Three years of measurements of light-absorbing aerosols over coastal Namibia : seasonality, origin, and transport
Continuous measurements between July 2012 and December 2015 at the Henties Bay Aerosol Observatory (HBAO; 22 degrees S, 14 degrees 05' E), Namibia, show that, during the austral wintertime, transport of light-absorbing black carbon aerosols occurs at low level into the marine boundary layer. Th...
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ftunivgent:oai:archive.ugent.be:8598072 2023-06-11T04:16:42+02:00 Three years of measurements of light-absorbing aerosols over coastal Namibia : seasonality, origin, and transport Formenti, Paola Piketh, Stuart John Namwoonde, Andreas Klopper, Danitza Burger, Roelof Cazaunau, Mathieu Feron, Anais Gaimoz, Cecile Broccardo, Stephen Walton, Nicola Desboeufs, Karine Siour, Guillaume Hanghome, Mattheus Mafwila, Samuel Omoregie, Edosa Junkermann, Wolfgang Maenhaut, Willy 2018 application/pdf https://biblio.ugent.be/publication/8598072 http://hdl.handle.net/1854/LU-8598072 https://doi.org/10.5194/acp-18-17003-2018 https://biblio.ugent.be/publication/8598072/file/8598080 eng eng https://biblio.ugent.be/publication/8598072 http://hdl.handle.net/1854/LU-8598072 http://dx.doi.org/10.5194/acp-18-17003-2018 https://biblio.ugent.be/publication/8598072/file/8598080 No license (in copyright) info:eu-repo/semantics/openAccess ATMOSPHERIC CHEMISTRY AND PHYSICS ISSN: 1680-7316 ISSN: 1680-7324 Earth and Environmental Sciences Chemistry BLACK CARBON AEROSOL ATTENUATION CROSS-SECTION INITIATIVE SAFARI 2000 OPTICAL-PROPERTIES SOUTHERN AFRICA ABSORPTION-MEASUREMENTS BOUNDARY-LAYER MIXING STATE AETHALOMETER MASS journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivgent https://doi.org/10.5194/acp-18-17003-2018 2023-05-10T22:44:25Z Continuous measurements between July 2012 and December 2015 at the Henties Bay Aerosol Observatory (HBAO; 22 degrees S, 14 degrees 05' E), Namibia, show that, during the austral wintertime, transport of light-absorbing black carbon aerosols occurs at low level into the marine boundary layer. The average of daily concentrations of equivalent black carbon (eBC) over the whole sampling period is 53 (+/- 55) ng m(-3). Peak values above 200 ng m(-3) and up to 800 ng m(-3) occur seasonally from May to August, ahead of the dry season peak of biomass burning in southern Africa (August to October). Analysis of 3-day air mass back-trajectories show that air masses from the South Atlantic Ocean south of Henties Bay are generally cleaner than air having originated over the ocean north of Henties Bay, influenced by the outflow of the major biomass burning plume, and from the continent, where wildfires occur. Additional episodic peak concentrations, even for oceanic transport, indicate that pollution from distant sources in South Africa and maritime traffic along the Atlantic ship tracks could be important. While we expect the direct radiative effect to be negligible, the indirect effect on the microphysical properties of the stratocumulus clouds and the deposition to the ocean could be significant and deserve further investigation, specifically ahead of the dry season. Article in Journal/Newspaper South Atlantic Ocean Ghent University Academic Bibliography Austral Atmospheric Chemistry and Physics 18 23 17003 17016 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Earth and Environmental Sciences Chemistry BLACK CARBON AEROSOL ATTENUATION CROSS-SECTION INITIATIVE SAFARI 2000 OPTICAL-PROPERTIES SOUTHERN AFRICA ABSORPTION-MEASUREMENTS BOUNDARY-LAYER MIXING STATE AETHALOMETER MASS |
spellingShingle |
Earth and Environmental Sciences Chemistry BLACK CARBON AEROSOL ATTENUATION CROSS-SECTION INITIATIVE SAFARI 2000 OPTICAL-PROPERTIES SOUTHERN AFRICA ABSORPTION-MEASUREMENTS BOUNDARY-LAYER MIXING STATE AETHALOMETER MASS Formenti, Paola Piketh, Stuart John Namwoonde, Andreas Klopper, Danitza Burger, Roelof Cazaunau, Mathieu Feron, Anais Gaimoz, Cecile Broccardo, Stephen Walton, Nicola Desboeufs, Karine Siour, Guillaume Hanghome, Mattheus Mafwila, Samuel Omoregie, Edosa Junkermann, Wolfgang Maenhaut, Willy Three years of measurements of light-absorbing aerosols over coastal Namibia : seasonality, origin, and transport |
