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| Titel |
Contrasting patterns of climatic changes during the Holocene across the Italian Peninsula reconstructed from pollen data |
| VerfasserIn |
O. Peyron, M. Magny, S. Goring, S. Joannin, J.-L. Beaulieu, E. Brugiapaglia, L. Sadori, G. Garfi, K. Kouli, C. Ioakim, N. Combourieu-Nebout |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1814-9324
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| Digitales Dokument |
URL |
| Erschienen |
In: Climate of the Past ; 9, no. 3 ; Nr. 9, no. 3 (2013-06-14), S.1233-1252 |
| Datensatznummer |
250018064
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| Publikation (Nr.) |
 copernicus.org/cp-9-1233-2013.pdf |
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| Zusammenfassung |
Lake-level records from Italy suggest that patterns of precipitation in the
central Mediterranean during the Holocene were divided between the north and
south, but a scarcity of reliable palaeoclimatic records in the north and
central-southern Mediterranean means new evidence is needed to validate this
hypothesis. We provide robust quantitative estimates of Holocene climate in
the Mediterranean region using four high-resolution pollen records from
northern (Lakes Ledro and Accesa) and southern (Lakes Trifoglietti and
Pergusa) Italy. Multiple methods are used to provide an improved assessment
of the palaeoclimatic reconstruction uncertainty. The multi-method approach
uses the pollen-based weighted averaging,
weighted-average partial least-squares regression, modern analogue
technique, and the non-metric multidimensional
scaling/generalized additive model methods. We use independent lake-level
data to validate the precipitation reconstructions.
Our results support a climatic partition between northern and southern Italy
during the Holocene, confirming the hypothesis of opposing mid-Holocene
summer precipitation regimes in the Mediterranean. The northern sites (Ledro,
Accesa) are characterized by minima for summer
precipitation and lake levels during the early to mid-Holocene,
while the southern sites (Trifoglietti, Pergusa) are marked by maxima for
precipitation and lake levels at the same time. Both pollen-inferred
precipitation and lake levels indicate the opposite pattern during the late
Holocene, a maximum in northern Italy and a minimum in southern Italy/Sicily.
Summer temperatures show the same partitioning, with warm conditions in
northern Italy and cool conditions in Sicily during the early/mid-Holocene,
and a reversal during the late Holocene.
Comparison with marine cores from the Aegean Sea suggests that climate
trends and gradients observed in Italy show strong similarities with those
recognized from the Aegean Sea, and more generally speaking in the eastern
Mediterranean. |
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