The last 7 millennia of vegetation and climate changes at Lago di Pergusa (central Sicily, Italy)
Laura Sadori
(1)
,
Elena Ortu
(2)
,
Odile Peyron
(3)
,
Gianni Zanchetta
(4, 5, 6)
,
Boris Vannière
(3)
,
Marc Desmet
(7)
,
Michel Magny
(3)
1
Department of Vegetation Biology
2 EDYTEM - Environnements, Dynamiques et Territoires de Montagne
3 LCE - Laboratoire Chrono-environnement (UMR 6249)
4 Dipartimiento di Scienze della Terra
5 IGG-CNR - CNR Istituto di Geoscienze e Georisorse [Pisa]
6 Istituto Nazionale di Geofisica e Vulcanologia
7 GéHCO EA6293 - GéoHydrosystèmes COntinentaux
2 EDYTEM - Environnements, Dynamiques et Territoires de Montagne
3 LCE - Laboratoire Chrono-environnement (UMR 6249)
4 Dipartimiento di Scienze della Terra
5 IGG-CNR - CNR Istituto di Geoscienze e Georisorse [Pisa]
6 Istituto Nazionale di Geofisica e Vulcanologia
7 GéHCO EA6293 - GéoHydrosystèmes COntinentaux
Odile Peyron
- Fonction : Auteur
- PersonId : 1192591
- IdHAL : odile-peyron
- ORCID : 0000-0002-7028-6302
- IdRef : 199802378
Boris Vannière
- Fonction : Auteur
- PersonId : 170991
- IdHAL : boris-vanniere
- ORCID : 0000-0002-6779-6053
- IdRef : 22094850X
Marc Desmet
- Fonction : Auteur
- PersonId : 938023
- ORCID : 0000-0002-7580-1406
Michel Magny
- Fonction : Auteur
- PersonId : 5658
- IdHAL : michel-magny
- IdRef : 027001652
Résumé
The aim of this study is to investigate climate changes and human activities under the lens of palynology. Based on a new high-resolution pollen sequence (PG2) from Lago di Pergusa (667 m a.s.l., central Sicily, Italy) covering the last 6700 yr, we propose a reconstruction of climate and landscape changes over the recent past in central Sicily. Compared to former studies from Lago di Pergusa (Sadori and Narcisi, 2001), this work provides a reconstruction of the evolution of vegetation and climate over the last millennia in central Sicily, indeed completing previous results with new pollen data, which is particularly detailed on the last 3000 yr.
Joint actions of increasing dryness, climate oscillations, and human impact shaped the landscape of this privileged site. Lago di Pergusa, besides being the main inland lake of Sicily, is very sensitive to climate change and its territory was inhabited and exploited continuously since the Palaeolithic. The lake sediments turned out to be a good observatory for natural phenomena that occurred in the last thousands of years.
Results of the pollen-based study are integrated with changes in magnetic susceptibility and a tephra layer characterization. The tephra layer was shown to be related to the Sicanians' event, radiocarbon dated at 3055 ± 75 yr BP (Sadori and Narcisi, 2001).
We performed palaeoclimate reconstructions by MAT (Modern Analogues Technique) and WAPLS (Weighted Average Partial Least Square). Palaeoclimate reconstructions based on the core show important climate fluctuations throughout the Holocene. Climate reconstruction points out four phases of cooling and enhanced wetness in the last three millennia (2600–2000, 1650–1100, 850–550, 400–200 cal BP, corresponding to the periods between 650–50 BC, and 300–850, 1100–1400, 1550–1750 AD, respectively). This appears to be the evidence of local responses to global climate oscillations during the recent past.
Domaines
Etudes de l'environnementFormat du dépôt | Notice |
---|---|
Type de dépôt | Article dans une revue |
Titre |
en
The last 7 millennia of vegetation and climate changes at Lago di Pergusa (central Sicily, Italy)
|
Résumé |
en
The aim of this study is to investigate climate changes and human activities under the lens of palynology. Based on a new high-resolution pollen sequence (PG2) from Lago di Pergusa (667 m a.s.l., central Sicily, Italy) covering the last 6700 yr, we propose a reconstruction of climate and landscape changes over the recent past in central Sicily. Compared to former studies from Lago di Pergusa (Sadori and Narcisi, 2001), this work provides a reconstruction of the evolution of vegetation and climate over the last millennia in central Sicily, indeed completing previous results with new pollen data, which is particularly detailed on the last 3000 yr.
Joint actions of increasing dryness, climate oscillations, and human impact shaped the landscape of this privileged site. Lago di Pergusa, besides being the main inland lake of Sicily, is very sensitive to climate change and its territory was inhabited and exploited continuously since the Palaeolithic. The lake sediments turned out to be a good observatory for natural phenomena that occurred in the last thousands of years.
Results of the pollen-based study are integrated with changes in magnetic susceptibility and a tephra layer characterization. The tephra layer was shown to be related to the Sicanians' event, radiocarbon dated at 3055 ± 75 yr BP (Sadori and Narcisi, 2001).
We performed palaeoclimate reconstructions by MAT (Modern Analogues Technique) and WAPLS (Weighted Average Partial Least Square). Palaeoclimate reconstructions based on the core show important climate fluctuations throughout the Holocene. Climate reconstruction points out four phases of cooling and enhanced wetness in the last three millennia (2600–2000, 1650–1100, 850–550, 400–200 cal BP, corresponding to the periods between 650–50 BC, and 300–850, 1100–1400, 1550–1750 AD, respectively). This appears to be the evidence of local responses to global climate oscillations during the recent past.
|
Auteur(s) |
Laura Sadori
1
, Elena Ortu
2
, Odile Peyron
3
, Gianni Zanchetta
4, 5, 6
, Boris Vannière
3
, Marc Desmet
7
, Michel Magny
3
1
Department of Vegetation Biology
( 67741 )
- Italie
2
EDYTEM -
Environnements, Dynamiques et Territoires de Montagne
( 20150 )
- Université de Savoie, Campus scientifique, 73376 Le Bourget du Lac cedex
- France
3
LCE -
Laboratoire Chrono-environnement (UMR 6249)
( 57629 )
- 16, route de Gray - 25030 Besançon Cedex
- France
4
Dipartimiento di Scienze della Terra
( 134218 )
- Italie
5
IGG-CNR -
CNR Istituto di Geoscienze e Georisorse [Pisa]
( 212948 )
- Via G. Moruzzi 1 56124 Pisa
- Italie
6
Istituto Nazionale di Geofisica e Vulcanologia
( 63636 )
- Italie
7
GéHCO EA6293 -
GéoHydrosystèmes COntinentaux
( 210715 )
- Faculté des sciences et techniques bâtiment E Parc Grandmont 37200 TOURS
- France
|
Volume |
9
|
Numéro |
4
|
Page/Identifiant |
1969-1984
|
Langue du document |
Anglais
|
Nom de la revue |
|
Vulgarisation |
Non
|
Comité de lecture |
Oui
|
Audience |
Internationale
|
Date de publication |
2013
|
Domaine(s) |
|
DOI | 10.5194/cp-9-1969-2013 |
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