Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean
Concentrations of polychlorinated biphenyls (PCBs), organochlorine pesticides (OC pesticides), and polybrominated diphenyl ethers (PBDEs) are reported in surficial sediments sampled along cruise transects from the Bering Sea to the central Arctic Ocean. OCs and PCBs all had significantly higher conc...
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ftulancaster:oai:eprints.lancs.ac.uk:73569 2024-04-28T08:04:26+00:00 Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean Ma, Yuxin Halsall, Crispin Crosse, John Graf, Carola Cai, Minghong He, Jianfeng Gao, Guoping Jones, Kevin 2015-04 application/pdf https://eprints.lancs.ac.uk/id/eprint/73569/ https://eprints.lancs.ac.uk/id/eprint/73569/1/Ma_et_al_2015_Journal_of_Geophysical_Research_Oceans.pdf en eng https://eprints.lancs.ac.uk/id/eprint/73569/1/Ma_et_al_2015_Journal_of_Geophysical_Research_Oceans.pdf Ma, Yuxin and Halsall, Crispin and Crosse, John and Graf, Carola and Cai, Minghong and He, Jianfeng and Gao, Guoping and Jones, Kevin (2015) Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean. Journal of Geophysical Research: Oceans, 120 (4). pp. 2723-2735. ISSN 8755-8556 creative_commons_attribution_noncommercial_4_0_international_license Journal Article PeerReviewed 2015 ftulancaster 2024-04-03T14:02:32Z Concentrations of polychlorinated biphenyls (PCBs), organochlorine pesticides (OC pesticides), and polybrominated diphenyl ethers (PBDEs) are reported in surficial sediments sampled along cruise transects from the Bering Sea to the central Arctic Ocean. OCs and PCBs all had significantly higher concentrations in the relatively shallow water (<500 m depth) of the Bering-Chukchi shelf areas (e.g., ΣPCB 286 ± 265 pg g−1 dw) compared to the deeper water regions (>500 m) of the Bering Sea and Arctic Ocean (e.g., Canada Basin ΣPCB 149 ± 102 pg g−1 dw). Concentrations were similar to, or slightly lower than, studies from the 1990s, indicating a lack of a declining trend. PBDEs (excluding BDE-209) displayed very low concentrations (e.g., range of median values, 3.5–6.6 pg/g dw). In the shelf areas, the sediments comprised similar proportions of silt and clay, whereas the deep basin sediments were dominated by clay, with a lower total organic carbon (TOC) content. While significant positive correlations were observed between persistent organic pollutant (POP) concentrations and TOC (Pearson correlation, r = 0.66–0.75, p <0.05), the lack of strong correlations, combined with differing chemical profiles between the sediments and technical formulations (and/or marine surface waters), indicate substantial chemical processing during transfer to the benthic environment. Marked differences in sedimentation rates between the shallow and deeper water regions are apparent (the ∼5 cm-depth grab samples collected here representing ∼100 years of accumulation for the shelf sediments and ∼1000 years for the deeper ocean regions), which may bias any comparisons. Nonetheless, the sediments of the shallower coastal arctic seas appear to serve as significant repositories for POPs deposited from surface waters. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Bering Sea canada basin Central Arctic Chukchi Lancaster University: Lancaster Eprints Journal of Geophysical Research: Oceans 120 4 2723 2735 |
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Open Polar |
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Lancaster University: Lancaster Eprints |
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ftulancaster |
language |
English |
description |
Concentrations of polychlorinated biphenyls (PCBs), organochlorine pesticides (OC pesticides), and polybrominated diphenyl ethers (PBDEs) are reported in surficial sediments sampled along cruise transects from the Bering Sea to the central Arctic Ocean. OCs and PCBs all had significantly higher concentrations in the relatively shallow water (<500 m depth) of the Bering-Chukchi shelf areas (e.g., ΣPCB 286 ± 265 pg g−1 dw) compared to the deeper water regions (>500 m) of the Bering Sea and Arctic Ocean (e.g., Canada Basin ΣPCB 149 ± 102 pg g−1 dw). Concentrations were similar to, or slightly lower than, studies from the 1990s, indicating a lack of a declining trend. PBDEs (excluding BDE-209) displayed very low concentrations (e.g., range of median values, 3.5–6.6 pg/g dw). In the shelf areas, the sediments comprised similar proportions of silt and clay, whereas the deep basin sediments were dominated by clay, with a lower total organic carbon (TOC) content. While significant positive correlations were observed between persistent organic pollutant (POP) concentrations and TOC (Pearson correlation, r = 0.66–0.75, p <0.05), the lack of strong correlations, combined with differing chemical profiles between the sediments and technical formulations (and/or marine surface waters), indicate substantial chemical processing during transfer to the benthic environment. Marked differences in sedimentation rates between the shallow and deeper water regions are apparent (the ∼5 cm-depth grab samples collected here representing ∼100 years of accumulation for the shelf sediments and ∼1000 years for the deeper ocean regions), which may bias any comparisons. Nonetheless, the sediments of the shallower coastal arctic seas appear to serve as significant repositories for POPs deposited from surface waters. |
format |
Article in Journal/Newspaper |
author |
Ma, Yuxin Halsall, Crispin Crosse, John Graf, Carola Cai, Minghong He, Jianfeng Gao, Guoping Jones, Kevin |
spellingShingle |
Ma, Yuxin Halsall, Crispin Crosse, John Graf, Carola Cai, Minghong He, Jianfeng Gao, Guoping Jones, Kevin Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean |
author_facet |
Ma, Yuxin Halsall, Crispin Crosse, John Graf, Carola Cai, Minghong He, Jianfeng Gao, Guoping Jones, Kevin |
author_sort |
Ma, Yuxin |
title |
Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean |
title_short |
Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean |
title_full |
Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean |
title_fullStr |
Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean |
title_full_unstemmed |
Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean |
title_sort |
persistent organic pollutants in ocean sediments from the north pacific to the arctic ocean |
publishDate |
2015 |
url |
https://eprints.lancs.ac.uk/id/eprint/73569/ https://eprints.lancs.ac.uk/id/eprint/73569/1/Ma_et_al_2015_Journal_of_Geophysical_Research_Oceans.pdf |
genre |
Arctic Arctic Arctic Ocean Bering Sea canada basin Central Arctic Chukchi |
genre_facet |
Arctic Arctic Arctic Ocean Bering Sea canada basin Central Arctic Chukchi |
op_relation |
https://eprints.lancs.ac.uk/id/eprint/73569/1/Ma_et_al_2015_Journal_of_Geophysical_Research_Oceans.pdf Ma, Yuxin and Halsall, Crispin and Crosse, John and Graf, Carola and Cai, Minghong and He, Jianfeng and Gao, Guoping and Jones, Kevin (2015) Persistent organic pollutants in ocean sediments from the North Pacific to the Arctic Ocean. Journal of Geophysical Research: Oceans, 120 (4). pp. 2723-2735. ISSN 8755-8556 |
op_rights |
creative_commons_attribution_noncommercial_4_0_international_license |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
120 |
container_issue |
4 |
container_start_page |
2723 |
op_container_end_page |
2735 |
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1797575101575593984 |