Eyjafjallajökull ash concentrations derived from both lidar and modeling

Patrick Chazette; Marc Bocquet; P. Royer; Victor Winiarek; Jean-Christophe Raut; P. Labazuy; M. Gouhier; M. Lardier; J.-P. Cariou

hal-00643869, version 1

Eyjafjallajökull ash concentrations derived from both lidar and modeling

Patrick Chazette ¹, Marc Bocquet ^2, 3, P. Royer ^1, 4, Victor Winiarek ², Jean-Christophe Raut () ^5, 6, P. Labazuy ⁷, M. Gouhier ⁷, M. Lardier ⁴, J.-P. Cariou ⁴

Journal of Geophysical Research 117 (2012) D00U14

Résumé : Following the eruption of the Icelandic volcano Eyjafjallajökull on the 14 April 2010, ground-based N2-Raman lidar (GBL) measurements were used to trace the temporal evolution of the ash plume from 16 to 20 April 2010 above the southwestern suburb of Paris. The nighttime overpass of the Cloud-Aerosol LIdar with Orthogonal Polarization onboard Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation satellite (CALIPSO/CALIOP) on 17 April 2010 was an opportunity to complement GBL observations. The plume shape retrieved from GBL has been used to assess the size range of the particles size. The lidar-derived aerosol mass concentrations (PM) have been compared with model-derived PM concentrations held in the Eulerian model Polair3D transport model, driven by a source term inferred from the SEVIRI sensor onboard Meteosat satellite. The consistency between model and ground-based wind lidar and CALIOP observations has been checked. The spatial and temporal structures of the ash plume as estimated by each instrument and by the Polair3D simulations are in agreement. The ash plume was associated with a mean aerosol optical thickness of 0.1{plus minus}0.06 and 0.055{plus minus}0.053 for GBL (355 nm) and CALIOP (532 nm), respectively. Such values correspond to ash mass concentrations of ~400{plus minus}160 and ~720{plus minus}670 µg m-3, respectively, within the ash plume, which was lower than 0.5 km in width. The relative uncertainty is ~75% and mainly due to the assessment of the specific cross-section assuming an aerosol density of 2.6 g cm-3. The simulated ash plume is smoother leading to integrated mass of the same order of magnitude (between 50 and 250 mg m-2)

1 : Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE)
CNRS : UMR8212 – CEA : DSM/LSCE – Université de Versailles Saint-Quentin-en-Yvelines
2 : Centre d'Enseignement et de Recherche en Environnement Atmosphérique (CEREA)
EDF – Ecole des Ponts ParisTech
3 : CLIME (INRIA Rocquencourt)
INRIA – Ecole des Ponts ParisTech
4 : LEOSPHERE France
LEOSPHERE
5 : Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS)
CNRS : UMR8190 – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Versailles Saint-Quentin-en-Yvelines – INSU
6 : Institut Pierre-Simon-Laplace (IPSL)
CNRS : FR636 – Institut de recherche pour le développement [IRD] – CEA – CNES – INSU – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Versailles Saint-Quentin-en-Yvelines – Ecole normale supérieure de Paris - ENS Paris
7 : Observatoire de physique du globe de Clermont-Ferrand (OPGCF)
CNRS : UMS833 – INSU – Université Blaise Pascal - Clermont-Ferrand II

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Contributeur : Catherine Cardon <>
Soumis le : Mercredi 23 Novembre 2011, 09:41:58
Dernière modification le : Vendredi 14 Décembre 2012, 14:53:31

