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Finding out whether such a link does or does not exist is one of the key questions allowing to better understand solar system formation. Current knowledge suggests that the oxygen isotopic composition of the oldest solar system solids is either caused by molecular self shielding in the solar nebula or by a certain class of chemical reactions. Depending on the mechanism, physico-chemical conditions in the nebula are very different, explaining the interest in this question.

Le satellite PICARD

Le satellite Picard sera lancé ce mardi 15 juin à 16h42, heure de Paris, par une fusée Dniepr depuis la base de Yasny, en Russie. Ce micro satellite français de 143 kg, financé par le CNES, devrait permettre d’améliorer notre connaissance du fonctionnement du Soleil et de mieux comprendre son influence sur le climat de la Terre.

An international team, including French researchers from CNRS and UPMC, have developed a synthetic approach aimed at evaluating CO2 uptake by the oceans. For the first time, scientists have mapped the amounts of CO2 absorbed over the whole North Atlantic.

Global ice-sheets are melting at an increased rate; Arctic sea-ice is disappearing much faster than recently projected, and future sea-level rise is now expected to be much higher than previously forecast, according to a new global scientific synthesis prepared by some of the world’s top climate scientists.

Avion ATR-42

A monitoring campaign to better understand pollution produced by large conurbations will be carried out in the Paris area during the whole month of July.

Does ozone have an impact on the ocean’s role as a “carbon sink”? Yes, according to researchers from three IPSL laboratories. Using original simulations, they have demonstrated that the hole in the ozone layer reduces atmospheric carbon uptake in the Southern Ocean and contributes to the increase in ocean acidity.

Camp de NorthGRIP, sur l'inlandsis du Groenland.

New very high resolution ice cores analyses from Greenland reveal that the climate has changed very suddenly, within a few years, at the end of the last ice age, about 10 000 years ago.

test alt

Epoca aims to better understand ocean acidification, to study its effects on marine biology and to predict them for the next century, and especially to make recommendations to policymakers.

To predict the future evolution of greenhouse gases, to trace their evolutionary past, further and further over the time, is a major issue. In analyzing the Antarctic ice extracted during the EPICA ice drilling project, the French LGGE and IPSL scientists, together with several international partners, managed to push the existing limits.