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Last name: REVEL
First name: Marie
https://lejournal.cnrs.fr/articles/mission-carottage-au-lac-abbe-0
In this study, the accuracy and the precision corresponding to Li isotopic measurements of low level samples such as marine and coastal carbonates are estimated. To this end, a total of fifty‐four analyses of a Li‐pure reference material (Li7‐N) at concentrations ranging from 1 to 6 ng ml−1 were first performed. The average δ7Li values obtained...
International audience
Chemical weathering of silicate rocks on continents acts as a major sink for atmospheric carbon dioxide and has played an important role in the evolution of the Earth's climate. However, the magnitude and the nature of the links between weathering and climate are still under debate. In particular, the timescale over which chemical weathering...
International audience
Silicate weathering of basaltic rocks constitutes a non-negligible sink of atmospheric CO2 but the role it plays in the regulation of past and future global climate is still matter of debate. In this study, silicate weathering rates for various sub-basins of the Ethiopian Traps, emplaced 30 million years ago, and the corresponding atmospheric...
International audience
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International audience
Human-induced environmental disturbances during the Holocene have provided support for the Early Anthropogenic Hypothesis (EAH), which proposes that with the advent of agro-pastoralism and associated deforestation, humans have modified CO2 and CH4 concentrations into the atmosphere. However, only limited evidence exists for human driven...
A multi-proxy study was conducted to test the paleoseismic archive potential of lake sediments in the particularly earthquake sensitive area of the SW Alps (Tinée Valley, Lake Vens, 2331 m). The historical earthquake catalogue shows that moderate to strong earthquakes with intensities of IX-X have impacted the Southern Alps during the last...
Human-induced environmental disturbances during the Holocene have provided support for the Early Anthropogenic Hypothesis (EAH), which proposes that with the advent of agro-pastoralism and associated deforestation, humans have modified CO2 and CH4 concentrations into the atmosphere. However, only limited evidence exists for human driven...
A multi-proxy study was conducted to test the paleoseismic archive potential of lake sediments in the particularly earthquake sensitive area of the SW Alps (Tinée Valley, Lake Vens, 2331 m). The historical earthquake catalogue shows that moderate to strong earthquakes with intensities of IX-X have impacted the Southern Alps during the last...
International audience
The response of eastern Mediterranean Sea (EMS) circulation to climate forcings over the last 95 kyr BP was studied using core MD04-2722, collected at 1780 m water depth within the Levantine Sea. Foraminiferal stable isotopes and benthic assemblages were combined in order to reconstruct deep water ventilation and oxygenation in relation to...
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The Eastern Mediterranean Sea (EMS) is a key region to study circulation change because of its own thermohaline circulation. In this study, we focused on intermediate/deep water circulation since the Last Glacial Maximum (LGM) including the sapropel S1 period. Two cores from the Levantine Sea and the Strait of Sicily, respectively, collected at...
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During the Pleistocene, tropical Africa was the site of significant hydrologic changes related to variations in the intensity of the African monsoon. The socalled African Humid Period (AHP) has been known for some time, the AHP is being revisited today with the aid of innovative geochemical and organic tools such as lithium isotope and...
Multi-proxy analysis of two marine sediment cores (MS27PT and MD04-2726) from the Nile continental slope provides evidence of changes in Nile sediment discharge related to changes in Ethiopian African Monsoon (EAM) precipitation, and allows us to reconstruct changes in Nile River runoff, vegetation and erosion in the Nile headwaters. Sediment...