Middle- to late-Holocene storminess in Brittany (NW France): Part II - The chronology of events and climate forcing
International audience This study focuses on the recurring climate conditions required for the largest storms occurring in NW France (Brittany). It is based on the analysed records of storm events along Western Brittany coast (see Part I). In this manuscript (Part II), storm recurrence is explored a...
Published in: | The Holocene |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2014
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Subjects: | |
Online Access: | https://insu.hal.science/insu-00945840 https://doi.org/10.1177/0959683613519688 |
id |
ftecolephe:oai:HAL:insu-00945840v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
EPHE (Ecole pratique des hautes études, Paris): HAL |
op_collection_id |
ftecolephe |
language |
English |
topic |
Atlantic Multidecadal Oscillation Brittany North Atlantic Oscillation sea level sea surface temperature storminess [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Atlantic Multidecadal Oscillation Brittany North Atlantic Oscillation sea level sea surface temperature storminess [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes van Vliet-Lanoë, Brigitte Pénaud, Aurélie Hénaff, Alain Delacourt, Christophe Fernane, Assia Goslin, Jérôme Hallégouet, Bernard Le Cornec, Erwan Middle- to late-Holocene storminess in Brittany (NW France): Part II - The chronology of events and climate forcing |
topic_facet |
Atlantic Multidecadal Oscillation Brittany North Atlantic Oscillation sea level sea surface temperature storminess [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience This study focuses on the recurring climate conditions required for the largest storms occurring in NW France (Brittany). It is based on the analysed records of storm events along Western Brittany coast (see Part I). In this manuscript (Part II), storm recurrence is explored along with forcing mechanisms. Periods of more frequent storm events over the two last centuries are analysed first in order to link these events with possible forcing mechanisms (North Atlantic Oscillation (NAO) and Atlantic Multidecadal Oscillation (AMO) modes) triggering the most destructive storms. Then, palaeostorm events are discussed at the Holocene scale, from 6000 yr BP to present, to verify the forcing mechanisms. Most recorded events appear to be linked with cooling episodes, mostly in winter, a transition to or from a negative winter NAO mode, a positive AMO mode. Extreme storms occur immediately prior to the 'Medieval Warm Period' (MWP). Maximum effects are reached prior to the onset of the MWP and during the Maunder and Dalton solar minima. Low storm activity occurred during the Spörer Minimum linked to an acceleration of the Atlantic Meridional Overturning Circulation (AMOC). Main storm triggers seem to correspond to a positive AMO mode with an unstable jetstream configuration driving a negative NAO. In this study, four specific weather configurations were defined to explain each type of recorded storminess. The strongest storms correspond to low AMO and decennial-negative NAO modes (e.g. 'Little Ice Age'), or high AMO in association with dominant low NAO modes, as during the early Middle Age and present-day period. Fresh or warm oceans in association with a positive NAO mode are stormy but with very low sting storms frequency. Although in agreement with the orbital forcing and the Holocene glacial history, increasing storm frequency and intensity is most probably partly biased by continuous sea-level rise and resulting erosion. |
author2 |
Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Littoral, Environnement, Télédétection, Géomatique (LETG - Brest) Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN) Université de Nantes (UN)-Université de Nantes (UN)-Université de Caen Normandie (UNICAEN) Université de Nantes (UN)-Université de Nantes (UN) Centre de Recherche Administrative de Brest (CRA) Université de Brest (UBO)-Institut Brestois des Sciences de l'Homme et de la Société (IBSHS) Université de Brest (UBO)-Université de Brest (UBO) program PHILTRE Program ARTEMIS |
format |
Article in Journal/Newspaper |
author |
van Vliet-Lanoë, Brigitte Pénaud, Aurélie Hénaff, Alain Delacourt, Christophe Fernane, Assia Goslin, Jérôme Hallégouet, Bernard Le Cornec, Erwan |
author_facet |
van Vliet-Lanoë, Brigitte Pénaud, Aurélie Hénaff, Alain Delacourt, Christophe Fernane, Assia Goslin, Jérôme Hallégouet, Bernard Le Cornec, Erwan |
author_sort |
van Vliet-Lanoë, Brigitte |
title |
Middle- to late-Holocene storminess in Brittany (NW France): Part II - The chronology of events and climate forcing |
title_short |
Middle- to late-Holocene storminess in Brittany (NW France): Part II - The chronology of events and climate forcing |
title_full |
Middle- to late-Holocene storminess in Brittany (NW France): Part II - The chronology of events and climate forcing |
title_fullStr |
Middle- to late-Holocene storminess in Brittany (NW France): Part II - The chronology of events and climate forcing |
