Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay)
Montero-Serrano, Jean-Carlos .et al.-- 11 pages, 7 figues, 1 table, 1 appendix The lithium/magnesium (Li/Mg) molar ratios, radiocarbon measurements (δ14C) and Nd-isotopic composition (εNd) of the aragonite skeleton of a branching cold-water coral (CWC) species Madrepora oculata collected alive in th...
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ftcsic:oai:digital.csic.es:10261/89078 2024-02-11T10:06:23+01:00 Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) Montero-Serrano, Jean-Carlos Gori, Andrea 2013-02 http://hdl.handle.net/10261/89078 https://doi.org/10.1016/j.epsl.2013.01.012 en eng Elsevier #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/226354 https://doi.org/10.1016/j.epsl.2013.01.012 doi:10.1016/j.epsl.2013.01.012 issn: 0012-821X Earth and Planetary Science Letters 364: 134-144 (2013) http://hdl.handle.net/10261/89078 none Northeast Atlantic margin Cold-water corals Neodymium isotopes Trace elements Radiocarbon Bay of Biscay artículo http://purl.org/coar/resource_type/c_6501 2013 ftcsic https://doi.org/10.1016/j.epsl.2013.01.012 2024-01-16T09:55:13Z Montero-Serrano, Jean-Carlos .et al.-- 11 pages, 7 figues, 1 table, 1 appendix The lithium/magnesium (Li/Mg) molar ratios, radiocarbon measurements (δ14C) and Nd-isotopic composition (εNd) of the aragonite skeleton of a branching cold-water coral (CWC) species Madrepora oculata collected alive in the Bay of Biscay at ~691m water depth were investigated to reconstruct a robust record of the mid-depth water mass dynamics between 1950 and 1990 AD. Temperature estimates based on the skeletons Li/Mg molar ratios reveal small decadal changes of about 1°C at thermocline depth synchronous to and of similar amplitude as surface temperature anomalies δ14C measurements shows quasi-decadal oscillations of 15%; around pre-bomb δ14C average value of -59±6%; and post-bomb δ14C of -12±6%;, which most likely reflect decadal changes of water mass exchange across the thermocline. The coral εNd values remain in narrow ranges of -11.9 to -10.2, similar to the isotopic composition of East North Atlantic Central Water, but show highest values in the late 1950s, and early 1960s, 1970s, and 1980s. The punctuated changes of the coral Nd-isotopic composition may thus reflect periods of particular enhanced advection of temperate intermediate water (mid-depth Subpolar Gyre/Mediterranean Sea Water). Altogether, our robust multi-proxy record provides new evidence that Northern Hemisphere atmospheric variability (such as, North Atlantic Oscillation and East Atlantic pattern) drives changes not only in the thermocline but also in the mid-depth water-mass advection patterns in the Northeastern Atlantic margin. However, the interannual variability of our record remains to be tested. © 2013 Elsevier B.V. This work was funded through the French Agence National de Recherche projet (NEWTON: ANR-BLANC06-1-139504), the French Centre National de la Recherche Scientifique (CNRS) and the Commisariat à l'Energie Atomique et aux Energies Alternatives (CEA). We also acknowledge Louise Bordier for her support with the ICP-MS analyses. Finally we ... Article in Journal/Newspaper North Atlantic North Atlantic oscillation Northeast Atlantic Digital.CSIC (Spanish National Research Council) Montero ENVELOPE(-60.517,-60.517,-66.017,-66.017) Earth and Planetary Science Letters 364 134 144 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Northeast Atlantic margin Cold-water corals Neodymium isotopes Trace elements Radiocarbon Bay of Biscay |
spellingShingle |
Northeast Atlantic margin Cold-water corals Neodymium isotopes Trace elements Radiocarbon Bay of Biscay Montero-Serrano, Jean-Carlos Gori, Andrea Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) |
topic_facet |
Northeast Atlantic margin Cold-water corals Neodymium isotopes Trace elements Radiocarbon Bay of Biscay |
description |
Montero-Serrano, Jean-Carlos .et al.-- 11 pages, 7 figues, 1 table, 1 appendix The lithium/magnesium (Li/Mg) molar ratios, radiocarbon measurements (δ14C) and Nd-isotopic composition (εNd) of the aragonite skeleton of a branching cold-water coral (CWC) species Madrepora oculata collected alive in the Bay of Biscay at ~691m water depth were investigated to reconstruct a robust record of the mid-depth water mass dynamics between 1950 and 1990 AD. Temperature estimates based on the skeletons Li/Mg molar ratios reveal small decadal changes of about 1°C at thermocline depth synchronous to and of similar amplitude as surface temperature anomalies δ14C measurements shows quasi-decadal oscillations of 15%; around pre-bomb δ14C average value of -59±6%; and post-bomb δ14C of -12±6%;, which most likely reflect decadal changes of water mass exchange across the thermocline. The coral εNd values remain in narrow ranges of -11.9 to -10.2, similar to the isotopic composition of East North Atlantic Central Water, but show highest values in the late 1950s, and early 1960s, 1970s, and 1980s. The punctuated changes of the coral Nd-isotopic composition may thus reflect periods of particular enhanced advection of temperate intermediate water (mid-depth Subpolar Gyre/Mediterranean Sea Water). Altogether, our robust multi-proxy record provides new evidence that Northern Hemisphere atmospheric variability (such as, North Atlantic Oscillation and East Atlantic pattern) drives changes not only in the thermocline but also in the mid-depth water-mass advection patterns in the Northeastern Atlantic margin. However, the interannual variability of our record remains to be tested. © 2013 Elsevier B.V. This work was funded through the French Agence National de Recherche projet (NEWTON: ANR-BLANC06-1-139504), the French Centre National de la Recherche Scientifique (CNRS) and the Commisariat à l'Energie Atomique et aux Energies Alternatives (CEA). We also acknowledge Louise Bordier for her support with the ICP-MS analyses. Finally we ... |
format |
Article in Journal/Newspaper |
author |
Montero-Serrano, Jean-Carlos Gori, Andrea |
author_facet |
Montero-Serrano, Jean-Carlos Gori, Andrea |
author_sort |
Montero-Serrano, Jean-Carlos |
title |
Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) |
title_short |
Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) |
title_full |
Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) |
title_fullStr |
Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) |
title_full_unstemmed |
Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) |
title_sort |
decadal changes in the mid-depth water mass dynamic of the northeastern atlantic margin (bay of biscay) |
publisher |
Elsevier |
publishDate |
2013 |
url |
http://hdl.handle.net/10261/89078 https://doi.org/10.1016/j.epsl.2013.01.012 |
long_lat |
ENVELOPE(-60.517,-60.517,-66.017,-66.017) |
geographic |
Montero |
geographic_facet |
Montero |
genre |
North Atlantic North Atlantic oscillation Northeast Atlantic |
genre_facet |
North Atlantic North Atlantic oscillation Northeast Atlantic |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7/226354 https://doi.org/10.1016/j.epsl.2013.01.012 doi:10.1016/j.epsl.2013.01.012 issn: 0012-821X Earth and Planetary Science Letters 364: 134-144 (2013) http://hdl.handle.net/10261/89078 |
op_rights |
none |
op_doi |
https://doi.org/10.1016/j.epsl.2013.01.012 |
container_title |
Earth and Planetary Science Letters |
container_volume |
364 |
container_start_page |
134 |
op_container_end_page |
144 |
_version_ |
1790604075104993280 |