Physical and optical properties of 2010 Eyjafjallajökull volcanic eruption aerosol: ground-based, Lidar and airborne measurements in France
International audience During the Eyjafjallajökull eruption (14 April to 24 May 2010), the volcanic aerosol cloud was observed across Europe by several airborne in situ and ground-based remote-sensing instruments. On 18 and 19 May, layers of depolarizing particles (i.e. non-spherical particles) were...
Published in: | Atmospheric Chemistry and Physics |
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Main Authors: | , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2012
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Online Access: | https://doi.org/10.5194/acp-12-1721-2012 https://hal.archives-ouvertes.fr/hal-00675317/file/acp-12-1721-2012.pdf https://hal.archives-ouvertes.fr/hal-00675317 |
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geo envir |
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geo envir Hervo, M. Quennehen, Boris Kristiansen, N. I. Boulon, J. Stohl, A. Fréville, P. Pichon, Jean-Marc Picard, David Labazuy, Philippe Gouhier, M. Roger, Jean-Claude Colomb, Aurélie Schwarzenboeck, Alfons Sellegri, Karine Physical and optical properties of 2010 Eyjafjallajökull volcanic eruption aerosol: ground-based, Lidar and airborne measurements in France |
topic_facet |
geo envir |
description |
International audience During the Eyjafjallajökull eruption (14 April to 24 May 2010), the volcanic aerosol cloud was observed across Europe by several airborne in situ and ground-based remote-sensing instruments. On 18 and 19 May, layers of depolarizing particles (i.e. non-spherical particles) were detected in the free troposphere above the Puy de Dôme station, (PdD, France) with a Rayleigh-Mie LIDAR emitting at a wavelength of 355 nm, with parallel and crossed polarization channels. These layers in the free troposphere (FT) were also well captured by simulations with the Lagrangian particle dispersion model FLEXPART, which furthermore showed that the ash was eventually entrained into the planetary boundary layer (PBL). Indeed, the ash cloud was then detected and characterized with a comprehensive set of in situ instruments at the Puy de Dôme station (PdD). In agreement with the FLEXPART simulation, up to 65 μg m−3 of particle mass and 2.2 ppb of SO2 were measured at PdD, corresponding to concentrations higher than the 95 percentile of 2 yr of measurements at PdD. Moreover, the number concentration of particles increased to 24 000 cm−3, mainly in the submicronic mode, but a supermicronic mode was also detected with a modal diameter of 2 μm. The resulting optical properties of the ash aerosol were characterized by a low scattering Ångström exponent (0.98), showing the presence of supermicronic particles. For the first time to our knowledge, the combination of in situ optical and physical characterization of the volcanic ash allowed the calculation of the mass-to-extinction ratio (η) with no assumptions on the aerosol density. The mass-to-extinction ratio was found to be significantly different from the background boundary layer aerosol (max: 1.57 g m−2 as opposed to 0.33 ± 0.03 g m−2). Using this ratio, ash mass concentration in the volcanic plume derived from LIDAR measurements was found to be 655 ± 23 μg m−3 when the plume was located in the FT (3000 m above the sea level - a.s.l.). This ratio could also be ... |
author2 |
Laboratoire de météorologie physique (LaMP) Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS) TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Norwegian Institute for Air Research (NILU) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP) Laboratoire Magmas et Volcans (LMV) Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet Saint-Étienne (UJM)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Hervo, M. Quennehen, Boris Kristiansen, N. I. Boulon, J. Stohl, A. Fréville, P. Pichon, Jean-Marc Picard, David Labazuy, Philippe Gouhier, M. Roger, Jean-Claude Colomb, Aurélie Schwarzenboeck, Alfons Sellegri, Karine |
author_facet |
Hervo, M. Quennehen, Boris Kristiansen, N. I. Boulon, J. Stohl, A. Fréville, P. Pichon, Jean-Marc Picard, David Labazuy, Philippe Gouhier, M. Roger, Jean-Claude Colomb, Aurélie Schwarzenboeck, Alfons Sellegri, Karine |
author_sort |
Hervo, M. |
title |
Physical and optical properties of 2010 Eyjafjallajökull volcanic eruption aerosol: ground-based, Lidar and airborne measurements in France |
title_short |
Physical and optical properties of 2010 Eyjafjallajökull volcanic eruption aerosol: ground-based, Lidar and airborne measurements in France |
title_full |
Physical and optical properties of 2010 Eyjafjallajökull volcanic eruption aerosol: ground-based, Lidar and airborne measurements in France |
title_fullStr |
Physical and optical properties of 2010 Eyjafjallajökull volcanic eruption aerosol: ground-based, Lidar and airborne measurements in France |
