Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements
International audience In this paper, an UV-polarization Lidar is used to study the optical properties of volcanic aerosol in the troposphere. The particles were released by the mid-April 2010 eruption of the Eyjafjallajökull volcano (63.63°N, 19.62°W, Iceland) and passed in the troposphere above Ly...
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Online Access: | https://hal.science/hal-00676487 https://doi.org/10.1016/j.atmosenv.2011.03.057 |
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ftunivlyon:oai:HAL:hal-00676487v1 2024-02-27T08:40:19+00:00 Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements Miffre, Alain David, Gregory Thomas, Benjamin Rairoux, Patrick Fjaeraa, A. M. Kristiansen, N. I. Stohl, A. Spectrométrie et Télédétection de l'Atmosphère Laboratoire de Spectrométrie Ionique et Moléculaire (LASIM) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) Norwegian Institute for Air Research (NILU) 2011-04-20 https://hal.science/hal-00676487 https://doi.org/10.1016/j.atmosenv.2011.03.057 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.atmosenv.2011.03.057 hal-00676487 https://hal.science/hal-00676487 doi:10.1016/j.atmosenv.2011.03.057 ISSN: 0004-6981 Atmospheric environment https://hal.science/hal-00676487 Atmospheric environment, 2011, 48, pp.76-84. ⟨10.1016/j.atmosenv.2011.03.057⟩ Volcanic ash Lidar Depolarization Dispersion model info:eu-repo/semantics/article Journal articles 2011 ftunivlyon https://doi.org/10.1016/j.atmosenv.2011.03.057 2024-01-31T17:36:40Z International audience In this paper, an UV-polarization Lidar is used to study the optical properties of volcanic aerosol in the troposphere. The particles were released by the mid-April 2010 eruption of the Eyjafjallajökull volcano (63.63°N, 19.62°W, Iceland) and passed in the troposphere above Lyon (45.76°N, 4.83°E, France) after advection over 2600 km. The FLEXPART particle dispersion model was applied to simulate the volcanic ash transport from Iceland to South West Europe, at the border of the air traffic closure area. Time-altitude plots of FLEXPART ash concentrations as well as of aerosol backscattering are presented, showing the arrival of volcanic particles in the troposphere above Lyon and their mixing into the planetary boundary layer. The particle UV-backscattering coefficient was typically 4 Mm−1 sr−1 and highly sensitive and accurate particle UV-depolarization measurements were performed, with depolarization ranging from a few to 44%. After few days long-range transport, observed ash particles are still non spherical. The observed variations of the backscattering and depolarization coefficients can be attributed to variations in the volcanic particles content. Ash mass concentrations are then retrieved. Moreover, a partitioning into spherical and non spherical particles is evaluated from number concentration ratios between solid ash particles and spherical hydrated sulfate particles. The microphysical properties of volcanic particles can thus be studied by associating an UV-polarization remote sensing instrument with a numerical volcanic ash dispersion model. Highlights - Volcanic ash particles concentration is measured by ground-based Lidar in troposphere. - Coupling with FLEXPART ash transport model allows to identify volcanic ash particles. - Precise UV-depolarization data allows to discern spherical/non spherical particles. - Phase partitioning between non spherical ash and spherical sulfates is thus evaluated. - After long-range advection, PBL ash particles are low concentrated and still ... Article in Journal/Newspaper Eyjafjallajökull Iceland Université de Lyon: HAL Atmospheric Environment 48 76 84 |
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Open Polar |
collection |
Université de Lyon: HAL |
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ftunivlyon |
language |
English |
topic |
Volcanic ash Lidar Depolarization Dispersion model |
spellingShingle |
Volcanic ash Lidar Depolarization Dispersion model Miffre, Alain David, Gregory Thomas, Benjamin Rairoux, Patrick Fjaeraa, A. M. Kristiansen, N. I. Stohl, A. Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements |
topic_facet |
Volcanic ash Lidar Depolarization Dispersion model |
description |
International audience In this paper, an UV-polarization Lidar is used to study the optical properties of volcanic aerosol in the troposphere. The particles were released by the mid-April 2010 eruption of the Eyjafjallajökull volcano (63.63°N, 19.62°W, Iceland) and passed in the troposphere above Lyon (45.76°N, 4.83°E, France) after advection over 2600 km. The FLEXPART particle dispersion model was applied to simulate the volcanic ash transport from Iceland to South West Europe, at the border of the air traffic closure area. Time-altitude plots of FLEXPART ash concentrations as well as of aerosol backscattering are presented, showing the arrival of volcanic particles in the troposphere above Lyon and their mixing into the planetary boundary layer. The particle UV-backscattering coefficient was typically 4 Mm−1 sr−1 and highly sensitive and accurate particle UV-depolarization measurements were performed, with depolarization ranging from a few to 44%. After few days long-range transport, observed ash particles are still non spherical. The observed variations of the backscattering and depolarization coefficients can be attributed to variations in the volcanic particles content. Ash mass concentrations are then retrieved. Moreover, a partitioning into spherical and non spherical particles is evaluated from number concentration ratios between solid ash particles and spherical hydrated sulfate particles. The microphysical properties of volcanic particles can thus be studied by associating an UV-polarization remote sensing instrument with a numerical volcanic ash dispersion model. Highlights - Volcanic ash particles concentration is measured by ground-based Lidar in troposphere. - Coupling with FLEXPART ash transport model allows to identify volcanic ash particles. - Precise UV-depolarization data allows to discern spherical/non spherical particles. - Phase partitioning between non spherical ash and spherical sulfates is thus evaluated. - After long-range advection, PBL ash particles are low concentrated and still ... |
author2 |
Spectrométrie et Télédétection de l'Atmosphère Laboratoire de Spectrométrie Ionique et Moléculaire (LASIM) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) Norwegian Institute for Air Research (NILU) |
format |
Article in Journal/Newspaper |
author |
Miffre, Alain David, Gregory Thomas, Benjamin Rairoux, Patrick Fjaeraa, A. M. Kristiansen, N. I. Stohl, A. |
author_facet |
Miffre, Alain David, Gregory Thomas, Benjamin Rairoux, Patrick Fjaeraa, A. M. Kristiansen, N. I. Stohl, A. |
author_sort |
Miffre, Alain |
title |
Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements |
title_short |
Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements |
title_full |
Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements |
title_fullStr |
Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements |
title_full_unstemmed |
Volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by UV-Lidar measurements |
title_sort |
volcanic aerosol optical properties and phase partitioning behavior after long-range advection characterized by uv-lidar measurements |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-00676487 https://doi.org/10.1016/j.atmosenv.2011.03.057 |
genre |
Eyjafjallajökull Iceland |
genre_facet |
Eyjafjallajökull Iceland |
op_source |
ISSN: 0004-6981 Atmospheric environment https://hal.science/hal-00676487 Atmospheric environment, 2011, 48, pp.76-84. ⟨10.1016/j.atmosenv.2011.03.057⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.atmosenv.2011.03.057 hal-00676487 https://hal.science/hal-00676487 doi:10.1016/j.atmosenv.2011.03.057 |
op_doi |
https://doi.org/10.1016/j.atmosenv.2011.03.057 |
container_title |
Atmospheric Environment |
container_volume |
48 |
container_start_page |
76 |
op_container_end_page |
84 |
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1792047425228111872 |