Contrasting vegetation response during Heinrich events 4, 5 and 6 in Western Europe
Tiffanie Fourcade
(1, 2)
,
María F Sánchez Goñi
(3, 2)
,
Jonathan Lesven
(4, 5)
,
Christelle Lahaye
(6, 1)
,
Anne Philippe
(7)
1
Archéosciences Bordeaux
2 EPOC - Environnements et Paléoenvironnements OCéaniques
3 EPHE - École Pratique des Hautes Études
4 LCE - Laboratoire Chrono-environnement (UMR 6249)
5 Institut de recherche sur les forêts
6 IRAMAT-CRP2A - IRAMAT-Centre de recherche en physique appliquée à l’archéologie
7 LMJL - Laboratoire de Mathématiques Jean Leray
2 EPOC - Environnements et Paléoenvironnements OCéaniques
3 EPHE - École Pratique des Hautes Études
4 LCE - Laboratoire Chrono-environnement (UMR 6249)
5 Institut de recherche sur les forêts
6 IRAMAT-CRP2A - IRAMAT-Centre de recherche en physique appliquée à l’archéologie
7 LMJL - Laboratoire de Mathématiques Jean Leray
Tiffanie Fourcade
- Fonction : Auteur
- PersonId : 1136163
- IdHAL : tiffanie-fourcade
María F Sánchez Goñi
- Fonction : Auteur
- PersonId : 817960
- ORCID : 0000-0001-8238-7488
- IdRef : 057015627
Jonathan Lesven
- Fonction : Auteur
- PersonId : 1173029
- ORCID : 0000-0002-9401-8310
Christelle Lahaye
- Fonction : Auteur
- PersonId : 170786
- IdHAL : christelle-lahaye
- ORCID : 0000-0003-2215-9015
- IdRef : 105669091
Anne Philippe
- Fonction : Auteur
- PersonId : 3518
- IdHAL : anne-philippe
- IdRef : 078845483
Résumé
Deep-sea and terrestrial records allow to document the amplitude, timing and duration of the oceanic and vegetation responses to orbital and millennial-scale changes, in particular during North Atlantic cooling events (Heinrich events, HEs) in Western Europe during the Last Glacial Period (~115- 27 ka).
We propose a multiproxy study based on two deep-sea cores retrieved in the Bay of Biscay (MD04-2845) and the Gulf of Lion (MD99-2343) to reconstruct vegetation and climatic changes in southwestern and southeastern France during Heinrich stadials 4, 5 and 6. These records are well chronologically constrained by numerical dating (new IRSL ages for the MD04-2845 deep-sea core) and new age-depth models, based on Bayesian statistics and stratigraphic constrains using ChronoModel software and ArchaeoPhases R-package.
The comparison of both deep-sea cores with other terrestrial and marine records from NE Atlantic and NW Mediterranean regions show different magnitudes in the semi-desert expansions following Heinrich Stadials (HS, 4, 5 and 6) in Western Europe. Although in southwestern France, the development of the semi-desert is more pronounced during HS6 compared to HS 4 and 5, in the southeast, this stadial is marked by forest development. These contrasted responses during these events appear to be the result of different intensities of the thermohaline circulation and local oceanic processes associated with the instability of the Laurentian ice sheet.
Format du dépôt | Notice |
---|---|
Type de dépôt | Poster de conférence |
Titre |
en
Contrasting vegetation response during Heinrich events 4, 5 and 6 in Western Europe
|
Résumé |
en
Deep-sea and terrestrial records allow to document the amplitude, timing and duration of the oceanic and vegetation responses to orbital and millennial-scale changes, in particular during North Atlantic cooling events (Heinrich events, HEs) in Western Europe during the Last Glacial Period (~115- 27 ka).
We propose a multiproxy study based on two deep-sea cores retrieved in the Bay of Biscay (MD04-2845) and the Gulf of Lion (MD99-2343) to reconstruct vegetation and climatic changes in southwestern and southeastern France during Heinrich stadials 4, 5 and 6. These records are well chronologically constrained by numerical dating (new IRSL ages for the MD04-2845 deep-sea core) and new age-depth models, based on Bayesian statistics and stratigraphic constrains using ChronoModel software and ArchaeoPhases R-package.
The comparison of both deep-sea cores with other terrestrial and marine records from NE Atlantic and NW Mediterranean regions show different magnitudes in the semi-desert expansions following Heinrich Stadials (HS, 4, 5 and 6) in Western Europe. Although in southwestern France, the development of the semi-desert is more pronounced during HS6 compared to HS 4 and 5, in the southeast, this stadial is marked by forest development. These contrasted responses during these events appear to be the result of different intensities of the thermohaline circulation and local oceanic processes associated with the instability of the Laurentian ice sheet.
|
Auteur(s) |
Tiffanie Fourcade
1, 2
, María F Sánchez Goñi
3, 2
, Jonathan Lesven
4, 5
, Christelle Lahaye
6, 1
, Anne Philippe
7
1
Archéosciences Bordeaux
( 1084285 )
- Maison de l'Archéologie, 8 Esplanade des Antilles, Université Bordeaux-Montaigne, F-33607 PESSAC Cedex, France
- France
2
EPOC -
Environnements et Paléoenvironnements OCéaniques
( 778 )
- Avenue des Facultés - 33405 TALENCE CEDEX
- France
3
EPHE -
École Pratique des Hautes Études
( 110691 )
- 4-14 Rue Ferrus, 75014 Paris
- France
4
LCE -
Laboratoire Chrono-environnement (UMR 6249)
( 57629 )
- 16, route de Gray - 25030 Besançon Cedex
- France
5
Institut de recherche sur les forêts
( 1068542 )
- Canada
6
IRAMAT-CRP2A -
IRAMAT-Centre de recherche en physique appliquée à l’archéologie
( 399901 )
- Maison de l’archéologie
Esplanade des Antilles
33607 Pessac Cedex
- France
7
LMJL -
Laboratoire de Mathématiques Jean Leray
( 1088590 )
- France
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Audience |
Internationale
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Comité de lecture |
Oui
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Vulgarisation |
Non
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Langue du document |
Anglais
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Titre du congrès |
Journée d’Echanges ScienTifiques EPOC
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Date début congrès |
2023-09-13
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Date fin congrès |
2023-09-14
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Ville |
Talence
|
Pays |
France
|
Actes |
Non
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Domaine(s) |
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Organisateur du congrès |
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Financement |
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