6-kyr record of flood frequency and intensity in the western Mediterranean Alps – Interplay of solar and temperature forcing
Pierre Sabatier
(1)
,
Bruno Wilhelm
(1)
,
Gentile Francesco Ficetola
(2)
,
Fanny Moiroux
,
Jérôme Poulenard
(3)
,
Anne-Lise Develle
(1)
,
Adeline Bichet
(4)
,
Wentao Chen
,
Cécile Pignol
(1)
,
Jean-Louis Reyss
(5, 6)
,
Ludovic Gielly
(2)
,
Manon Bajard
(1)
,
Yves Perrette
(1)
,
Emmanuel Malet
(1)
,
Pierre Taberlet
(2)
,
Fabien Arnaud
(1)
1
EDYTEM -
Environnements, Dynamiques et Territoires de Montagne
2 LECA - Laboratoire d'Ecologie Alpine
3 CARRTEL - Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques
4 LTHE - Laboratoire d'étude des transferts en hydrologie et environnement
5 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
6 OCEANIS - Océan et Interfaces
2 LECA - Laboratoire d'Ecologie Alpine
3 CARRTEL - Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques
4 LTHE - Laboratoire d'étude des transferts en hydrologie et environnement
5 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
6 OCEANIS - Océan et Interfaces
Pierre Sabatier
- Fonction : Auteur
- PersonId : 8569
- IdHAL : pierre-sabatier
- ORCID : 0000-0002-9620-1514
- IdRef : 112919405
Gentile Francesco Ficetola
- Fonction : Auteur
- PersonId : 775074
- ORCID : 0000-0003-3414-5155
- IdRef : 223445401
Fanny Moiroux
- Fonction : Auteur
Jérôme Poulenard
- Fonction : Auteur
- PersonId : 183752
- IdHAL : jerome-poulenard
- IdRef : 145712443
Anne-Lise Develle
- Fonction : Auteur
- PersonId : 4269
- IdHAL : anne-lise-develle
- ORCID : 0000-0003-2824-4106
- IdRef : 253119383
Wentao Chen
- Fonction : Auteur
Cécile Pignol
- Fonction : Auteur
- PersonId : 4566
- IdHAL : cecile-pignol
- ORCID : 0000-0003-4411-8898
- IdRef : 113360193
Yves Perrette
- Fonction : Auteur
- PersonId : 8614
- IdHAL : yves-perrette
- ORCID : 0000-0002-7671-8946
- IdRef : 095700250
Emmanuel Malet
- Fonction : Auteur
- PersonId : 8613
- IdHAL : emmanuel-malet
- IdRef : 229955037
Pierre Taberlet
- Fonction : Auteur
- PersonId : 759735
- ORCID : 0000-0002-3554-5954
- IdRef : 060567376
Fabien Arnaud
- Fonction : Auteur
- PersonId : 8405
- IdHAL : fabien-arnaud
- ORCID : 0000-0002-8706-9902
- IdRef : 081141270
Résumé
The high-resolution sedimentological and geochemical analysis of a sediment sequence from Lake Savine(Western Mediterranean Alps, France) led to the identification of 220 event layers for the last 6000 years.200 were triggered by flood events and 20 by underwater mass movements possibly related to earthquakesthat occurred in 5 clusters of increase seismicity. Because human activity could influence theflood chronicle, the presence of pastures was reconstructed through ancient DNA, which suggested thatthe flood chronicle was mainly driven by hydroclimate variability. Weather reanalysis of historical floodsallow to identify that mesoscale precipitation events called “East Return” events were the main triggersof floods recorded in Lake Savine. The first part of this palaeoflood record (6e4 kyr BP) was characterizedby increases in flood frequency and intensity in phase with Northern Alpine palaeoflood records. Bycontrast, the second part of the record (i.e., since 4 kyr BP) was phased with Southern Alpine palaeofloodrecords. These results suggest a palaeohydrological transition at approximately 4 kyr BP, as has beenpreviously described for the Mediterranean region. This may have resulted in a change of flood-pronehydro-meteorological processes, i.e., in the balance between occurrence and intensity of local convectiveclimatic phenomena and their influence on Mediterranean mesoscale precipitation events in thispart of the Alps. At a centennial timescale, increases in flood frequency and intensity corresponded toperiods of solar minima, affecting climate through atmospheric changes in the Euro-Atlantic sector
