Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements
We document aerosol extinction properties in the southern Indian Ocean. A unique data set of shipborne measurements has been collected with a dual Rayleigh-Mie lidar aboard the research vessel Marion Dufresne during two campaigns: one around Madagascar during the Southern Hemisphere late summer and...
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ftarchimer:oai:archimer.ifremer.fr:20307 2023-05-15T17:02:07+02:00 Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements Duflot, V. Royer, P. Chazette, P. Baray, J-l. Courcoux, Y. Delmas, R. 2011-09 application/pdf https://archimer.ifremer.fr/doc/00092/20307/17962.pdf https://doi.org/10.1029/2011JD015839 https://archimer.ifremer.fr/doc/00092/20307/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00092/20307/17962.pdf doi:10.1029/2011JD015839 https://archimer.ifremer.fr/doc/00092/20307/ Copyright 2011 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use Journal Of Geophysical Research-atmospheres (0148-0227) (Amer Geophysical Union), 2011-09 , Vol. 116 , N. D18208 , P. 1-15 text Publication info:eu-repo/semantics/article 2011 ftarchimer https://doi.org/10.1029/2011JD015839 2021-09-23T20:21:05Z We document aerosol extinction properties in the southern Indian Ocean. A unique data set of shipborne measurements has been collected with a dual Rayleigh-Mie lidar aboard the research vessel Marion Dufresne during two campaigns: one around Madagascar during the Southern Hemisphere late summer and one close to the Kerguelen Islands during the biomass burning (BB) season. During this latter, a layer containing a mix of BB and marine aerosols extending up to similar to 3 km above mean sea level (amsl) has been observed from [31 degrees S, 69 degrees E] to [24 degrees S, 59 degrees E]. Both vertical structure and aerosol optical properties have been retrieved from the inversion of the lidar signals. Sun photometer-derived aerosol optical thickness (AOT) at 355 nm is used to constrain the lidar inversion. We obtain a mean integrated value of backscatter-to-extinction ratio (BER) (extinction-to-backscatter ratio, or so-called lidar ratio, LR) of 0.039 +/- 0.009 sr(-1) (26 +/- 6 sr) and 0.021 +/- 0.006 sr(-1) (48 +/- 12 sr) for the marine aerosols layer, and for the mixing between BB and marine aerosols with an uncertainty of 0.009 sr-1 (6 sr) and 0.004 sr(-1) (9 sr), respectively. Lidar calibration is used to inverse data without any simultaneous Sun photometer measurements (as nighttime data), and the temporal evolution of the optical properties and vertical extension of the BB aerosol plume is documented. The presence of BB aerosols is in agreement with Lagrangian model GIRAFE v3 (reGIonal ReAl time Fire plumEs) simulations, which show the South American and Southern African BB origin of the encountered aerosol layer. Article in Journal/Newspaper Kerguelen Islands Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Indian Kerguelen Kerguelen Islands Journal of Geophysical Research 116 D18 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
We document aerosol extinction properties in the southern Indian Ocean. A unique data set of shipborne measurements has been collected with a dual Rayleigh-Mie lidar aboard the research vessel Marion Dufresne during two campaigns: one around Madagascar during the Southern Hemisphere late summer and one close to the Kerguelen Islands during the biomass burning (BB) season. During this latter, a layer containing a mix of BB and marine aerosols extending up to similar to 3 km above mean sea level (amsl) has been observed from [31 degrees S, 69 degrees E] to [24 degrees S, 59 degrees E]. Both vertical structure and aerosol optical properties have been retrieved from the inversion of the lidar signals. Sun photometer-derived aerosol optical thickness (AOT) at 355 nm is used to constrain the lidar inversion. We obtain a mean integrated value of backscatter-to-extinction ratio (BER) (extinction-to-backscatter ratio, or so-called lidar ratio, LR) of 0.039 +/- 0.009 sr(-1) (26 +/- 6 sr) and 0.021 +/- 0.006 sr(-1) (48 +/- 12 sr) for the marine aerosols layer, and for the mixing between BB and marine aerosols with an uncertainty of 0.009 sr-1 (6 sr) and 0.004 sr(-1) (9 sr), respectively. Lidar calibration is used to inverse data without any simultaneous Sun photometer measurements (as nighttime data), and the temporal evolution of the optical properties and vertical extension of the BB aerosol plume is documented. The presence of BB aerosols is in agreement with Lagrangian model GIRAFE v3 (reGIonal ReAl time Fire plumEs) simulations, which show the South American and Southern African BB origin of the encountered aerosol layer. |
format |
Article in Journal/Newspaper |
author |
Duflot, V. Royer, P. Chazette, P. Baray, J-l. Courcoux, Y. Delmas, R. |
spellingShingle |
Duflot, V. Royer, P. Chazette, P. Baray, J-l. Courcoux, Y. Delmas, R. Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements |
author_facet |
Duflot, V. Royer, P. Chazette, P. Baray, J-l. Courcoux, Y. Delmas, R. |
author_sort |
Duflot, V. |
title |
Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements |
title_short |
Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements |
title_full |
Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements |
title_fullStr |
Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements |
title_full_unstemmed |
Marine and biomass burning aerosols in the southern Indian Ocean: Retrieval of aerosol optical properties from shipborne lidar and Sun photometer measurements |
title_sort |
marine and biomass burning aerosols in the southern indian ocean: retrieval of aerosol optical properties from shipborne lidar and sun photometer measurements |
publisher |
Amer Geophysical Union |
publishDate |
2011 |
url |
https://archimer.ifremer.fr/doc/00092/20307/17962.pdf https://doi.org/10.1029/2011JD015839 https://archimer.ifremer.fr/doc/00092/20307/ |
geographic |
Indian Kerguelen Kerguelen Islands |
geographic_facet |
Indian Kerguelen Kerguelen Islands |
genre |
Kerguelen Islands |
genre_facet |
Kerguelen Islands |
op_source |
Journal Of Geophysical Research-atmospheres (0148-0227) (Amer Geophysical Union), 2011-09 , Vol. 116 , N. D18208 , P. 1-15 |
op_relation |
https://archimer.ifremer.fr/doc/00092/20307/17962.pdf doi:10.1029/2011JD015839 https://archimer.ifremer.fr/doc/00092/20307/ |
op_rights |
Copyright 2011 by the American Geophysical Union. info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2011JD015839 |
container_title |
Journal of Geophysical Research |
container_volume |
116 |
container_issue |
D18 |
_version_ |
1766055362496036864 |