A long lacustrine record from the Piànico-Sèllere Basin (Middle-Late Pleistocene, Northern Italy)

Moscariello, Andrea; Ravazzi, Cesare; Brauer, Achim; Mangili, Clara; Chiesa, Sergio; Rossi, Sabina; Beaulieu, J.‐L. de; Reille, Maurice

doi:10.1016/s1040-6182(00)00064-1

Cited by 53 publications

(55 citation statements)

References 20 publications

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“…Stoppani, 1857), mainly for its fossil content. A detailed stratigraphic study was published by Moscariello et al (2000).…”

Section: Datamentioning

confidence: 99%

“…The size of the palaeolake has been reconstructed to about 3 km in length and 500-800 m in width (Casati, 1968). The palaeocatchment area of Piànico-Sèllere Lake has been estimated to be less than 13 km 2 (Moscariello et al, 2000).…”

Section: Datamentioning

confidence: 99%

“…The lacustrine sequence that forms the Piànico Formation (Moscariello et al, 2000) is a 48 m thick stratigraphic interval that includes four units. For the palaeoflood data set created here, only the 9.5 m unit called BVC (Banco Varvato Carbonatico or carbonate varved bed) will be considered (described more fully below).…”

Section: Datamentioning

confidence: 99%

“…The BVC 9.5 m unit constitutes an almost continuous succession of about 15 500 rhythmites (alternating layers of dark and light sediment), 0.2-0.8 mm thick (Moscariello et al, 2000). These endogenic calcite rhythmites have been interpreted to be varves (annual cycles) as they have a structure very similar to Holocene Alpine lake varves, in which calcite precipitation takes place in spring and summer (Kelts and Hsü, 1978;Moscariello et al, 2000).…”

Section: Datamentioning

confidence: 99%

“…These endogenic calcite rhythmites have been interpreted to be varves (annual cycles) as they have a structure very similar to Holocene Alpine lake varves, in which calcite precipitation takes place in spring and summer (Kelts and Hsü, 1978;Moscariello et al, 2000). The Piànico-Sèllere varved sequence formed under interglacial conditions, as testified by the flora remains included in the sediments (e.g.…”

Section: Datamentioning

confidence: 99%

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Analysis and modelling of a 9.3 kyr palaeoflood record: correlations, clustering, and cycles

Witt

Malamud

Mangili

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. In this paper, we present a unique 9.5 m palaeolacustrine record of 771 palaeofloods which occurred over a period of 9.3 kyr in the Piànico-Sèllere Basin (southern Alps) during an interglacial period in the Pleistocene (sometime from 780 to 393 ka) and analyse its correlation, clustering, and cyclicity properties. We first examine correlations, by applying power-spectral analysis and detrended fluctuation analysis (DFA) to a time series of the number of floods per decade, and find weak long-range persistence: a power-spectral exponent β PS ≈ 0.39 and an equivalent power-spectral exponent from DFA, β DFA ≈ 0.25. We then examine clustering using the one-point probability distribution of the inter-flood intervals and find that the palaeofloods cluster in time as they are Weibull distributed with a shape parameter k W = 0.78. We then examine cyclicity in the time series of number of palaeofloods per year, and find a period of about 2030 years. Using these characterizations of the correlation, clustering, and cyclicity in the original palaeoflood time series, we create a model consisting of the superposition of a fractional Gaussian noise (FGN) with a 2030-year periodic component and then peaks over threshold (POT) applied. We use this POT FGN+Period model to create 2 600 000 synthetic realizations of the same length as our original palaeoflood time series, but with varying intensity of periodicity and persistence, and find optimized model parameters that are congruent with our original palaeoflood series. We create long realizations of our optimized palaeoflood model, and find a high temporal variability of the flood frequency, which can take values of between 0 and > 30 floods century −1 . Finally, we show the practical utility of our optimized model realizations to calculate the uncertainty of the forecasted number of floods per century with the number of floods in the preceding century. A key finding of our paper is that neither fractional noise behaviour nor cyclicity is sufficient to model frequency fluctuations of our large and continuous palaeoflood record, but rather a model based on both fractional noise superimposed with a long-range periodicity is necessary.

