Downward particle fluxes and sediment accumulation rates in the western Bransfield Strait: Implications of lateral transport for carbon cycle studies in Antarctic marginal seas

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

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Main Authors: Palanques, Albert, Isla, Enrique, Masqué, Pere, Puig, Pere, Sanchez-Cabeza, Joan-Albert, Gili, Josep Maria, Guillén, Jorge
Format: artículo biblioteca
Published: Sears Foundation for Marine Research 2002
Online Access:http://hdl.handle.net/10261/243703
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spelling dig-icm-es-10261-2437032021-06-16T09:54:40Z 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 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 2021-06-16T09:50:03Z 2021-06-16T09:50:03Z 2002 2021-06-16T09:50:03Z artículo http://purl.org/coar/resource_type/c_6501 issn: 0022-2402 Journal of Marine Research 60(2): 347-365 (2002) http://hdl.handle.net/10261/243703 10.1357/00222400260497525 https://doi.org/10.1357/00222400260497525 Sí none Sears Foundation for Marine Research
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
description 19 pages, 9 figures
format artículo
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
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