Dynamics of particle export on the Northwest Atlantic margin
The Northwest Atlantic margin is characterized by high biological productivity in shelf and slope surface waters. In addition to carbon supply to underlying sediments, the persistent, intermediate depth nepheloid layers emanating from the continental shelves, and bottom nepheloid layers maintained b...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Online Access: | https://oasis.postech.ac.kr/handle/2014.oak/25935 https://doi.org/10.1016/J.DSR.2009.05.007 |
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ftponangunivst:oai:oasis.postech.ac.kr:2014.oak/25935 2023-05-15T17:45:32+02:00 Dynamics of particle export on the Northwest Atlantic margin Hwang, J Manganini, SJ Montlucon, DB Eglinton, TI 해양대학원 10160028 Hwang, J 2009-10 https://oasis.postech.ac.kr/handle/2014.oak/25935 https://doi.org/10.1016/J.DSR.2009.05.007 English eng PERGAMON-ELSEVIER SCIENCE LTD DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 56 10 1792 1803 SCI급, SCOPUS 등재논문 SCI Oceanography 0967-0637 2010-OAK-0000021273 https://oasis.postech.ac.kr/handle/2014.oak/25935 doi:10.1016/J.DSR.2009.05.007 10175 DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, v.56, no.10, pp.1792 - 1803 000269469800013 2-s2.0-67949098939 Sinking POC Sediment resuspension Carbon cycle Radiocarbon Fatty acid Northwest Atlantic PARTICULATE ORGANIC-CARBON DEEP-SEA STORMS NORTHEAST PACIFIC CONTINENTAL-SHELF LATERAL PARTICLE UPPER SLOPE TEMPORAL VARIABILITY SEDIMENT TRANSPORT ARGENTINE BASIN NEPHELOID LAYER Article ART 2009 ftponangunivst https://doi.org/10.1016/J.DSR.2009.05.007 2022-10-20T20:16:53Z The Northwest Atlantic margin is characterized by high biological productivity in shelf and slope surface waters. In addition to carbon supply to underlying sediments, the persistent, intermediate depth nepheloid layers emanating from the continental shelves, and bottom nepheloid layers maintained by strong bottom currents associated with the southward flowing Deep Western Boundary Current (DWBC), provide conduits for export of organic carbon over the margin and/or to the interior ocean. As a part of a project to understand dynamics of particulate organic carbon (POC) cycling in this region, we examined the bulk and molecular properties of time-series sediment trap samples obtained at 968 m, 1976 m, and 2938 m depths from a bottom-tethered mooring on the New England slope (water depth, 2988 m). Frequent occurrences of higher fluxes in deep relative to shallower sediment traps and low Delta(14)C values of sinking POC together provide strong evidence for significant lateral transport of aged organic matter over the margin. Comparison of biogeochemical properties such as aluminum concentration and flux, and iron concentration between samples intercepted at different depths shows that particles collected by the deepest trap had more complex sources than the shallower ones. These data also suggest that at least two modes of lateral transport exist over the New England margin. Based on radiocarbon mass balance, about 30% (+/- 10%) of sinking POC in all sediment traps is estimated to be derived from lateral transport of resuspended sediment. A strong correlation between Delta(14)C values and aluminum concentrations suggests that the aged organic matter is associated with lithogenic particles. Our results suggest that lateral transport of organic matter, particularly that resulting from sediment resuspension, should be considered in addition to vertical supply of organic matter derived from primary production, in order to understand carbon cycling and export over continental margins. (C) 2009 Elsevier Ltd. All rights ... Article in Journal/Newspaper Northwest Atlantic Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS) Argentine Pacific Deep Sea Research Part I: Oceanographic Research Papers 56 10 1792 1803 |
institution |
Open Polar |
collection |
Pohang University of Science and Technology (POSTECH): Open Access System for Information Sharing (OASIS) |
op_collection_id |
ftponangunivst |
language |
English |
topic |
Sinking POC Sediment resuspension Carbon cycle Radiocarbon Fatty acid Northwest Atlantic PARTICULATE ORGANIC-CARBON DEEP-SEA STORMS NORTHEAST PACIFIC CONTINENTAL-SHELF LATERAL PARTICLE UPPER SLOPE TEMPORAL VARIABILITY SEDIMENT TRANSPORT ARGENTINE BASIN NEPHELOID LAYER |
