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Welcome to the National Cosmogenic Nuclides Laboratory - LN2C

The National Cosmogenic Nuclides Laboratory (LN2C in french) is a structure dedicated to the use of cosmogenic nuclides in Earth Sciences, notably via the preparation of samples and the measurements of cosmogenic isotopes. Its mission is to provide an effective access to this methodology to the French scientific community, for research projects in the following fields: natural hazards and risks, linked for example to earthquakes or landslides past climate change, for example with the dating of markers associated to glaciations landscape dynamics and the determination of current and past denudation rates dating of archaeological sites and objects. investigation of the magnetic field evolution over time The LN2C consists of a set of laboratories allowing the purification and preparation of different types of sample (rocks, soils, water, etc.) as well as the measurement of different isotopic ratios (10Be/9Be, 26Al/27Al, 36Cl/35Cl, ...) by the national 5MV AMS (Accelerator Mass Spectrometer) facility ASTER. The LN2C regroups faculty members, research scientists, engineers and technicians from Aix Marseille University, CNRS and IRD. The LN2C was founded by Didier Bourlès (AMU Professor), and is hosted by CEREGE on the Technopôle de l'Arbois domain in Aix-en-Provence since 2006.

The installation of the ASTER instrument was possible due to an initial investment by the Bouches du Rhône General Council, the European Regional Development Fund (FEDER), CNRS, IRD and the Provence-Alpes-Côte d'Azur Region council. The LN2C is a technological platform of Aix-Marseille University and is part of the REGEF network. Its operation is supported by a recurring endowment from CNRS and IRD. The LN2C benefited from the Investments for the Future Program via EQUIPEX ASTER-CEREGE, which notably enabled the installation of a high energy source for ASTER.

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Antarctic Cold Reversal 36Cl cosmic-ray exposure dating Authigenic 10Be/9Be ratio Denudation rate Paleoclimate Cave deposits Panoply Radiocarbon Denudation Climate fluctuations Kerguelen Ardennes massif Asia 26Al Aeolian sedimentation Cl-36 Himalaya 21Ne Cosmogenic burial dating Lake sediment Calibration Block slope Chlore-36 Cosmic ray exposure dating Bearing phases Cosmogenic nuclides Cirque Carbonate Absolute dating Cenozoic Madrid Basin Luminescence dating Paleomagnetism Pleistocene Cameroon Glacier fluctuations Cosmogenic Cosmogenic 10Be Asterobelt Beryllium-10 Active faults Bolivian Altiplano Denudation rates Holocene 42 ka event Evolution Australia Byers Peninsula Analyse isotopique Alluvial terrace chronosequence Antarctic Peninsula Challapata fan-delta Active fault Chlorine Be-10 10Be Burial dating Accelerator mass spectrometry Landscape evolution Chlorine-36 Cosmonuclide Quaternary Aluminum Authigenic 10Be/ 9 Be dating Azanaques Angola Brazilian passive margin escarpment Chlorine 36 Cosmogenic dating Incision rates Paleoseismology 36 cl cosmic-ray exposure dating Automated bench Beryllium Andes Cluster Cave levels Chernobyl 10Be cosmogenic nuclide Lava flows Aurignacien 14CdatingPeruvian Andes Surface exposure dating Calcaire crétacé Acheulian hominins Bhutan COSMOGENIC NUCLIDES Chiba composite section Aquifère côtier Pyrenees Terrestrial cosmogenic nuclides TCN Carbonates Geomorphology Badain jaran desert Climatic crisis Analyse géochimique Ages Climate Buzzsaw CLIMATIC CHANGES Chert


Latest submissions in HAL !

[hal-03353088] The PRECOS framework: Measuring the impacts of the global changes on soils, water, agriculture on territories to better anticipate the future

In a context of increased land and natural resources scarcity, the possibilities for local authorities and stakeholders of anticipating evolutions or testing the impact of envisaged developments through scenario simulation are new challenges. PRECOS’s approach integrates data pertaining to the fields of water and soil resources, agronomy, urbanization, land use and infrastructure etc. It is complemented by a socio-economic and regulatory analysis of the territory illustrating its constraints and stakes. A modular architecture articulates modeling software and spatial and temporal representations tools. It produces indicators in three core domains: soil degradation, water and soil resources and agricultural production. As a territory representative of numerous situations of the Mediterranean Basin (urban pressures, overconsumption of spaces, degradation of the milieus), a demonstration in the Crau’s area (Southeast of France) has allowed to validate a prototype of the approach and to test its feasibility in a real life situation. Results on the Crau area have shown that, since the beginning of the 16th century, irrigated grasslands are the cornerstones of the anthropic-system, illustrating how successfully men’s multi-secular efforts have maintained a balance between environment and local development. But today the ecosystem services are jeopardized firstly by urban sprawl and secondly by climate change. Pre-diagnosis in regions of Emilia-Romagna (Italy) and Valencia (Spain) show that local end-users and policy-makers are interested by this approach. The modularity of indicator calculations and the availability of geo-databases indicate that PRECOS may be up scaled in other socio-economic contexts.

[hal-03353332] The triple oxygen isotope composition of phytoliths, a new proxy of atmospheric relative humidity: controls of soil water isotope composition, temperature, CO2 concentration and relative humidity


[hal-03353205] The triple oxygen isotope composition of phytoliths, a new proxy of atmospheric relative humidity: controls of soil water isotope composition, temperature, CO2 concentration and relative humidity





Catherine Beaussier
Tél. (+33) 4 95 04 41 43
Vincent Godard
Tél. (+33) 4 13 94 92 10

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