Seasonal Variation of Polychlorinated Biphenyl congeners in Surficial Sediment, Trapped Settling Material and Suspended Particulate Material in Lake Michigan, USA

Robinson, Sander D.; Landrum, Peter F.; Hoof, Patricia Van; Eadie, Brian J.

doi:10.1897/07-006

Cited by 2 publications

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“…This timing of the maximum shortly after the ban of PCBs in 1977 is consistent with the one documented for core NLM-B by Hermanson et al (1991).The pattern of PCB congeners in the threefactor solution (Figs. S3 and S4) is in general accordance with the pattern in surficial sediments, determined by Robinson et al (2008).…”

Section: Lake Michigansupporting

confidence: 88%

PCBs in Great Lakes sediments, determined by positive matrix factorization

Soonthornnonda

Zou

Christensen

et al. 2011

Journal of Great Lakes Research

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Section: Lake Michigansupporting

confidence: 88%

PCBs in Great Lakes sediments, determined by positive matrix factorization

Soonthornnonda

Zou

Christensen

et al. 2011

Journal of Great Lakes Research

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“…The present study is aimed to analyze the spatial and temporal variability of OCs deposition in order to assess the role of DSWC and the submarine canyons in the transport of these compounds to the deep sea. Data are also compared with results from previous sediment trap studies that have generally been performed in coastal areas, bays, or lakes. ,− …”

Section: Introductionmentioning

confidence: 99%

Role of Dense Shelf Water Cascading in the Transfer of Organochlorine Compounds to Open Marine Waters

Salvadó

Grimalt

López

et al. 2012

Environ. Sci. Technol.

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Settling particles were collected by an array of sediment trap moorings deployed along the Cap de Creus (CCC) and Lacaze-Duthiers (LDC) submarine canyons and on the adjacent southern open slope (SOS) between October 2005 and October 2006. This array collected particles during common settling processes and particles transferred to deep waters by dense shelf water cascading (DSWC). Polychlorobiphenyls (PCBs), dichlorodiphenyltrichloroethane and its metabolites (DDTs), chlorobenzenes (CBzs)--pentachlorobenzene and hexachlorobenzene--and hexachlorocyclohexanes were analyzed in all samples. The results show much higher settling fluxes of these compounds during DSWC than during common sedimentation processes. The area of highest deposition was located between 1000 and 1500 m depth and extended along the canyons and outside them showing their channelling effects but also overflows of dense shelf water from these canyons. Higher fluxes were observed near the bottom (30 m above bottom; mab) than at intermediate waters (500 mab) which is consistent with the formation and sinking of dense water close to the continental shelf and main displacement through the slope by the bottom. DSWC involved the highest settling fluxes of these compounds ever described in marine continental slopes and pelagic areas, e.g., peak values of PCBs (960 ng · m(-2) · d(-1)), DDTs (2900 ng · m(-2) · d(-1)), CBzs (340 ng · m(-2) · d(-1)) and lindane (180 ng · m(-2) · d(-1)).

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Seasonal Variation of Polychlorinated Biphenyl congeners in Surficial Sediment, Trapped Settling Material and Suspended Particulate Material in Lake Michigan, USA

Cited by 2 publications

References 0 publications

PCBs in Great Lakes sediments, determined by positive matrix factorization

PCBs in Great Lakes sediments, determined by positive matrix factorization

Role of Dense Shelf Water Cascading in the Transfer of Organochlorine Compounds to Open Marine Waters

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