Paleoclimate and paleoceanography over the past 20,000 yr in the Mediterranean Sea Basins as indicated by sediment elemental proxies

Ruiz, Francisca Martínez; Kastner, Miriam; Gallego-Torres, David; Rodrigo-Gámiz, Marta; Nieto-Moreno, Vanesa; Ortega-Huertas, M.

doi:10.1016/j.quascirev.2014.09.018

Cited by 171 publications

(98 citation statements)

References 254 publications

(380 reference statements)

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“…In the Northern Hemisphere, the MCA is generally described as a warm period characterized by intense dryness. In the Mediterranean, several studies have highlighted drier conditions during this event (e.g., Wassenburg et al, 2013;Martinez-Ruiz et al, 2015;Bassetti et al, 2016). The same signature is also observed in the Alps and the Rhône watershed, with periods of low lake level and low flood frequency, respectively (e.g., Magny, 2004;Wilhelm et al, 2016).…”

Section: Record Of Holocene Cold Events (Crs)supporting

confidence: 52%

Sedimentary archives of climate and sea-level changes during the Holocene in the Rhône prodelta (NW Mediterranean Sea)

et al. 2016

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Abstract. A 7.38 m long sediment core was collected from the eastern section of the Rhône prodelta (NW Mediterranean) at 67 m water depth. A multi-proxy study (including sedimentary facies, benthic foraminifera, ostracods, and clay mineralogy) provides a multi-decadal to century-scale record of climate and sea-level changes during the Holocene. The early Holocene is marked by alternative silt and clay layers interpreted as distal tempestites deposited in a context of rising sea level. This interval contains shallow infra-littoral benthic meiofauna (e.g., Pontocythere elongata, Elphidium spp., Quinqueloculina lata) and formed between ca. 20 and 50 m water depth. The middle Holocene (ca. 8.3 to 4.5 ka cal. BP) is characterized, at the core site, by a period of sediment starvation (accumulation rate of ca. 0.01 cm yr −1 ) resulting from the maximum landward shift of the shoreline and the Rhône outlet(s). From a sequence stratigraphic point of view, this condensed section, about 35 cm thick, can be identified on seismic profiles as a maximum flooding surface that marks the transition between delta retrogradation and delta progradation. The transition between the early Holocene deposits and the middle Holocene condensed section is marked by a gradual change in all proxy records. Following the stabilization of sea level at a global scale, the late Holocene is marked by the establishment of prodeltaic conditions at the core site, as shown by the lithofacies and by the presence of benthic meiofauna typical of the modern Rhône prodelta (e.g., Valvulineria bradyana, Cassidulina carinata, Bulimina marginata). Several periods of increased fluvial discharge are also emphasized by the presence of species commonly found in brackish and shallow-water environments (e.g., Leptocythere spp.

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Section: Record Of Holocene Cold Events (Crs)supporting

confidence: 52%

Sedimentary archives of climate and sea-level changes during the Holocene in the Rhône prodelta (NW Mediterranean Sea)

et al. 2016

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“…The focus on the Mediterranean regions is due to its sensitivity to global climate changes as result of being a semi-enclosed basin [6]. The Mediterranean Sea is hydrologically and climatically depending on the Atlantic Ocean.…”

Section: Study Area: the Golf Of Gabes Within A Mediterranean Sea Andmentioning

confidence: 99%

Spectral Analysis of a Core from the Sebkha of Sidi Mansour, Southern Tunisia: The Holocene Cyclostratigraphy

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2015

J Geophys Remote Sens

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The Milancovitch Theory explaining the ancient cyclostratigraphy does not file a case for the Holocene cyclostratigraphy. Instead, other astronomical and oceanographic mechanisms control the cyclicity within Holocene sediment. This work aimed to find out the climatic cyclicity along a core from the sebkha of Sidi Mansour located along the Mediterranean coast in Tunisia, through using different proxies: the magnetic susceptibility, carbonate percentages and chemical elements (Ca, Na, and K). Based on previous radiocarbon and tephrochrnological dating in the study area, the core was estimated to cover the two last millennia with a sedimentation rate of 0.35 mm/yr. This rate allows the elaboration of a depth-age model to carry the spectral analysis. Not all the proxies visualize the same climatic cycles. For instance, the spectral analysis of the magnetic susceptibility and Sodium data visualized a 1000 yr cycle. The spectral analysis of Potassium data did not visualize significant cycles. The spectral analysis of the carbonate percentages and calcium data visualized dual cycles of 1700-700 yr and 493-329 yr respectively. The about 500 yr and 1000 yr cycles are related to Sun activity. Other oceanographic and atmospheric factors could generate other cycles of 1700 yr, 700 yr, 493 yr, and 329 yr. The majority of these cycles were worldwide recorded as interplay between the oceanography and the solar forcing. Contrary to the earth-driven cyclostratigraphy related to orbital parameters and geographical positions, the Holocene cyclostratigraphy is sun-driven.

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“…Only a few sediment cores, from the Padul peat bog and the Fuentillejo Maar, penetrate into sediments representing the Last Glacial Maximum (Pons and Reille, 1988;Vegas et al, 2010). Consequently, our current understanding of the Late Pleistocene history of southern Spain, including its vegetation history, is predominantly based on data from marine sediment records, specifically from the Atlantic margin off Portugal (Voelker and de Abreu, 2011), the Gulf of Cádiz (Toucanne et al, 2007), and the Alboran Sea (Martrat et al, 2014;Martinez-Ruiz et al, 2015). These records, however, integrate over large areas and thus lack sensitivity to detect the influence of climatic changes on regional scales.…”

Section: Introductionmentioning

confidence: 99%

Modern sedimentation processes in Laguna de Medina, southern Spain, derived from lake surface sediment and catchment soil samples

et al. 2016

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Paleoclimate and paleoceanography over the past 20,000 yr in the Mediterranean Sea Basins as indicated by sediment elemental proxies

Cited by 171 publications

References 254 publications

Sedimentary archives of climate and sea-level changes during the Holocene in the Rhône prodelta (NW Mediterranean Sea)

Sedimentary archives of climate and sea-level changes during the Holocene in the Rhône prodelta (NW Mediterranean Sea)

Spectral Analysis of a Core from the Sebkha of Sidi Mansour, Southern Tunisia: The Holocene Cyclostratigraphy

Modern sedimentation processes in Laguna de Medina, southern Spain, derived from lake surface sediment and catchment soil samples

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