My Research Projects

Here, my current research activities developed in the ICE3 (Carottes, Climat, Chimie) research group at the IGE in Grenoble.

Since my PhD I am developing high sensitive optical absorption techniques for measuring concentrations of key atmospheric molecules in gas phase.

The objective of my research is to employ those novel techniques for measuring atmospheric composition of the past (in the ice cores) and present (atmosphere and oceans) for better understanding climate evolution.

Ice core

Study of Climate/Carbon Cycle Coupling The Millennial variability of atmospheric CO2 during the MIS6 period was retrieved with unprecedent resolution and precision during the PhD Thesis of J. Shin (2015-2019). Abrupt changes in atmospheric CO2 were also identified during glacial and early interglacial in the MIS10 and MIS11 periods from the work in collaboration with the University of Bern (Nehrbass-Ahles et al. Science, 2020). This work will now move towards the measurement (…)

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Atmospheric chemistry

Oxidative Capacity at Polar Regions
This project started in 2009 with the development of a femtosecond instrument based of mode-lock cavity-enhanced absorption spectroscopy (ML-CEAS) for detecting high reactive halogen oxide radicals (IO and BrO). Thanks to the broadband feature, the instrument can also measure NO2 and formaldehyde, and it has been employed in the Austral Summer 2011/12 for study the oxidative capacity of the atmosphere at Dumont D’Urville station, in the East coast of (…)

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Aquatic Environments

In situ dissolved gases measurements : CH4, δ13CH4 and C2H6
The SubOcean probe for in situ high resolution measurement of dissolved gases (CH4, δ13CH4 and C2H6) is at its third prototyping. It is now 19 cm diameter, 90 cm long 50 kg of weight and it is designed for deployments down to 3000 m of depth. It was successfully deployed : in the Mediterranean Sea (2014), In the Arctic (2015) at Lake Kivu in Rwanda (2019), at Lake Aiguebelette (2019), in the Black Sea (2019), again in the Black (…)

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