title_full_unstemmed |
Middle- to late-Holocene storminess in Brittany (NW France): Part II - The chronology of events and climate forcing |
title_sort |
middle- to late-holocene storminess in brittany (nw france): part ii - the chronology of events and climate forcing |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://insu.hal.science/insu-00945840 https://doi.org/10.1177/0959683613519688 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
ISSN: 0959-6836 EISSN: 1477-0911 The Holocene https://insu.hal.science/insu-00945840 The Holocene, 2014, 24 (4), pp.434-453. ⟨10.1177/0959683613519688⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1177/0959683613519688 insu-00945840 https://insu.hal.science/insu-00945840 doi:10.1177/0959683613519688 |
op_doi |
https://doi.org/10.1177/0959683613519688 |
container_title |
The Holocene |
container_volume |
24 |
container_issue |
4 |
container_start_page |
434 |
op_container_end_page |
453 |
_version_ |
1799484941429374976 |
spelling |
ftecolephe:oai:HAL:insu-00945840v1 2024-05-19T07:45:01+00:00 Middle- to late-Holocene storminess in Brittany (NW France): Part II - The chronology of events and climate forcing van Vliet-Lanoë, Brigitte Pénaud, Aurélie Hénaff, Alain Delacourt, Christophe Fernane, Assia Goslin, Jérôme Hallégouet, Bernard Le Cornec, Erwan Domaines Océaniques (LDO) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Observatoire des Sciences de l'Univers-Institut d'écologie et environnement-Centre National de la Recherche Scientifique (CNRS) Littoral, Environnement, Télédétection, Géomatique (LETG - Brest) Littoral, Environnement, Télédétection, Géomatique UMR 6554 (LETG) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Université d'Angers (UA)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Brest (UBO)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut de Géographie et d'Aménagement Régional de l'Université de Nantes (IGARUN) Université de Nantes (UN)-Université de Nantes (UN)-Université de Caen Normandie (UNICAEN) Université de Nantes (UN)-Université de Nantes (UN) Centre de Recherche Administrative de Brest (CRA) Université de Brest (UBO)-Institut Brestois des Sciences de l'Homme et de la Société (IBSHS) Université de Brest (UBO)-Université de Brest (UBO) program PHILTRE Program ARTEMIS 2014-02-07 https://insu.hal.science/insu-00945840 https://doi.org/10.1177/0959683613519688 en eng HAL CCSD London: Sage info:eu-repo/semantics/altIdentifier/doi/10.1177/0959683613519688 insu-00945840 https://insu.hal.science/insu-00945840 doi:10.1177/0959683613519688 ISSN: 0959-6836 EISSN: 1477-0911 The Holocene https://insu.hal.science/insu-00945840 The Holocene, 2014, 24 (4), pp.434-453. ⟨10.1177/0959683613519688⟩ Atlantic Multidecadal Oscillation Brittany North Atlantic Oscillation sea level sea surface temperature storminess [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2014 ftecolephe https://doi.org/10.1177/0959683613519688 2024-04-25T00:46:32Z International audience This study focuses on the recurring climate conditions required for the largest storms occurring in NW France (Brittany). It is based on the analysed records of storm events along Western Brittany coast (see Part I). In this manuscript (Part II), storm recurrence is explored along with forcing mechanisms. Periods of more frequent storm events over the two last centuries are analysed first in order to link these events with possible forcing mechanisms (North Atlantic Oscillation (NAO) and Atlantic Multidecadal Oscillation (AMO) modes) triggering the most destructive storms. Then, palaeostorm events are discussed at the Holocene scale, from 6000 yr BP to present, to verify the forcing mechanisms. Most recorded events appear to be linked with cooling episodes, mostly in winter, a transition to or from a negative winter NAO mode, a positive AMO mode. Extreme storms occur immediately prior to the 'Medieval Warm Period' (MWP). Maximum effects are reached prior to the onset of the MWP and during the Maunder and Dalton solar minima. Low storm activity occurred during the Spörer Minimum linked to an acceleration of the Atlantic Meridional Overturning Circulation (AMOC). Main storm triggers seem to correspond to a positive AMO mode with an unstable jetstream configuration driving a negative NAO. In this study, four specific weather configurations were defined to explain each type of recorded storminess. The strongest storms correspond to low AMO and decennial-negative NAO modes (e.g. 'Little Ice Age'), or high AMO in association with dominant low NAO modes, as during the early Middle Age and present-day period. Fresh or warm oceans in association with a positive NAO mode are stormy but with very low sting storms frequency. Although in agreement with the orbital forcing and the Holocene glacial history, increasing storm frequency and intensity is most probably partly biased by continuous sea-level rise and resulting erosion. Article in Journal/Newspaper North Atlantic North Atlantic oscillation EPHE (Ecole pratique des hautes études, Paris): HAL The Holocene 24 4 434 453 |