Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years.
The sediments of the Galician Interior Basin are influenced by the Atlantic Meridional Overturning Circulation (AMOC) and by their proximity to the Western Iberia continental landmass , and thus provide an adequate archive to study the peculiarities of the last glacial‐interglacial dynamics and the...
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ftdoajarticles:oai:doaj.org/article:e39edebe2aeb4cab825ec1a8941f66f6 2023-05-15T17:32:33+02:00 Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. Maider Plaza Morlote Omar Benazzouz Sara Ribeiro 2014-06-01T00:00:00Z https://doi.org/10.3389/conf.fmars.2014.02.00161 https://doaj.org/article/e39edebe2aeb4cab825ec1a8941f66f6 EN eng Frontiers Media S.A. http://journal.frontiersin.org/Journal/10.3389/conf.fmars.2014.02.00161/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/conf.fmars.2014.02.00161 https://doaj.org/article/e39edebe2aeb4cab825ec1a8941f66f6 Frontiers in Marine Science, Vol 1 (2014) Sediment sources Galician Internal Basin Last glaciation Heinrich Events Sortable Silt Sr Isotope Ratios Nd Isotope Ratios Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2014 ftdoajarticles https://doi.org/10.3389/conf.fmars.2014.02.00161 2022-12-31T14:51:37Z The sediments of the Galician Interior Basin are influenced by the Atlantic Meridional Overturning Circulation (AMOC) and by their proximity to the Western Iberia continental landmass , and thus provide an adequate archive to study the peculiarities of the last glacial‐interglacial dynamics and the transition into present day conditions. The aim of this study has been to analyse the sedimentary expression of climatic processes and forcings derived from the relation between the last North Atlantic glacial cycle and the local regional components -including abrupt climate changes and local events- since the end of the last glacial period in this area. We have attempted to establish the rates and magnitudes of change of this system to understand its climate dynamics, processes and feedbacks, and hence its role on a local to sub‐regional scale from a palaeoclimatic proxies perspective. The inference of these climatic mechanisms encrypted in the deep-sea sedimentary record needs to constrain the spatial and temporal scales of the sedimentary processes involved, in particular the identification of source areas, pathways and transport, storage times and hydrodynamic conditions. In order to achieve these goals we have used a twofold approach; an initial effort to constrain the current sedimentary conditions to their associated local hydrography conditions by means of a mooring, which will be used to later infer the palaeoenvironmental conditions from sediment cores. The location of the mooring and the 5 coring locations has been based on the acquisition of new geophysical data: a precise 20 x 20 m bathymetry covering an area of 9860 km2 and 690 km of high-resolution seismic profiles distributed in 10 transects that allow to investigate the main sedimentary units in the region. The mooring comprised 2 sediment traps located at 500 and 1400 m below the sea surface. These depths are under the influence of the Eastern North Atlantic Central Water (ENACW) and Mediterranean Water (MW). The sediment traps also target sediments ... Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Sediment sources Galician Internal Basin Last glaciation Heinrich Events Sortable Silt Sr Isotope Ratios Nd Isotope Ratios Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Sediment sources Galician Internal Basin Last glaciation Heinrich Events Sortable Silt Sr Isotope Ratios Nd Isotope Ratios Science Q General. Including nature conservation geographical distribution QH1-199.5 Maider Plaza Morlote Omar Benazzouz Sara Ribeiro Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. |
topic_facet |
Sediment sources Galician Internal Basin Last glaciation Heinrich Events Sortable Silt Sr Isotope Ratios Nd Isotope Ratios Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The sediments of the Galician Interior Basin are influenced by the Atlantic Meridional Overturning Circulation (AMOC) and by their proximity to the Western Iberia continental landmass , and thus provide an adequate archive to study the peculiarities of the last glacial‐interglacial dynamics and the transition into present day conditions. The aim of this study has been to analyse the sedimentary expression of climatic processes and forcings derived from the relation between the last North Atlantic glacial cycle and the local regional components -including abrupt climate changes and local events- since the end of the last glacial period in this area. We have attempted to establish the rates and magnitudes of change of this system to understand its climate dynamics, processes and feedbacks, and hence its role on a local to sub‐regional scale from a palaeoclimatic proxies perspective. The inference of these climatic mechanisms encrypted in the deep-sea sedimentary record needs to constrain the spatial and temporal scales of the sedimentary processes involved, in particular the identification of source areas, pathways and transport, storage times and hydrodynamic conditions. In order to achieve these goals we have used a twofold approach; an initial effort to constrain the current sedimentary conditions to their associated local hydrography conditions by means of a mooring, which will be used to later infer the palaeoenvironmental conditions from sediment cores. The location of the mooring and the 5 coring locations has been based on the acquisition of new geophysical data: a precise 20 x 20 m bathymetry covering an area of 9860 km2 and 690 km of high-resolution seismic profiles distributed in 10 transects that allow to investigate the main sedimentary units in the region. The mooring comprised 2 sediment traps located at 500 and 1400 m below the sea surface. These depths are under the influence of the Eastern North Atlantic Central Water (ENACW) and Mediterranean Water (MW). The sediment traps also target sediments ... |
format |
Article in Journal/Newspaper |
author |
Maider Plaza Morlote Omar Benazzouz Sara Ribeiro |
author_facet |
Maider Plaza Morlote Omar Benazzouz Sara Ribeiro |
author_sort |
Maider Plaza Morlote |
title |
Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. |
title_short |
Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. |
title_full |
Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. |
title_fullStr |
Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. |
title_full_unstemmed |
Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. |
title_sort |
sedimentary climatic record in the galician internal basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. |
publisher |
Frontiers Media S.A. |
publishDate |
2014 |
url |
https://doi.org/10.3389/conf.fmars.2014.02.00161 https://doaj.org/article/e39edebe2aeb4cab825ec1a8941f66f6 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Frontiers in Marine Science, Vol 1 (2014) |
op_relation |
http://journal.frontiersin.org/Journal/10.3389/conf.fmars.2014.02.00161/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/conf.fmars.2014.02.00161 https://doaj.org/article/e39edebe2aeb4cab825ec1a8941f66f6 |
op_doi |
https://doi.org/10.3389/conf.fmars.2014.02.00161 |
container_title |
Frontiers in Marine Science |
container_volume |
1 |
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1766130726441320448 |