News
Event date : 20 September 2018
11h
Campus CNRS de Gif-sur-Yvette
Jean d'Alembert grant program

Université Paris-Saclay hosts prestigious scientists as part of its "Chaires d'Alembert". These laureates give an "inaugural lesson": this seminar intended for all audiences will be given by the laureate of the Chaire, including a presentation by the host team.

Kristof Van Oost is a Research associate of the FNRW (Since 2015 Senior Research Associate) and Professor at Université catholique de Louvain (Belgium), affiliated to the Earth & Life Institute, Faculty of Sciences. 

He holds a Paris-Saclay "Jean d’Alembert" Chair for Researcher.

Summary 

Recent attention on the anthropogenic CO2 budget has strongly focused on the apparent imbalance between CO2 atmospheric increase, emission from fossil fuels and changes in land use, and oceanic uptake.

The residual terrestrial carbon sink is traditionally estimated from the closure of the anthropogenic CO2 budget. Several processes contribute to this net uptake on land which still has large uncertainties. In particular, traditional analysis omit that carbon originally fixed by land plants is continuously displaced laterally along the Earth’s surface, from upland soils to streams and rivers and further down to the ocean.

Using evidence from both experimental and modeling studies, we show that this perturbation of the C cycle is large and has profound implications for the estimation of the amount of carbon stored on land. Finally, we discuss the consequences for the pre-industrial as well as for the present and future atmospheric CO2 budget.

Place

Bibliothèque du LSCE
campus CNRS de Gif-sur-Yvette
bâtiment 12.