title_full_unstemmed |
Physical and optical properties of 2010 Eyjafjallajökull volcanic eruption aerosol: ground-based, Lidar and airborne measurements in France |
title_sort |
physical and optical properties of 2010 eyjafjallajökull volcanic eruption aerosol: ground-based, lidar and airborne measurements in france |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://doi.org/10.5194/acp-12-1721-2012 https://hal.archives-ouvertes.fr/hal-00675317/file/acp-12-1721-2012.pdf https://hal.archives-ouvertes.fr/hal-00675317 |
genre |
Eyjafjallajökull |
genre_facet |
Eyjafjallajökull |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics Atmospheric Chemistry and Physics, European Geosciences Union, 2012, 12 (4), pp.1721-1736. ⟨10.5194/acp-12-1721-2012⟩ |
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hal-00675317 doi:10.5194/acp-12-1721-2012 10670/1.bsbg9q https://hal.archives-ouvertes.fr/hal-00675317/file/acp-12-1721-2012.pdf https://hal.archives-ouvertes.fr/hal-00675317 |
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op_doi |
https://doi.org/10.5194/acp-12-1721-2012 |
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Atmospheric Chemistry and Physics |
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fttriple:oai:gotriple.eu:10670/1.bsbg9q 2023-05-15T16:09:33+02:00 Physical and optical properties of 2010 Eyjafjallajökull volcanic eruption aerosol: ground-based, Lidar and airborne measurements in France Hervo, M. Quennehen, Boris Kristiansen, N. I. Boulon, J. Stohl, A. Fréville, P. Pichon, Jean-Marc Picard, David Labazuy, Philippe Gouhier, M. Roger, Jean-Claude Colomb, Aurélie Schwarzenboeck, Alfons Sellegri, Karine Laboratoire de météorologie physique (LaMP) Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS) TROPO - LATMOS Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Norwegian Institute for Air Research (NILU) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP) Laboratoire Magmas et Volcans (LMV) Institut national des sciences de l'Univers (INSU - CNRS)-Université Jean Monnet Saint-Étienne (UJM)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2012-01-01 https://doi.org/10.5194/acp-12-1721-2012 https://hal.archives-ouvertes.fr/hal-00675317/file/acp-12-1721-2012.pdf https://hal.archives-ouvertes.fr/hal-00675317 en eng HAL CCSD European Geosciences Union hal-00675317 doi:10.5194/acp-12-1721-2012 10670/1.bsbg9q https://hal.archives-ouvertes.fr/hal-00675317/file/acp-12-1721-2012.pdf https://hal.archives-ouvertes.fr/hal-00675317 other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics Atmospheric Chemistry and Physics, European Geosciences Union, 2012, 12 (4), pp.1721-1736. ⟨10.5194/acp-12-1721-2012⟩ geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2012 fttriple https://doi.org/10.5194/acp-12-1721-2012 2023-01-22T17:38:54Z International audience During the Eyjafjallajökull eruption (14 April to 24 May 2010), the volcanic aerosol cloud was observed across Europe by several airborne in situ and ground-based remote-sensing instruments. On 18 and 19 May, layers of depolarizing particles (i.e. non-spherical particles) were detected in the free troposphere above the Puy de Dôme station, (PdD, France) with a Rayleigh-Mie LIDAR emitting at a wavelength of 355 nm, with parallel and crossed polarization channels. These layers in the free troposphere (FT) were also well captured by simulations with the Lagrangian particle dispersion model FLEXPART, which furthermore showed that the ash was eventually entrained into the planetary boundary layer (PBL). Indeed, the ash cloud was then detected and characterized with a comprehensive set of in situ instruments at the Puy de Dôme station (PdD). In agreement with the FLEXPART simulation, up to 65 μg m−3 of particle mass and 2.2 ppb of SO2 were measured at PdD, corresponding to concentrations higher than the 95 percentile of 2 yr of measurements at PdD. Moreover, the number concentration of particles increased to 24 000 cm−3, mainly in the submicronic mode, but a supermicronic mode was also detected with a modal diameter of 2 μm. The resulting optical properties of the ash aerosol were characterized by a low scattering Ångström exponent (0.98), showing the presence of supermicronic particles. For the first time to our knowledge, the combination of in situ optical and physical characterization of the volcanic ash allowed the calculation of the mass-to-extinction ratio (η) with no assumptions on the aerosol density. The mass-to-extinction ratio was found to be significantly different from the background boundary layer aerosol (max: 1.57 g m−2 as opposed to 0.33 ± 0.03 g m−2). Using this ratio, ash mass concentration in the volcanic plume derived from LIDAR measurements was found to be 655 ± 23 μg m−3 when the plume was located in the FT (3000 m above the sea level - a.s.l.). This ratio could also be ... Article in Journal/Newspaper Eyjafjallajökull Unknown Atmospheric Chemistry and Physics 12 4 1721 1736 |