The Antarctic temperature changes over the past millennia remain more uncertain than in many other continental regions.

The Antarctic ice sheet mass balance is a major component of the sea level budget and results from the difference of two fluxes of a similar magnitude: ice flow discharging in the ocean and net snow accumulation on the ice sheet surface, i.e. the surface mass balance (SMB).

Tropospheric ozone (O3) is key component of air pollution and an important anthropogenic greenhouse gas.

Each glacial – interglacial transition of the Quaternary occurs in a different orbital context leading to various timing for the deglaciation and sequence of high vs low latitudes events.

La circulation atmosphérique des moyennes latitudes conditionne une partie du climat européen et des moyennes et hautes latitudes de l’hémisphère Sud, où elle est également un élément important pour les échanges océan-atmosphère en CO2.

Despite the societal importance of extreme hydroclimate events, few palaeoenvironmental studies of Scandinavian lake sediments have investigated flood occurrences.

  Climate trends in the Antarctic region remain poorly characterized, owing to the brevity and scarcity of direct climate observations and the large magnitude of interannual to decadal-scale climate variability.

  Air enclosed in ice cores provides a unique archive for paleo-climate studies.

As part of its ongoing project on repositories for high-activity, long-lived radioactive waste, a 2000 m deep borehole was drilled by the French Nuclear Waste Agency (ANDRA) in the layered structure of alternating aquifers and aquitards of the Eastern Paris Basin.

The Rhône is characterised by a heavy concentration of nuclear-based industries including nuclear power stations and nuclear sites housing civilian and military facilities.

Bottled waters are increasingly popular in Tunisia. Most of them come from groundwaters, thus raising the question of the long-term availability of the mineral groundwater resources.

Si les dynamiques de l’océan et de l’atmosphère peuvent être représentées par des modèles physiques explicites comme les GCMs, ce n’est plus le cas lorsqu’il s’agit de l’évolution à long terme des calottes de glaces ou bien du cycle du carbone, notamment en réponse aux forçages astronomiques.

Objectives: Stable isotope data provide insight into the reconstruction of ancient human diet. However, cooking may alter the original stable isotope compositions of food due to losses and modifications of biochemical and water components.

We present a comprehensive account of tritium and 3He in the Mediterranean Sea since the appearance of the tritium generated by the atmospheric nuclear-weapon testing in the 1950s and early 1960s, based on essentially all available observations.

Cette étude montre que si le CO2 atmosphérique continue d'augmenter, les différences entre été et hiver des extrêmes d'acidité des océans doubleront d'ici à la fin du siècle.

Une collaboration internationale publie dans Science Advances, le 8 novembre 2017, une synthèse sur deux épisodes climatiques au cours desquels la Terre fut couverte de glace et de neige.

Quinze instruments de musique de l’Égypte ancienne ont été datés par le Laboratoire de mesure du carbone 14, en collaboration avec l’Institut français d’archéologie orientale du Caire et le CNRS (HiSoMA, UMR 5189).

Sélectionné par l’ANR en 2016 et lancé en 2017, l’Institut Convergence Cland a pour objectif d'étudier la vulnérabilité des écosystèmes cultivés face au changement climatique et le contrôle des émissions de gaz à effet dans l’agriculture.

Abstract: The transformation of snow into ice is a complex phenomenon which is difficult to model. Depending on surface temperature and accumulation rate, it may take several decades to millennia for air to be entrapped in ice. The air is thus always younger than the surrounding ice.

A 22.4 m-long shallow firn core was extracted during the 2006/2007 field season from coastal Adélie Land.

  En datant par le 14C, les granules de vers de terre retrouvées dans une séquence de loess, une équipe pluridisciplinaire de chercheurs a permis de donner, pour la première fois, un cadre chronologique à toutes les phases de redoux de la dernière période glaciaire.

  The eruption of Samalas in Indonesia in 1257 ranks among the largest sulfur-rich eruptions of the Common Era with sulfur deposition in ice cores reaching twice the volume of the Tambora eruption in 1815.

  Objectives: Stable isotope data provide insight into the reconstruction of ancient human diet. However, cooking may alter the original stable isotope compositions of food due to losses and modifications of biochemical and water components.

  Abstract: Using  new  high-resolution 10Be  measurements in  the  NGRIP,  EDML  and  Vostok  ice  cores,  together  with previously  published  data  from  EDC,  we  present  an  improved synchronization between Greenland and Antarctic ice cores during the Laschamp geomagnetic excursion ∼41 kyr ago.

Abstract: The Arctic is among the fastest warming regions on Earth, but it is also one with limited spatial coverage of multi-decadal instrumental surface air temperature measurements.

Abstract: Polar ice cores are unique climate archives. Indeed, most of them have a continuous stratigraphy and present high temporal resolution of many climate variables in a single archive.

La mesure des isotopes de l’eau dans des carottes de neige courtes est un outil primordial pour étudier la variabilité climatique récente en Antarctique.

Immigration and mobility in the mediaeval and post-mediaeval periods in Norway has, up until now, mainly been discussed on the basis of historical sources.

Used alone, the isotopic compositions of O and H in ice give insights into the variations of the local temperature, whereas taken together they can provide information on the climatic conditions at the point of origin of the moisture.

The production of hydrogen by serpentinization in ultramafic-hosted hydrothermal systems is simulated by coupling thermodynamic and dynamic modeling in the framework of a thermo-hydraulic single-pass model where a high-temperature hydrothermal fluid moves preferentially through a main canal of high permeability.