Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas
19 pages, 9 figures Downward particle and carbon fluxes were studied along with sediment and carbon accumulation fluxes in the western Bransfield Strait. Particle fluxes at 1000 m depth indicate that most of the carbon accumulated in the seabed at the study site is transported laterally. Biogenic co...
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2002
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Online Access: | http://hdl.handle.net/10261/243703 https://doi.org/10.1357/00222400260497525 |
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ftcsic:oai:digital.csic.es:10261/243703 2024-02-11T09:56:12+01:00 Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas Palanques, Albert Isla, Enrique Masqué, Pere Puig, Pere Sanchez-Cabeza, Joan-Albert Gili, Josep Maria Guillén, Jorge 2002 http://hdl.handle.net/10261/243703 https://doi.org/10.1357/00222400260497525 unknown Sears Foundation for Marine Research https://doi.org/10.1357/00222400260497525 Sí issn: 0022-2402 Journal of Marine Research 60(2): 347-365 (2002) http://hdl.handle.net/10261/243703 doi:10.1357/00222400260497525 none artículo http://purl.org/coar/resource_type/c_6501 2002 ftcsic https://doi.org/10.1357/00222400260497525 2024-01-16T11:10:02Z 19 pages, 9 figures Downward particle and carbon fluxes were studied along with sediment and carbon accumulation fluxes in the western Bransfield Strait. Particle fluxes at 1000 m depth indicate that most of the carbon accumulated in the seabed at the study site is transported laterally. Biogenic components of the near-bottom particle fluxes included well-preserved organic matter with benthic diatoms, amphipoda and polychaetes that were resuspended and/or winnowed in shallow environments and transported basinward. High near-bottom particle and carbon fluxes were in agreement with high sediment and carbon accumulation fluxes. About 12% of the near-bottom OC downward flux is buried below the SML in the deeper part of the basin. Carbon recycling in the sediment column is lower near the mouth of the Orleans Canyon (about 10%) than at the deeper part of the basin (about 50%). The carbon preserved in the sediment near the mouth of the canyon and at the deeper part of the basin represents about 9% and 3%, respectively, of the carbon produced in the euphotic layer of the study area. However, because most of the organic carbon (OC) is transported laterally, the higher primary productivity from nearby shallower areas should be considered and the percentage of the OC preserved in the sediment would account only for 4.5% and 1.5% at each of the study sites. The results show that resuspension in shallow environments, lateral transport and near-bottom downward fluxes must be considered in addition to surface primary production, midwater downward fluxes and accumulation rates in order to better understand the carbon dynamics in Antarctic marginal seas. The accumulation rates at many sites of these seas appear to be more sensitive to variability in current-driven sediment redistribution than to changes in productivity, which must be taken into account when interpreting the paleoceanographic record Article in Journal/Newspaper Antarc* Antarctic Bransfield Strait Digital.CSIC (Spanish National Research Council) Antarctic Bransfield Strait Orleans ENVELOPE(-60.667,-60.667,-63.950,-63.950) Journal of Marine Research 60 2 347 365 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
unknown |
description |
19 pages, 9 figures Downward particle and carbon fluxes were studied along with sediment and carbon accumulation fluxes in the western Bransfield Strait. Particle fluxes at 1000 m depth indicate that most of the carbon accumulated in the seabed at the study site is transported laterally. Biogenic components of the near-bottom particle fluxes included well-preserved organic matter with benthic diatoms, amphipoda and polychaetes that were resuspended and/or winnowed in shallow environments and transported basinward. High near-bottom particle and carbon fluxes were in agreement with high sediment and carbon accumulation fluxes. About 12% of the near-bottom OC downward flux is buried below the SML in the deeper part of the basin. Carbon recycling in the sediment column is lower near the mouth of the Orleans Canyon (about 10%) than at the deeper part of the basin (about 50%). The carbon preserved in the sediment near the mouth of the canyon and at the deeper part of the basin represents about 9% and 3%, respectively, of the carbon produced in the euphotic layer of the study area. However, because most of the organic carbon (OC) is transported laterally, the higher primary productivity from nearby shallower areas should be considered and the percentage of the OC preserved in the sediment would account only for 4.5% and 1.5% at each of the study sites. The results show that resuspension in shallow environments, lateral transport and near-bottom downward fluxes must be considered in addition to surface primary production, midwater downward fluxes and accumulation rates in order to better understand the carbon dynamics in Antarctic marginal seas. The accumulation rates at many sites of these seas appear to be more sensitive to variability in current-driven sediment redistribution than to changes in productivity, which must be taken into account when interpreting the paleoceanographic record |
format |
Article in Journal/Newspaper |
author |
Palanques, Albert Isla, Enrique Masqué, Pere Puig, Pere Sanchez-Cabeza, Joan-Albert Gili, Josep Maria Guillén, Jorge |
spellingShingle |
Palanques, Albert Isla, Enrique Masqué, Pere Puig, Pere Sanchez-Cabeza, Joan-Albert Gili, Josep Maria Guillén, Jorge Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas |
author_facet |
Palanques, Albert Isla, Enrique Masqué, Pere Puig, Pere Sanchez-Cabeza, Joan-Albert Gili, Josep Maria Guillén, Jorge |
author_sort |
Palanques, Albert |
title |
Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas |
title_short |
Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas |
title_full |
Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas |
title_fullStr |
Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas |
title_full_unstemmed |
Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas |
title_sort |
downward particle fluxes and sediment accumulation rates in the western bransfield strait: implications of lateral transport for carbon cycle studies in antarctic marginal seas |
publisher |
Sears Foundation for Marine Research |
publishDate |
2002 |
url |
http://hdl.handle.net/10261/243703 https://doi.org/10.1357/00222400260497525 |
long_lat |
ENVELOPE(-60.667,-60.667,-63.950,-63.950) |
geographic |
Antarctic Bransfield Strait Orleans |
geographic_facet |
Antarctic Bransfield Strait Orleans |
genre |
Antarc* Antarctic Bransfield Strait |
genre_facet |
Antarc* Antarctic Bransfield Strait |
op_relation |
https://doi.org/10.1357/00222400260497525 Sí issn: 0022-2402 Journal of Marine Research 60(2): 347-365 (2002) http://hdl.handle.net/10261/243703 doi:10.1357/00222400260497525 |
op_rights |
none |
op_doi |
https://doi.org/10.1357/00222400260497525 |
container_title |
Journal of Marine Research |
container_volume |
60 |
container_issue |
2 |
container_start_page |
347 |
op_container_end_page |
365 |
_version_ |
1790601320855502848 |