A new Holocene relative sea-level curve for western Brittany (France): Insights on isostatic dynamics along the Atlantic coasts of north-western Europe
This study presents new Relative Sea Level (RSL) data that were obtained in the Finistère region (Western tip of Brittany, France) and the implications those data have for the understanding of the isostatic dynamics across north-western Europe, and more specifically along the Atlantic and Channel c...
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Online Access: | http://hdl.handle.net/11576/2642389 https://doi.org/10.1016/j.quascirev.2015.10.029 http://www.sciencedirect.com/science/article/pii/S0277379115301505 |
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ftunivurbino:oai:ora.uniurb.it:11576/2642389 2024-04-21T07:50:49+00:00 A new Holocene relative sea-level curve for western Brittany (France): Insights on isostatic dynamics along the Atlantic coasts of north-western Europe Goslin, Jérôme Van Vliet Lanoë, Brigitte Bradley, Sarah Tarasov, Lev Neill, Simon Suanez, Serge SPADA, GIORGIO Goslin, Jérôme Van Vliet Lanoë, Brigitte Spada, Giorgio Bradley, Sarah Tarasov, Lev Neill, Simon Suanez, Serge 2015 STAMPA http://hdl.handle.net/11576/2642389 https://doi.org/10.1016/j.quascirev.2015.10.029 http://www.sciencedirect.com/science/article/pii/S0277379115301505 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000366232300022 volume:129 firstpage:341 lastpage:365 numberofpages:25 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11576/2642389 doi:10.1016/j.quascirev.2015.10.029 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84946408779 http://www.sciencedirect.com/science/article/pii/S0277379115301505 Relative sea-level Holocene Isostasy GIA model Tidal-range modelling Earth structure Brittany info:eu-repo/semantics/article 2015 ftunivurbino https://doi.org/10.1016/j.quascirev.2015.10.029 2024-03-28T01:08:21Z This study presents new Relative Sea Level (RSL) data that were obtained in the Finistère region (Western tip of Brittany, France) and the implications those data have for the understanding of the isostatic dynamics across north-western Europe, and more specifically along the Atlantic and Channel coasts. New stratigraphic sequences were obtained and analyzed to derive 24 new Sea-level Index Points, in which 6 are basal. These new data considerably increase the knowledge we have of the RSL evolution along the coasts of Western Brittany since the last 8 kyr B.P. From this new dataset, RSL was estimated to rise continuously over the last 8 kyr with a major inflection at ca. 6 kyr cal. BP. Our results show large vertical discrepancies between the RSL records of Brittany and South-Western UK, with the latter plotting several meters below the new data. From this comparison we suggest that the two regions underwent a very different pattern and/or amplitude of subsidence during the last 8 kyr which has implications for the spatial and temporal pattern of the peripheral bulge of the European ice sheets. We compared our data against predictions from Glacio-Isostatic Adjustment models (GIA models). There are large misfits between RSL observations and the predictions of the global (ICE-5G (VM2a) - Peltier, 2004, GLAC1-b - Tarasov and Peltier, 2002; Tarasov et al., 2012, Briggs et al., 2014) and regional UK models ("BIIS" - Bradley et al., 2009; Bradley et al., 2011; "Kuchar"- Kuchar et al., 2012), which can't be resolved through significant changes to the deglaciation history and size of the British-Irish Ice sheet. Paleo-tidal modelling corrections indicate regional changes in the tidal ranges played a negligible role in the data-model misfits. Hence, we propose that the misfits are due to some combination of: (i) unaccounted mass-loss of far-field ice-sheets (Antarctic ice-Sheet or Laurentide Ice-Sheet), (ii) unresolved differences in the deglaciation history and size of the Fennoscandian Ice sheet or, more likely, (iii) ... Article in Journal/Newspaper Antarc* Antarctic Fennoscandian Ice Sheet Università degli Studi di Urbino: CINECA IRIS Quaternary Science Reviews 129 341 365 |
institution |
Open Polar |
collection |
Università degli Studi di Urbino: CINECA IRIS |
op_collection_id |
ftunivurbino |
language |
English |
topic |
Relative sea-level Holocene Isostasy GIA model Tidal-range modelling Earth structure Brittany |
spellingShingle |
Relative sea-level Holocene Isostasy GIA model Tidal-range modelling Earth structure Brittany Goslin, Jérôme Van Vliet Lanoë, Brigitte Bradley, Sarah Tarasov, Lev Neill, Simon Suanez, Serge SPADA, GIORGIO A new Holocene relative sea-level curve for western Brittany (France): Insights on isostatic dynamics along the Atlantic coasts of north-western Europe |