spellingShingle |
Sinking POC Sediment resuspension Carbon cycle Radiocarbon Fatty acid Northwest Atlantic PARTICULATE ORGANIC-CARBON DEEP-SEA STORMS NORTHEAST PACIFIC CONTINENTAL-SHELF LATERAL PARTICLE UPPER SLOPE TEMPORAL VARIABILITY SEDIMENT TRANSPORT ARGENTINE BASIN NEPHELOID LAYER Hwang, J Manganini, SJ Montlucon, DB Eglinton, TI Dynamics of particle export on the Northwest Atlantic margin |
topic_facet |
Sinking POC Sediment resuspension Carbon cycle Radiocarbon Fatty acid Northwest Atlantic PARTICULATE ORGANIC-CARBON DEEP-SEA STORMS NORTHEAST PACIFIC CONTINENTAL-SHELF LATERAL PARTICLE UPPER SLOPE TEMPORAL VARIABILITY SEDIMENT TRANSPORT ARGENTINE BASIN NEPHELOID LAYER |
description |
The Northwest Atlantic margin is characterized by high biological productivity in shelf and slope surface waters. In addition to carbon supply to underlying sediments, the persistent, intermediate depth nepheloid layers emanating from the continental shelves, and bottom nepheloid layers maintained by strong bottom currents associated with the southward flowing Deep Western Boundary Current (DWBC), provide conduits for export of organic carbon over the margin and/or to the interior ocean. As a part of a project to understand dynamics of particulate organic carbon (POC) cycling in this region, we examined the bulk and molecular properties of time-series sediment trap samples obtained at 968 m, 1976 m, and 2938 m depths from a bottom-tethered mooring on the New England slope (water depth, 2988 m). Frequent occurrences of higher fluxes in deep relative to shallower sediment traps and low Delta(14)C values of sinking POC together provide strong evidence for significant lateral transport of aged organic matter over the margin. Comparison of biogeochemical properties such as aluminum concentration and flux, and iron concentration between samples intercepted at different depths shows that particles collected by the deepest trap had more complex sources than the shallower ones. These data also suggest that at least two modes of lateral transport exist over the New England margin. Based on radiocarbon mass balance, about 30% (+/- 10%) of sinking POC in all sediment traps is estimated to be derived from lateral transport of resuspended sediment. A strong correlation between Delta(14)C values and aluminum concentrations suggests that the aged organic matter is associated with lithogenic particles. Our results suggest that lateral transport of organic matter, particularly that resulting from sediment resuspension, should be considered in addition to vertical supply of organic matter derived from primary production, in order to understand carbon cycling and export over continental margins. (C) 2009 Elsevier Ltd. All rights ... |
author2 |
해양대학원 10160028 Hwang, J |
format |
Article in Journal/Newspaper |
author |
Hwang, J Manganini, SJ Montlucon, DB Eglinton, TI |
author_facet |
Hwang, J Manganini, SJ Montlucon, DB Eglinton, TI |
author_sort |
Hwang, J |
title |
Dynamics of particle export on the Northwest Atlantic margin |
title_short |
Dynamics of particle export on the Northwest Atlantic margin |
title_full |
Dynamics of particle export on the Northwest Atlantic margin |
title_fullStr |
Dynamics of particle export on the Northwest Atlantic margin |
title_full_unstemmed |
Dynamics of particle export on the Northwest Atlantic margin |
title_sort |
dynamics of particle export on the northwest atlantic margin |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2009 |
url |
https://oasis.postech.ac.kr/handle/2014.oak/25935 https://doi.org/10.1016/J.DSR.2009.05.007 |
geographic |
Argentine Pacific |
geographic_facet |
Argentine Pacific |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_relation |
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 56 10 1792 1803 SCI급, SCOPUS 등재논문 SCI Oceanography 0967-0637 2010-OAK-0000021273 https://oasis.postech.ac.kr/handle/2014.oak/25935 doi:10.1016/J.DSR.2009.05.007 10175 DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, v.56, no.10, pp.1792 - 1803 000269469800013 2-s2.0-67949098939 |
op_doi |
https://doi.org/10.1016/J.DSR.2009.05.007 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
56 |
container_issue |
10 |
container_start_page |
1792 |
op_container_end_page |
1803 |
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1766148616794144768 |