Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay)
The lithium/magnesium (Li/Mg) molar ratios, radiocarbon measurements (?14C) and Nd-isotopic composition (eNd) of the aragonite skeleton of a branching cold-water coral (CWC) species Madrepora oculata collected alive in the Bay of Biscay at ~691 m water depth were investigated to reconstruct a robust...
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ftopenaccessrep:oai:zenodo.org:22654 2023-05-15T17:31:20+02:00 Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) Montero-Serrano, Jean-Carlos Frank, Norbert Tisnerat-Laborde, Nadine Colin, Christophe Wu, Chung-Che Lin, Ke Shen, Chuan-Chou Copard, Kevin Orejas, Covadonga Gori, Andrea De Mol, Lies Van Rooij, David Reverdin, Gilles Douville, Eric 2013-01-01 https://www.openaccessrepository.it/record/22654 https://doi.org/10.1016/j.epsl.2013.01.012 eng eng https://www.openaccessrepository.it/record/22654 doi:10.1016/j.epsl.2013.01.012 info:eu-repo/semantics/openAccess FP7 Environment (including Climate Change) European Commission EC SP1-Cooperation info:eu-repo/semantics/article publication-article 2013 ftopenaccessrep https://doi.org/10.1016/j.epsl.2013.01.012 2022-11-23T06:42:11Z The lithium/magnesium (Li/Mg) molar ratios, radiocarbon measurements (?14C) and Nd-isotopic composition (eNd) of the aragonite skeleton of a branching cold-water coral (CWC) species Madrepora oculata collected alive in the Bay of Biscay at ~691 m 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. ?14C measurements shows quasi-decadal oscillations of 15‰ around pre-bomb ?14C average value of -59±6‰ and post-bomb ?14C of -12±6‰, which most likely reflect decadal changes of water mass exchange across the thermocline. The coral eNd 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. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository Earth and Planetary Science Letters 364 134 144 |
institution |
Open Polar |
collection |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
op_collection_id |
ftopenaccessrep |
language |
English |
topic |
FP7 Environment (including Climate Change) European Commission EC SP1-Cooperation |
spellingShingle |
FP7 Environment (including Climate Change) European Commission EC SP1-Cooperation Montero-Serrano, Jean-Carlos Frank, Norbert Tisnerat-Laborde, Nadine Colin, Christophe Wu, Chung-Che Lin, Ke Shen, Chuan-Chou Copard, Kevin Orejas, Covadonga Gori, Andrea De Mol, Lies Van Rooij, David Reverdin, Gilles Douville, Eric Decadal changes in the mid-depth water mass dynamic of the Northeastern Atlantic margin (Bay of Biscay) |
topic_facet |
FP7 Environment (including Climate Change) European Commission EC SP1-Cooperation |
description |
The lithium/magnesium (Li/Mg) molar ratios, radiocarbon measurements (?14C) and Nd-isotopic composition (eNd) of the aragonite skeleton of a branching cold-water coral (CWC) species Madrepora oculata collected alive in the Bay of Biscay at ~691 m 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. ?14C measurements shows quasi-decadal oscillations of 15‰ around pre-bomb ?14C average value of -59±6‰ and post-bomb ?14C of -12±6‰, which most likely reflect decadal changes of water mass exchange across the thermocline. The coral eNd 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. |
format |
Article in Journal/Newspaper |
author |
Montero-Serrano, Jean-Carlos Frank, Norbert Tisnerat-Laborde, Nadine Colin, Christophe Wu, Chung-Che Lin, Ke Shen, Chuan-Chou Copard, Kevin Orejas, Covadonga Gori, Andrea De Mol, Lies Van Rooij, David Reverdin, Gilles Douville, Eric |
author_facet |
Montero-Serrano, Jean-Carlos Frank, Norbert Tisnerat-Laborde, Nadine Colin, Christophe Wu, Chung-Che Lin, Ke Shen, Chuan-Chou Copard, Kevin Orejas, Covadonga Gori, Andrea De Mol, Lies Van Rooij, David Reverdin, Gilles Douville, Eric |
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) |
publishDate |
2013 |
url |
https://www.openaccessrepository.it/record/22654 https://doi.org/10.1016/j.epsl.2013.01.012 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://www.openaccessrepository.it/record/22654 doi:10.1016/j.epsl.2013.01.012 |
op_rights |
info:eu-repo/semantics/openAccess |
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_ |
1766128852721991680 |