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∘ S, 14∘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 c...
Published in: | Atmospheric Chemistry and Physics |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2018
|
Subjects: | |
Online Access: | https://doi.org/10.5194/acp-18-17003-2018 https://noa.gwlb.de/receive/cop_mods_00041339 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040959/acp-18-17003-2018.pdf https://acp.copernicus.org/articles/18/17003/2018/acp-18-17003-2018.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00041339 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00041339 2023-05-15T18:21:10+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, Anaïs Gaimoz, Cécile Broccardo, Stephen Walton, Nicola Desboeufs, Karine Siour, Guillaume Hanghome, Mattheus Mafwila, Samuel Omoregie, Edosa Junkermann, Wolfgang Maenhaut, Willy 2018-11 electronic https://doi.org/10.5194/acp-18-17003-2018 https://noa.gwlb.de/receive/cop_mods_00041339 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040959/acp-18-17003-2018.pdf https://acp.copernicus.org/articles/18/17003/2018/acp-18-17003-2018.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-18-17003-2018 https://noa.gwlb.de/receive/cop_mods_00041339 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040959/acp-18-17003-2018.pdf https://acp.copernicus.org/articles/18/17003/2018/acp-18-17003-2018.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2018 ftnonlinearchiv https://doi.org/10.5194/acp-18-17003-2018 2022-02-08T22:41:40Z Continuous measurements between July 2012 and December 2015 at the Henties Bay Aerosol Observatory (HBAO; 22∘ S, 14∘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 Niedersächsisches Online-Archiv NOA Austral Atmospheric Chemistry and Physics 18 23 17003 17016 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Formenti, Paola Piketh, Stuart John Namwoonde, Andreas Klopper, Danitza Burger, Roelof Cazaunau, Mathieu Feron, Anaïs Gaimoz, Cécile 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 |
article Verlagsveröffentlichung |
description |
Continuous measurements between July 2012 and December 2015 at the Henties Bay Aerosol Observatory (HBAO; 22∘ S, 14∘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, Anaïs Gaimoz, Cécile 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, Anaïs Gaimoz, Cécile 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 |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-18-17003-2018 https://noa.gwlb.de/receive/cop_mods_00041339 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040959/acp-18-17003-2018.pdf https://acp.copernicus.org/articles/18/17003/2018/acp-18-17003-2018.pdf |
geographic |
Austral |
geographic_facet |
Austral |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-18-17003-2018 https://noa.gwlb.de/receive/cop_mods_00041339 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00040959/acp-18-17003-2018.pdf https://acp.copernicus.org/articles/18/17003/2018/acp-18-17003-2018.pdf |
op_rights |
uneingeschränkt 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_ |
1766200299894079488 |