topic_facet |
Earth and Environmental Sciences Chemistry BLACK CARBON AEROSOL ATTENUATION CROSS-SECTION INITIATIVE SAFARI 2000 OPTICAL-PROPERTIES SOUTHERN AFRICA ABSORPTION-MEASUREMENTS BOUNDARY-LAYER MIXING STATE AETHALOMETER MASS |
description |
Continuous measurements between July 2012 and December 2015 at the Henties Bay Aerosol Observatory (HBAO; 22 degrees S, 14 degrees 05' E), Namibia, show that, during the austral wintertime, transport of light-absorbing black carbon aerosols occurs at low level into the marine boundary layer. The average of daily concentrations of equivalent black carbon (eBC) over the whole sampling period is 53 (+/- 55) ng m(-3). Peak values above 200 ng m(-3) and up to 800 ng m(-3) occur seasonally from May to August, ahead of the dry season peak of biomass burning in southern Africa (August to October). Analysis of 3-day air mass back-trajectories show that air masses from the South Atlantic Ocean south of Henties Bay are generally cleaner than air having originated over the ocean north of Henties Bay, influenced by the outflow of the major biomass burning plume, and from the continent, where wildfires occur. Additional episodic peak concentrations, even for oceanic transport, indicate that pollution from distant sources in South Africa and maritime traffic along the Atlantic ship tracks could be important. While we expect the direct radiative effect to be negligible, the indirect effect on the microphysical properties of the stratocumulus clouds and the deposition to the ocean could be significant and deserve further investigation, specifically ahead of the dry season. |
format |
Article in Journal/Newspaper |
author |
Formenti, Paola Piketh, Stuart John Namwoonde, Andreas Klopper, Danitza Burger, Roelof Cazaunau, Mathieu Feron, Anais Gaimoz, Cecile Broccardo, Stephen Walton, Nicola Desboeufs, Karine Siour, Guillaume Hanghome, Mattheus Mafwila, Samuel Omoregie, Edosa Junkermann, Wolfgang Maenhaut, Willy |
author_facet |
Formenti, Paola Piketh, Stuart John Namwoonde, Andreas Klopper, Danitza Burger, Roelof Cazaunau, Mathieu Feron, Anais Gaimoz, Cecile Broccardo, Stephen Walton, Nicola Desboeufs, Karine Siour, Guillaume Hanghome, Mattheus Mafwila, Samuel Omoregie, Edosa Junkermann, Wolfgang Maenhaut, Willy |
author_sort |
Formenti, Paola |
title |
Three years of measurements of light-absorbing aerosols over coastal Namibia : seasonality, origin, and transport |
title_short |
Three years of measurements of light-absorbing aerosols over coastal Namibia : seasonality, origin, and transport |
title_full |
Three years of measurements of light-absorbing aerosols over coastal Namibia : seasonality, origin, and transport |
title_fullStr |
Three years of measurements of light-absorbing aerosols over coastal Namibia : seasonality, origin, and transport |
title_full_unstemmed |
Three years of measurements of light-absorbing aerosols over coastal Namibia : seasonality, origin, and transport |
title_sort |
three years of measurements of light-absorbing aerosols over coastal namibia : seasonality, origin, and transport |
publishDate |
2018 |
url |
https://biblio.ugent.be/publication/8598072 http://hdl.handle.net/1854/LU-8598072 https://doi.org/10.5194/acp-18-17003-2018 https://biblio.ugent.be/publication/8598072/file/8598080 |
geographic |
Austral |
geographic_facet |
Austral |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
ATMOSPHERIC CHEMISTRY AND PHYSICS ISSN: 1680-7316 ISSN: 1680-7324 |
op_relation |
https://biblio.ugent.be/publication/8598072 http://hdl.handle.net/1854/LU-8598072 http://dx.doi.org/10.5194/acp-18-17003-2018 https://biblio.ugent.be/publication/8598072/file/8598080 |
op_rights |
No license (in copyright) info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-18-17003-2018 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
18 |
container_issue |
23 |
container_start_page |
17003 |
op_container_end_page |
17016 |
_version_ |
1768375200529776640 |