010
Event Location:Helsinki, Finnland
Event Type:international Conference
Event Dates:27. Aug. - 3. Sep. 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L -- no assignement
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Dr.rer.nat. Andreas Minikin
Deposited On:08 Dec 2010 16:24
Last Modified:08 Dec 2010 16:24

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