topic_facet |
Relative sea-level Holocene Isostasy GIA model Tidal-range modelling Earth structure Brittany |
description |
This study presents new Relative Sea Level (RSL) data that were obtained in the Finistère region (Western tip of Brittany, France) and the implications those data have for the understanding of the isostatic dynamics across north-western Europe, and more specifically along the Atlantic and Channel coasts. New stratigraphic sequences were obtained and analyzed to derive 24 new Sea-level Index Points, in which 6 are basal. These new data considerably increase the knowledge we have of the RSL evolution along the coasts of Western Brittany since the last 8 kyr B.P. From this new dataset, RSL was estimated to rise continuously over the last 8 kyr with a major inflection at ca. 6 kyr cal. BP. Our results show large vertical discrepancies between the RSL records of Brittany and South-Western UK, with the latter plotting several meters below the new data. From this comparison we suggest that the two regions underwent a very different pattern and/or amplitude of subsidence during the last 8 kyr which has implications for the spatial and temporal pattern of the peripheral bulge of the European ice sheets. We compared our data against predictions from Glacio-Isostatic Adjustment models (GIA models). There are large misfits between RSL observations and the predictions of the global (ICE-5G (VM2a) - Peltier, 2004, GLAC1-b - Tarasov and Peltier, 2002; Tarasov et al., 2012, Briggs et al., 2014) and regional UK models ("BIIS" - Bradley et al., 2009; Bradley et al., 2011; "Kuchar"- Kuchar et al., 2012), which can't be resolved through significant changes to the deglaciation history and size of the British-Irish Ice sheet. Paleo-tidal modelling corrections indicate regional changes in the tidal ranges played a negligible role in the data-model misfits. Hence, we propose that the misfits are due to some combination of: (i) unaccounted mass-loss of far-field ice-sheets (Antarctic ice-Sheet or Laurentide Ice-Sheet), (ii) unresolved differences in the deglaciation history and size of the Fennoscandian Ice sheet or, more likely, (iii) ... |
author2 |
Goslin, Jérôme Van Vliet Lanoë, Brigitte Spada, Giorgio Bradley, Sarah Tarasov, Lev Neill, Simon Suanez, Serge |
format |
Article in Journal/Newspaper |
author |
Goslin, Jérôme Van Vliet Lanoë, Brigitte Bradley, Sarah Tarasov, Lev Neill, Simon Suanez, Serge SPADA, GIORGIO |
author_facet |
Goslin, Jérôme Van Vliet Lanoë, Brigitte Bradley, Sarah Tarasov, Lev Neill, Simon Suanez, Serge SPADA, GIORGIO |
author_sort |
Goslin, Jérôme |
title |
A new Holocene relative sea-level curve for western Brittany (France): Insights on isostatic dynamics along the Atlantic coasts of north-western Europe |
title_short |
A new Holocene relative sea-level curve for western Brittany (France): Insights on isostatic dynamics along the Atlantic coasts of north-western Europe |
title_full |
A new Holocene relative sea-level curve for western Brittany (France): Insights on isostatic dynamics along the Atlantic coasts of north-western Europe |
title_fullStr |
A new Holocene relative sea-level curve for western Brittany (France): Insights on isostatic dynamics along the Atlantic coasts of north-western Europe |
title_full_unstemmed |
A new Holocene relative sea-level curve for western Brittany (France): Insights on isostatic dynamics along the Atlantic coasts of north-western Europe |
title_sort |
new holocene relative sea-level curve for western brittany (france): insights on isostatic dynamics along the atlantic coasts of north-western europe |
publishDate |
2015 |
url |
http://hdl.handle.net/11576/2642389 https://doi.org/10.1016/j.quascirev.2015.10.029 http://www.sciencedirect.com/science/article/pii/S0277379115301505 |
genre |
Antarc* Antarctic Fennoscandian Ice Sheet |
genre_facet |
Antarc* Antarctic Fennoscandian Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000366232300022 volume:129 firstpage:341 lastpage:365 numberofpages:25 journal:QUATERNARY SCIENCE REVIEWS http://hdl.handle.net/11576/2642389 doi:10.1016/j.quascirev.2015.10.029 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84946408779 http://www.sciencedirect.com/science/article/pii/S0277379115301505 |
op_doi |
https://doi.org/10.1016/j.quascirev.2015.10.029 |
container_title |
Quaternary Science Reviews |
container_volume |
129 |
container_start_page |
341 |
op_container_end_page |
365 |
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1796934395258470400 |