Concept

Histoire de la Terre

Publications associées (33)

Fiber optic distributed temperature sensing for the determination of the nocturnal atmospheric boundary layer height

A new method for measuring air temperature profiles in the atmospheric boundary layer at high spatial and temporal resolution is presented. The measurements are based on Raman scattering distributed temperature sensing (DTS) with a fiber optic cable attach ...

2011

Variations of air content in Dasuopu ice core from AD 1570-1927 and implications fore climate change

Jérôme Chappellaz

In relation to Arctic warming, the possible occurrence of methane hydrate degassing events has attracted an increasing interest in recent years. We evaluate the atmospheric impact of rapid and massive emissions of methane and how they are imprinted in ice ...

Elsevier BV2011

The origin of 60Fe and other short-lived radionuclides in the early solar system

Anders Meibom

Establishing the origin of short-lived radionuclides (SLRs) with half-lives ≤100 Myr has important implications for the astrophysical context of our Sun's birth place. We review here the different origins proposed for the variety of SLRs present in the sol ...

2010

A 108.83-m ice-core record of atmospheric dust deposition at Mt. Qomolangma (Everest), Central Himalaya

Jérôme Chappellaz

The climate of the last glacial Marine Isotopic Stage 3 (MIS3) period is characterized by strong millennial-scale variability with a succession of Dansgaard-Oeschger events first identified in Greenland ice cores and associated with variations of the Atlan ...

Elsevier BV2010

NanoSIMS: Insights to biogenicity and syngeneity of Archaean carbonaceous structures

Anders Meibom, François Robert

NanoSIMS is a relatively new technology that is being applied to ancient carbonaceous structures to gain insight into their biogenicity and syngeneity. NanoSIMS studies of well preserved organic microfossils from the Neoproterozoic (similar to 0.8Ga) Bitte ...

2009

Selectivity of montmorillonite catalyzed prebiotic reactions of D, L-nucleotides

The montmorillonite-catalyzed reactions of the 5′-phosphorimidazolides of D, L-adenosine (D, L-ImpA) (Figure 1a. N = A, R = H) and D, L-uridine (Figure 1a., N = U, R = H) yields oligomers that were as long as 7 mers and 6 mers, respectively. The reactions ...

2007

Shock-induced transformation of olivine to a new metastable (Mg,Fe)(2)SiO4 polymorph in Martian meteorites

Philippe Gillet, Pierre Beck

Transient high pressures and temperatures generated during meteor or asteroid impacts induce mineral phase transformations that can mimic those occurring at depth within the silicate mantle of terrestrial planets. Olivine (alpha-(Mg,Fe)(2)SiO4), the primar ...

2007

Age of Himalayan bottom ice cores [2]

Jérôme Chappellaz

This paper is part of the special publication Gas hydrates: relevance to world margin stability and climatic change (eds J.P. Henriet and J. Mienert). The Antarctic and Greenland ice contains an almost direct record of past atmospheric CH 4. The record ove ...

Geological Society of London2004

The Hadean upper mantle conundrum: Evidence for source depletion and enrichment from Sm-Nd, Re-Os, and Ph isotopic compositions in 3.71 Gy boninite-like metabasalts from the Isua Supracrustal Belt, Greenland

Anders Meibom, Reto Frei

Here we present Sm-Nd, Re-Os, and Pb isotopic data of carefully screened, least altered samples of boninite-like metabasalts from the Isua Supracrustal Belt (ISB, W Greenland)that characterize their mantle source at the time of their formation. The princip ...

2004

The ZONMET thermodynamic and kinetic model of metal condensation

Anders Meibom

The ZONMET model of metal condensation is a FORTRAN computer code that calculates condensation with partial isolation-type equilibrium partitioning of the 19 most abundant elements among 203 gaseous and 488 condensed phases and growth in the nebula of a zo ...

2003

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