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DOI : 10.1029/2011JD015755

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%% hal-00643869, version 1
%% http://hal.archives-ouvertes.fr/hal-00643869
@article{chazette:hal-00643869,
    hal_id = {hal-00643869},
    url = {http://hal.archives-ouvertes.fr/hal-00643869},
    title = {{Eyjafjallaj{\"o}kull ash concentrations derived from both lidar and modeling}},
    author = {Chazette, Patrick and Bocquet, Marc and Royer, P. and Winiarek, Victor and Raut, Jean-Christophe and Labazuy, P. and Gouhier, M. and Lardier, M. and Cariou, J.-P.},
    abstract = {{Following the eruption of the Icelandic volcano Eyjafjallaj{\"o}kull on the 14 April 2010, ground-based N2-Raman lidar (GBL) measurements were used to trace the temporal evolution of the ash plume from 16 to 20 April 2010 above the southwestern suburb of Paris. The nighttime overpass of the Cloud-Aerosol LIdar with Orthogonal Polarization onboard Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation satellite (CALIPSO/CALIOP) on 17 April 2010 was an opportunity to complement GBL observations. The plume shape retrieved from GBL has been used to assess the size range of the particles size. The lidar-derived aerosol mass concentrations (PM) have been compared with model-derived PM concentrations held in the Eulerian model Polair3D transport model, driven by a source term inferred from the SEVIRI sensor onboard Meteosat satellite. The consistency between model and ground-based wind lidar and CALIOP observations has been checked. The spatial and temporal structures of the ash plume as estimated by each instrument and by the Polair3D simulations are in agreement. The ash plume was associated with a mean aerosol optical thickness of 0.1{plus minus}0.06 and 0.055{plus minus}0.053 for GBL (355 nm) and CALIOP (532 nm), respectively. Such values correspond to ash mass concentrations of \~400{plus minus}160 and \~720{plus minus}670 µg m-3, respectively, within the ash plume, which was lower than 0.5 km in width. The relative uncertainty is \~75\% and mainly due to the assessment of the specific cross-section assuming an aerosol density of 2.6 g cm-3. The simulated ash plume is smoother leading to integrated mass of the same order of magnitude (between 50 and 250 mg m-2)}},
    keywords = {Eyjafjallaj{\"o}kull;Ash concentration;Lidar;Modeling;Volcano},
    language = {Anglais},
    affiliation = {Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] - LSCE , Centre d'Enseignement et de Recherche en Environnement Atmosph{\'e}rique - CEREA , CLIME - INRIA Rocquencourt , LEOSPHERE France , Laboratoire Atmosph{\`e}res, Milieux, Observations Spatiales - LATMOS , Institut Pierre-Simon-Laplace - IPSL , Observatoire de physique du globe de Clermont-Ferrand - OPGCF},
    pages = {D00U14},
    journal = {Journal of Geophysical Research},
    volume = {117},
    audience = {internationale },
    doi = {10.1029/2011JD015755 },
    year = {2012},
}

%F hal-00643869, version 1
%0 Journal Article
%U http://hal.archives-ouvertes.fr/hal-00643869
%2 PHYS:PHYS:PHYS_AO-PH;SDU:STU:VO;SDU:OCEAN;SDE:MCG
%T Eyjafjallajökull ash concentrations derived from both lidar and modeling
%A Chazette, Patrick
%A Bocquet, Marc
%A Royer, P.
%A Winiarek, Victor
%A Raut, Jean-Christophe
%A Labazuy, P.
%A Gouhier, M.
%A Lardier, M.
%A Cariou, J.-P.
%+ Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] - LSCE , Centre d'Enseignement et de Recherche en Environnement Atmosphérique - CEREA , CLIME - INRIA Rocquencourt , LEOSPHERE France , Laboratoire Atmosphères, Milieux, Observations Spatiales - LATMOS , Institut Pierre-Simon-Laplace - IPSL , Observatoire de physique du globe de Clermont-Ferrand - OPGCF
%Z tact
%X Following the eruption of the Icelandic volcano Eyjafjallajökull on the 14 April 2010, ground-based N2-Raman lidar (GBL) measurements were used to trace the temporal evolution of the ash plume from 16 to 20 April 2010 above the southwestern suburb of Paris. The nighttime overpass of the Cloud-Aerosol LIdar with Orthogonal Polarization onboard Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation satellite (CALIPSO/CALIOP) on 17 April 2010 was an opportunity to complement GBL observations. The plume shape retrieved from GBL has been used to assess the size range of the particles size. The lidar-derived aerosol mass concentrations (PM) have been compared with model-derived PM concentrations held in the Eulerian model Polair3D transport model, driven by a source term inferred from the SEVIRI sensor onboard Meteosat satellite. The consistency between model and ground-based wind lidar and CALIOP observations has been checked. The spatial and temporal structures of the ash plume as estimated by each instrument and by the Polair3D simulations are in agreement. The ash plume was associated with a mean aerosol optical thickness of 0.1{plus minus}0.06 and 0.055{plus minus}0.053 for GBL (355 nm) and CALIOP (532 nm), respectively. Such values correspond to ash mass concentrations of ~400{plus minus}160 and ~720{plus minus}670 µg m-3, respectively, within the ash plume, which was lower than 0.5 km in width. The relative uncertainty is ~75% and mainly due to the assessment of the specific cross-section assuming an aerosol density of 2.6 g cm-3. The simulated ash plume is smoother leading to integrated mass of the same order of magnitude (between 50 and 250 mg m-2)
%G Anglais
%R 10.1029/2011JD015755
%J Journal of Geophysical Research
%2 internationale
%8 2012-00-00
%V 117
%P D00U14
%K Eyjafjallajökull;Ash concentration;Lidar;Modeling;Volcano

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