Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde
Ambient air is a core medium for monitoring of persistent organic pollutants (POPs) under the Stockholm Convention and is used in studies of global transports of POPs and their atmospheric sources and source regions. Still, data based on active air sampling remain scarce in many regions. The primary...
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Online Access: | http://hdl.handle.net/10852/61732 http://urn.nb.no/URN:NBN:no-64336 https://doi.org/10.1016/j.scitotenv.2017.08.217 |
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ftoslouniv:oai:www.duo.uio.no:10852/61732 2023-05-15T15:10:37+02:00 Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde Nøst, Therese Haugdahl Halse, Anne Karine Schlabach, Martin Bäcklund, Are Eckhardt, Sabine Breivik, Knut 2017-09-02T15:44:32Z http://hdl.handle.net/10852/61732 http://urn.nb.no/URN:NBN:no-64336 https://doi.org/10.1016/j.scitotenv.2017.08.217 EN eng Elsevier Science 213577 http://urn.nb.no/URN:NBN:no-64336 Nøst, Therese Haugdahl Halse, Anne Karine Schlabach, Martin Bäcklund, Are Eckhardt, Sabine Breivik, Knut . Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde. Science of the Total Environment. 2018, 612, 129-137 http://hdl.handle.net/10852/61732 1490539 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Science of the Total Environment&rft.volume=612&rft.spage=129&rft.date=2018 Science of the Total Environment 612 129 137 http://dx.doi.org/10.1016/j.scitotenv.2017.08.217 URN:NBN:no-64336 Fulltext https://www.duo.uio.no/bitstream/handle/10852/61732/2/THN%2Bet%2Bal-Low%2Bconcentrations%2Bof%2Bpersistent%2Borganic%2Bpollutants%2B%2528POPs%2529%2Bin%2Bair%2Bat%2BCape%2BVerde.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 0048-9697 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2017 ftoslouniv https://doi.org/10.1016/j.scitotenv.2017.08.217 2020-06-21T08:51:11Z Ambient air is a core medium for monitoring of persistent organic pollutants (POPs) under the Stockholm Convention and is used in studies of global transports of POPs and their atmospheric sources and source regions. Still, data based on active air sampling remain scarce in many regions. The primary objectives of this study were to (i) monitor concentrations of selected POPs in air outside West Africa, and (ii) to evaluate potential atmospheric processes and source regions affecting measured concentrations. For this purpose, an active high-volume air sampler was installed on the Cape Verde Atmospheric Observatory at Cape Verde outside the coast of West Africa. Sampling commenced in May 2012 and 43 samples (24 h sampling) were collected until June 2013. The samples were analyzed for selected polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), hexachlorobenzene (HCB) and chlordanes. The concentrations of these POPs at Cape Verde were generally low and comparable to remote sites in the Arctic for several compounds. Seasonal trends varied between compounds and concentrations exhibited strong temperature dependence for chlordanes. Our results indicate net volatilization fromthe Atlantic Ocean north of Cape Verde as sources of these POPs. Air mass back trajectories demonstrated that air masses measured at Cape Verdewere generally transported fromthe Atlantic Ocean or the North African continent. Overall, the low concentrations in air at Cape Verde were likely explained by absence of major emissions in areas from which the air masses originated combined with depletion during long-range atmospheric transport due to enhanced degradation under tropical conditions (high temperatures and concentrations of hydroxyl radicals). Article in Journal/Newspaper Arctic Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Science of The Total Environment 612 129 137 |
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Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
Ambient air is a core medium for monitoring of persistent organic pollutants (POPs) under the Stockholm Convention and is used in studies of global transports of POPs and their atmospheric sources and source regions. Still, data based on active air sampling remain scarce in many regions. The primary objectives of this study were to (i) monitor concentrations of selected POPs in air outside West Africa, and (ii) to evaluate potential atmospheric processes and source regions affecting measured concentrations. For this purpose, an active high-volume air sampler was installed on the Cape Verde Atmospheric Observatory at Cape Verde outside the coast of West Africa. Sampling commenced in May 2012 and 43 samples (24 h sampling) were collected until June 2013. The samples were analyzed for selected polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), hexachlorobenzene (HCB) and chlordanes. The concentrations of these POPs at Cape Verde were generally low and comparable to remote sites in the Arctic for several compounds. Seasonal trends varied between compounds and concentrations exhibited strong temperature dependence for chlordanes. Our results indicate net volatilization fromthe Atlantic Ocean north of Cape Verde as sources of these POPs. Air mass back trajectories demonstrated that air masses measured at Cape Verdewere generally transported fromthe Atlantic Ocean or the North African continent. Overall, the low concentrations in air at Cape Verde were likely explained by absence of major emissions in areas from which the air masses originated combined with depletion during long-range atmospheric transport due to enhanced degradation under tropical conditions (high temperatures and concentrations of hydroxyl radicals). |
format |
Article in Journal/Newspaper |
author |
Nøst, Therese Haugdahl Halse, Anne Karine Schlabach, Martin Bäcklund, Are Eckhardt, Sabine Breivik, Knut |
spellingShingle |
Nøst, Therese Haugdahl Halse, Anne Karine Schlabach, Martin Bäcklund, Are Eckhardt, Sabine Breivik, Knut Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde |
author_facet |
Nøst, Therese Haugdahl Halse, Anne Karine Schlabach, Martin Bäcklund, Are Eckhardt, Sabine Breivik, Knut |
author_sort |
Nøst, Therese Haugdahl |
title |
Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde |
title_short |
Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde |
title_full |
Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde |
title_fullStr |
Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde |
title_full_unstemmed |
Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde |
title_sort |
low concentrations of persistent organic pollutants (pops) in air at cape verde |
publisher |
Elsevier Science |
publishDate |
2017 |
url |
http://hdl.handle.net/10852/61732 http://urn.nb.no/URN:NBN:no-64336 https://doi.org/10.1016/j.scitotenv.2017.08.217 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
0048-9697 |
op_relation |
213577 http://urn.nb.no/URN:NBN:no-64336 Nøst, Therese Haugdahl Halse, Anne Karine Schlabach, Martin Bäcklund, Are Eckhardt, Sabine Breivik, Knut . Low concentrations of persistent organic pollutants (POPs) in air at Cape Verde. Science of the Total Environment. 2018, 612, 129-137 http://hdl.handle.net/10852/61732 1490539 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Science of the Total Environment&rft.volume=612&rft.spage=129&rft.date=2018 Science of the Total Environment 612 129 137 http://dx.doi.org/10.1016/j.scitotenv.2017.08.217 URN:NBN:no-64336 Fulltext https://www.duo.uio.no/bitstream/handle/10852/61732/2/THN%2Bet%2Bal-Low%2Bconcentrations%2Bof%2Bpersistent%2Borganic%2Bpollutants%2B%2528POPs%2529%2Bin%2Bair%2Bat%2BCape%2BVerde.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.scitotenv.2017.08.217 |
container_title |
Science of The Total Environment |
container_volume |
612 |
container_start_page |
129 |
op_container_end_page |
137 |
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1766341603649126400 |