Concept
Géochimie isotopique
Publications associées (234)
Correlation of boron isotopic composition with ultrastructure in the deep- sea coral Lophelia pertusa: Implications for biomineralization and paleo-pH
Using the CRPG-CNRS Cameca 1270 ion microprobe facility, we have measured boron isotopic compositions (B-11/B-10) in different ultrastructural components of the deep-sea aragonitic scleractinian coral Lophelia pertusa. We observe a systematic difference in ...
2007Holocene climate change in the eastern Mediterranean region: A comparison of stable isotope and pollen data from Lake Gōlhisar, southwest Turkey
Stable isotope and pollen data from Gölhisar Gölü, a small intramontane lake located in southwest Turkey, provide complementary records of Holocene climate change. Modern oxygen and hydrogen isotope water data are used as a means of comparing present-day i ...
2007Summer temperature trend over the past two millennia using air content in Himalayan ice
A historical record of changes in the N2O isotope composition is important for a better understanding of the global N2O atmospheric budget. Here we have combined measurements of trapped gases in the firn and in ice cores of one Arctic site (North GReenland ...
Copernicus GmbH2007Distributed, high-resolution modelling of 18O signals in a meso-scale catchment
A combined simulation of runoff dynamics and distributed transport of the stable isotope oxygen-18 (18O) was performed in the mountainous Dreisam basin (258 km2) in the southwest of Germany. For this purpose, a mixing cell solute routing scheme was impleme ...
2007Quantum state-resolved studies of direct and precursor-mediated dissociative chemisorption of silane on Si(100)
In this work, I present the results of my studies on the state-resolved reactivity of silane (SiH4) on the Si(100)-(2x1) surface. The results demonstrate a co-existence of both a direct and a precursor mediated mechanisms for the dissociative chemisorption ...
EPFL2007Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica
Methane is a strong greenhouse gas and large uncertainties exist concerning the future evolution of its atmospheric abundance. Analyzing methane atmospheric mixing and stable isotope ratios in air trapped in polar ice sheets helps in reconstructing the evo ...
Copernicus GmbH2007Cavity ring-down spectroscopy of jet-cooled silane isotopologues in the Si-H stretch overtone region
Rainer Beck, Régis Bisson, Marco Sacchi, Thanh Tung Dang
Absorption spectra of silane in the region of the first overtone of the Si-H stretch vibration have been recorded in a seeded supersonic jet expansion by cavity ring-down spectroscopy as well as in a static gas cell at room temperature by photoacoustic spe ...
2007Nitrogen and carbon isotopic composition of the Sun inferred from a high-temperature solar nebular condensate
Anders Meibom, François Robert
We report high-precision measurements of nitrogen and carbon isotopic compositions of a carbon-bearing titanium-nitride (osbornite) in a calcium-aluminum-rich inclusion (CAI) from the CH/CB-like carbonaceous chondrite Isheyevo. The mineralogy and petrograp ...
2007Synchronization of ice core records via atmospheric gases
We present the first reconstruction of the Northern Hemisphere (NH) high latitude atmospheric carbon monoxide (CO) mole fraction from Greenland firn air. Firn air samples were collected at three deep ice core sites in Greenland (NGRIP in 2001, Summit in 20 ...
Copernicus GmbH2007Direct validation of in vivo localized 13C MRS measurements of brain glycogen
With the use of localized 13C MRS in conjunction with [1-(13)C]-D-glucose infusion, it is possible to study brain glycogen metabolism in vivo. The purpose of this study was to validate in vivo 13C MRS measurements by comparing them with results from a stan ...
Wiley-Blackwell2007