A comparison of atmospheric dispersion model predictions with observations of SO2 and sulphate aerosol from volcanic eruptions
The UK Met Office's Numerical Atmospheric-dispersion Modeling Environment (NAME) is used both operationally and for research investigations. It has previously been used to model volcanic ash at the London Volcanic Ash Advisory Centre (VAAC), including that from the eruptions in Iceland of Eyjaf...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/129102 2023-05-15T16:09:31+02:00 A comparison of atmospheric dispersion model predictions with observations of SO2 and sulphate aerosol from volcanic eruptions Heard, Imogen P. C. Manning, Alistair J. Haywood, James M. Witham, Claire Redington, Alison Jones, Andy Clarisse, Lieven Bourassa, Adam 2012 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/129102 https://dipot.ulb.ac.be/dspace/bitstream/2013/129102/1/HeardJGR2012.pdf en eng uri/info:doi/10.1029/2011JD016791 uri/info:scp/84859467819 https://dipot.ulb.ac.be/dspace/bitstream/2013/129102/1/HeardJGR2012.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/129102 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Journal of geophysical research, 117 (6 Sciences de la terre et du cosmos Télédétection Phénomènes atmosphériques info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2012 ftunivbruxelles 2022-06-12T21:18:41Z The UK Met Office's Numerical Atmospheric-dispersion Modeling Environment (NAME) is used both operationally and for research investigations. It has previously been used to model volcanic ash at the London Volcanic Ash Advisory Centre (VAAC), including that from the eruptions in Iceland of Eyjafjallajökull in 2010 and Grímsvtn in 2011. In this paper, the ability of NAME to model the release and dispersion of volcanic SO2, the chemical processes leading to the production of sulphate aerosol, and the subsequent dispersion of sulphate aerosol, has been investigated. Sensitivity tests were carried out to investigate the suitability of the NAME chemistry scheme for use in both the troposphere and the stratosphere. The eruptions of Sarychev in 2009, Kasatochi in 2008 and Eyjafjallajökull in 2010 were simulated and results for SO2 column density and sulphate aerosol optical depth (AOD) were compared with satellite retrievals. NAME results compare favorably with available observations in terms of both geographical distribution and magnitude for all three cases. The NAME modeled values of SO2 show a correlation of 0.8 with the corresponding observations for Sarychev. Ninety percent of modeled values of northern hemisphere averaged sulphate AOD are within a factor of 2 of those observed for Kasatochi and 71% are within a factor of 2 of those observed for Sarychev. Although significant uncertainties are present in both the model and observations, this work demonstrates that NAME's current chemistry scheme shows promise as a tool for modeling SO2 and sulphate from volcanoes. © 2012 by the American Geophysical Union. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Eyjafjallajökull Iceland DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Sciences de la terre et du cosmos Télédétection Phénomènes atmosphériques |
spellingShingle |
Sciences de la terre et du cosmos Télédétection Phénomènes atmosphériques Heard, Imogen P. C. Manning, Alistair J. Haywood, James M. Witham, Claire Redington, Alison Jones, Andy Clarisse, Lieven Bourassa, Adam A comparison of atmospheric dispersion model predictions with observations of SO2 and sulphate aerosol from volcanic eruptions |
topic_facet |
Sciences de la terre et du cosmos Télédétection Phénomènes atmosphériques |
description |
The UK Met Office's Numerical Atmospheric-dispersion Modeling Environment (NAME) is used both operationally and for research investigations. It has previously been used to model volcanic ash at the London Volcanic Ash Advisory Centre (VAAC), including that from the eruptions in Iceland of Eyjafjallajökull in 2010 and Grímsvtn in 2011. In this paper, the ability of NAME to model the release and dispersion of volcanic SO2, the chemical processes leading to the production of sulphate aerosol, and the subsequent dispersion of sulphate aerosol, has been investigated. Sensitivity tests were carried out to investigate the suitability of the NAME chemistry scheme for use in both the troposphere and the stratosphere. The eruptions of Sarychev in 2009, Kasatochi in 2008 and Eyjafjallajökull in 2010 were simulated and results for SO2 column density and sulphate aerosol optical depth (AOD) were compared with satellite retrievals. NAME results compare favorably with available observations in terms of both geographical distribution and magnitude for all three cases. The NAME modeled values of SO2 show a correlation of 0.8 with the corresponding observations for Sarychev. Ninety percent of modeled values of northern hemisphere averaged sulphate AOD are within a factor of 2 of those observed for Kasatochi and 71% are within a factor of 2 of those observed for Sarychev. Although significant uncertainties are present in both the model and observations, this work demonstrates that NAME's current chemistry scheme shows promise as a tool for modeling SO2 and sulphate from volcanoes. © 2012 by the American Geophysical Union. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Heard, Imogen P. C. Manning, Alistair J. Haywood, James M. Witham, Claire Redington, Alison Jones, Andy Clarisse, Lieven Bourassa, Adam |
author_facet |
Heard, Imogen P. C. Manning, Alistair J. Haywood, James M. Witham, Claire Redington, Alison Jones, Andy Clarisse, Lieven Bourassa, Adam |
author_sort |
Heard, Imogen P. C. |
title |
A comparison of atmospheric dispersion model predictions with observations of SO2 and sulphate aerosol from volcanic eruptions |
title_short |
A comparison of atmospheric dispersion model predictions with observations of SO2 and sulphate aerosol from volcanic eruptions |
title_full |
A comparison of atmospheric dispersion model predictions with observations of SO2 and sulphate aerosol from volcanic eruptions |
title_fullStr |
A comparison of atmospheric dispersion model predictions with observations of SO2 and sulphate aerosol from volcanic eruptions |
title_full_unstemmed |
A comparison of atmospheric dispersion model predictions with observations of SO2 and sulphate aerosol from volcanic eruptions |
title_sort |
comparison of atmospheric dispersion model predictions with observations of so2 and sulphate aerosol from volcanic eruptions |
publishDate |
2012 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/129102 https://dipot.ulb.ac.be/dspace/bitstream/2013/129102/1/HeardJGR2012.pdf |
genre |
Eyjafjallajökull Iceland |
genre_facet |
Eyjafjallajökull Iceland |
op_source |
Journal of geophysical research, 117 (6 |
op_relation |
uri/info:doi/10.1029/2011JD016791 uri/info:scp/84859467819 https://dipot.ulb.ac.be/dspace/bitstream/2013/129102/1/HeardJGR2012.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/129102 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1766405386986848256 |