Domaines
Milieux et Changements globaux Biodiversité et Ecologie Ingénierie de l'environnement Environnement et Société GéographieFormat du dépôt | Notice |
---|---|
Type de dépôt | Article dans une revue |
Résumé |
en
The high-resolution sedimentological and geochemical analysis of a sediment sequence from Lake Savine(Western Mediterranean Alps, France) led to the identification of 220 event layers for the last 6000 years.200 were triggered by flood events and 20 by underwater mass movements possibly related to earthquakesthat occurred in 5 clusters of increase seismicity. Because human activity could influence theflood chronicle, the presence of pastures was reconstructed through ancient DNA, which suggested thatthe flood chronicle was mainly driven by hydroclimate variability. Weather reanalysis of historical floodsallow to identify that mesoscale precipitation events called “East Return” events were the main triggersof floods recorded in Lake Savine. The first part of this palaeoflood record (6e4 kyr BP) was characterizedby increases in flood frequency and intensity in phase with Northern Alpine palaeoflood records. Bycontrast, the second part of the record (i.e., since 4 kyr BP) was phased with Southern Alpine palaeofloodrecords. These results suggest a palaeohydrological transition at approximately 4 kyr BP, as has beenpreviously described for the Mediterranean region. This may have resulted in a change of flood-pronehydro-meteorological processes, i.e., in the balance between occurrence and intensity of local convectiveclimatic phenomena and their influence on Mediterranean mesoscale precipitation events in thispart of the Alps. At a centennial timescale, increases in flood frequency and intensity corresponded toperiods of solar minima, affecting climate through atmospheric changes in the Euro-Atlantic sector
|
Titre |
en
6-kyr record of flood frequency and intensity in the western Mediterranean Alps – Interplay of solar and temperature forcing
|
Auteur(s) |
Pierre Sabatier
1
, Bruno Wilhelm
1
, Gentile Francesco Ficetola
2
, Fanny Moiroux
, Jérôme Poulenard
3
, Anne-Lise Develle
1
, Adeline Bichet
4
, Wentao Chen
, Cécile Pignol
1
, Jean-Louis Reyss
5, 6
, Ludovic Gielly
2
, Manon Bajard
1
, Yves Perrette
1
, Emmanuel Malet
1
, Pierre Taberlet
2
, Fabien Arnaud
1
1
EDYTEM -
Environnements, Dynamiques et Territoires de Montagne
( 20150 )
- Université de Savoie, Campus scientifique, 73376 Le Bourget du Lac cedex
- France
2
LECA -
Laboratoire d'Ecologie Alpine
( 1041894 )
- bat. D - Biologie 2233 Rue de la piscine - BP 53 38041 GRENOBLE CEDEX 9
- France
3
CARRTEL -
Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques
( 37786 )
- 74200 Thonon-les-Bains, France - 73376 Le Bourget du Lac, France
- France
4
LTHE -
Laboratoire d'étude des transferts en hydrologie et environnement
( 1051958 )
- ENSHMG - Domaine Universitaire 1023-1025 Rue de la piscine - BP 53 38041 GRENOBLE CEDEX 9f
- France
5
LSCE -
Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
( 518 )
- Bât. 12,
avenue de la Terrasse,
F-91198 GIF-SUR-YVETTE CEDEX
- France
6
OCEANIS -
Océan et Interfaces
( 1007945 )
- LSCE. CEA Paris-Saclay. Orme des merisiers. 91190 Saint-Aubin.
- France
|
Nom de la revue |
|
Vulgarisation |
Non
|
Langue du document |
Anglais
|
Date de publication |
2017-08
|
Volume |
170
|
Page/Identifiant |
pp. 121 - 135
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Domaine(s) |
|
Référence interne |
|
Mots-clés |
en
Ancient DNA, Human activity, Lake sediment, Sedimentology, Flood frequency and intensity, Western mediterranean alps, Paleoclimatology, Holocene, Earthquakes, C2FN
|
DOI | 10.1016/j.quascirev.2017.06.019 |
Loading...