Approche climatique de la période romaine dans l’est du Var : recherche et analyse des composantes périodiques sur un concrétionnement centennal (ier-iie siècle apr. J.-C.) de l’aqueduc de Fréjus

Abstract

Approche climatique de la période romaine dans l'est du Var : recherche et analyse des composantes périodiques sur un concrétionnement centennal (I er-II e siècle apr. J.-C.) de l'aqueduc de Fréjus Climatic approach of the roman period in eastern Var : research and analysis of periodic components of a centennial concrétion of the Fréjus aqueduct (1-2 nd AD

Climate dynamics and fluid mechanics: Natural variability and related uncertainties

“…The successive-bifurcation theory appears therewith to be fairly complete for barotropic, singlelayer models of the double-gyre circulation. This theory also provides a self-consistent, plausible explanation for the climatically important 7-year and 14-year oscillations of the oceanic circulation and the related atmospheric phenomena in and around the North-Atlantic basin [11,12,24,25,26,27,28,29,45,46]. The dominant 7-and 14-year modes of this theory also survive perturbation by seasonal-cycle changes in the intensity and meridional position of the westerly winds [52].…”

“…An idealized view of the amount of potential vorticity injected into the ocean circulation by the trade winds, westerlies and polar easterlies is shown to the right. variables, such as sea surface temperature (SST) over the North Atlantic or sea level pressure (SLP) over western Europe [24,25,26] and local surface air temperatures in Central England [27], as well as of proxy records, such as tree rings in Britain, travertine concretions in southeastern France [28], and Nile floods over the last millennium or so [29], all exhibit strikingly robust oscillatory behavior with a 7-yr period and, to a lesser extent, with a 14-yr period. Variations in the path and intensity of the Gulf Stream are most likely to exert a major influence on the climate in this part of the world [30].…”

Extreme storms during the last 6500 years from lagoonal sedimentary archives in the Mar Menor (SE Spain)

“…This suggests that the MEM is maximally noncommittal regarding the unmeasured data (Harremoës and Topsoe, 2001). The spectrum obtained by this method shows an excellent frequency resolution with sharp spectral features (Berger et al, 1991;Dubar, 2006;Pardo-Iguzquiza and Rodriguez-Tovar, 2006). The MTM is a non-parametric method that (1) reduces the variance of spectral estimates by combining multiple orthogonal windows in the time domain before Fourier transforming and (2) provides a narrowband F test useful for assessing the significance of periodic components (Thomson, 1982(Thomson, , 1990Percival and Walden, 1993).…”

High‐resolution (Pixe) Analyses of Carbonate Deposits in a Roman Aqueduct (Fréjus, Se France): Implications for the Study of Palaeohydrological Variability and Water Resources Management in Southern Gaul During the Roman Period*

“…2000; Pentecost 2005) accumulated along the internal sidewalls of the aqueduct channels (Adolphe 1973; Fabre and Fiches 1986; Bonté 1999; Blanc 2000; Guendon and Vaudour 2000; Joseph et al . 2000; Bobée 2002; Dubar 2006; Carlut et al . 2009).…”

“…A means of answering this question is provided by the study of Ca-carbonate deposits (also called travertine- Fouke et al 2000;Pentecost 2005) accumulated along the internal sidewalls of the aqueduct channels (Adolphe 1973;Fabre and Fiches 1986;Bonté 1999;Blanc 2000;Guendon and Vaudour 2000;Joseph et al 2000;Bobée 2002;Dubar 2006;Carlut et al 2009). These deposits are organized as speleothems (cave deposits) with the succession of alternating clear and dark millimetric to sub-millimetric laminae (Baker et al 1993;Genty and Quinif 1996;Genty et al 1997;Frisia et al 2000).…”