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“…Stoppani, 1857), mainly for its fossil content. A detailed stratigraphic study was published by Moscariello et al (2000).…”

Section: Datamentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

Section: Datamentioning

confidence: 99%

See 3 more Smart Citations

Analysis and modelling of a 9.3 kyr palaeoflood record: correlations, clustering, and cycles

Witt

Malamud

Mangili

et al. 2017

Hydrol. Earth Syst. Sci.

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Tephrochronological dating of varved interglacial lake deposits from Piànico‐Sèllere (Southern Alps, Italy) to around 400 ka

Brauer

Wulf

Mangili

et al. 2006

J Quaternary Science

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2006. Tephrochronological dating of varved interglacial lake deposits from Piànico-Sèllere (Southern Alps, Italy) to around 400 ka.ABSTRACT: The sediment record from the Piànico palaeolake in the southern Alps is continuously varved, spans more than 15 500 years, and represents a key archive for interglacial climate variability at seasonal resolution. The stratigraphic position of the Piànico Interglacial has been controversial in the past. The identification of two volcanic ash layers and their microscopic analysis provides distinct marker layers for tephrochronological dating of these interglacial deposits. In addition to micro-facies analyses reconstructing depositional processes of both tephra layers within the lake environment, their mineralogical and geochemical composition has been determined through major-element electron probe micro-analysis on glass shards. Comparison with published tephra data traced the volcanic source regions of the Piànico tephras to the Campanian volcanic complex of Roccamonfina (Italy) and probably the Puy de Sancy volcano in the French Massif Central. Available dating of near-vent deposits from the Roccamonfina volcano provides a robust tephrochronological anchor point at around 400 ka for the Piànico Interglacial. These deposits correlate with marine oxygen isotope stage (MIS) 11 and thus are younger than Early to Middle Pleistocene previously suggested by K/Ar dating and older than the last interglacial as inferred from macrofloral remains and the geological setting.

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Reply: Tephrochronological dating of varved interglacial lake deposits from Piànico‐Sèllere (Southern Alps, Italy) to around 400 ka

Brauer

Wulf

Mangili

et al. 2007

J Quaternary Science

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A long lacustrine record from the Piànico-Sèllere Basin (Middle-Late Pleistocene, Northern Italy)

Cited by 53 publications

References 20 publications

Analysis and modelling of a 9.3 kyr palaeoflood record: correlations, clustering, and cycles

Analysis and modelling of a 9.3 kyr palaeoflood record: correlations, clustering, and cycles

Tephrochronological dating of varved interglacial lake deposits from Piànico‐Sèllere (Southern Alps, Italy) to around 400 ka

Reply: Tephrochronological dating of varved interglacial lake deposits from Piànico‐Sèllere (Southern Alps, Italy) to around 400 ka

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A long lacustrine record from the Piànico-Sèllere Basin (Middle-Late Pleistocene, Northern Italy)

Cited by 53 publications

References 20 publications

Analysis and modelling of a 9.3 kyr palaeoflood record: correlations, clustering, and cycles

Analysis and modelling of a 9.3 kyr palaeoflood record: correlations, clustering, and cycles

Tephrochronological dating of varved interglacial lake deposits from Piànico‐Sèllere (Southern Alps, Italy) to around 400 ka

Reply: Tephrochronological dating of varved interglacial lake deposits from Piànico‐Sèllere (Southern Alps, Italy) to around 400 ka

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Analysis and modelling of a 9.3 kyr palaeoflood record: correlations, clustering, and cycles

Analysis and modelling of a 9.3 kyr palaeoflood record: correlations, clustering, and cycles