Team members

My thesis work consists in constraining the mechanisms of formation of nitrate and sulphate aerosols in urban polar and alpine environments, and in particular during winter. For this, I collect atmospheric samples and analyze their isotopic composition. This unique approach makes it possible to trace the sources of precursor gases, such as nitrogen oxides, as well as the different formation paths of secondary particles. The interpretations of these in-situ measurements will be supported by experiments in a simulation chamber and by photochemical box modeling. This project is partly supported by the program ALPACA and is the result of a very close collaboration between LATMOS and IGE.

I am a CNRS research engineer (IRHC) specializing in glaciology, snowpack chemistry and isotopic geochemistry. I am the technical manager of PANDA / ISOTOPE (ANalytical Plateau Dedicated to the Glacial Archives). I am also Deputy Director of the IGE, delegate for risk prevention, IT HR strategy and polar correspondent.

My research focuses on reconstructing climate dynamics over the past 1.5 Ma by using polar ice core datasets and linking them to other natural archives and to modelling exercises. Using such a multi-archive approach requires also to overcome the major challenge of defining robust and coherent age models amongst the various archives. I currently lead the MOPGA HOTCLIM project which aims at characterising and understanding regional climate changes, processes and feedbacks during past warm intervals (interglacials).

I am working on numerical modelling using inverse methods, constrained by radar observations, to compute the age-depth profile in Antarctic ice. I am currently using a 1D model and focussing on Little Dome C in Antarctica in order to make predictions about the Beyond EPICA - Oldest Ice (BE-OI) drill project. During my PhD, I also plan to develop a 3D model which will take into account horizontal flow and can therefore be applied to different regions of Antarctica. I am part of the DEEPICE International Training Network which has 15 PhD student across Europe who aim to develop the tools needed to analyse the BE-OI core.

Research engineer in glaciology and isotopic geochemistry. I provide support for analytical development and supervision, particularly for the processing of glacial samples and their isotopic analysis. My research work has focused on volcanic eruptions records in Antarctic ice cores, and on the power of these eruptions, through the isotopic analysis of sulfate. br/>

I am IRD Research Engineer (IRHC) specializing in Glaciology and Chemistry of snow / ice, Technical Manager of PANDA / CHEMISTRY (ANalytical Platform Dedicated to the Glacial Archives) and co -founder of the project ICE MEMORY. Glaciologist and geochemist, I specialize in reconstructing the climate and the past environment from ice cores extracted from the highest glaciers in the world (Andes, Himalayas). Animator of French research around non-polar ice cores, I coordinated and participated in the majority of French and international drilling missions in the Andes and other high altitude sites. Since its creation in 2015, I have been coordinating the Ice Memory project with the various partners. Within the framework of the IRD, I carry out my research in partnership with institutions and universities of the “South”, through long missions or multi-year assignments abroad, mainly in the Andes (Bolivia 2006-2010, and 2015- 2019). Monitoring and understanding glacial retreat, the impact of human activity, and the link between glaciers and the atmosphere are central to my research. These results consolidate the understanding of hydrological cycles and the evolution of water resources.

At the interface between physics and environmental sciences, I am promoting innovative experiments, employing optical techniques, for investigating climate-geochemistry coupling at different time scales and in different media : atmosphere, ice and water. I am also coordinating of the OSUG Spectroscopy workshop, part of the commission spécialisée instrumentation innovante et transverse (CSIIT) which supports the DIIRO, INSU’s scientific deputy directorate and coordinator of the ICE3 team.

My PhD revolves around the reconstruction of carbon cycle / climate interactions between 600 and 800 thousand years ago inferred from the trapped air analysis of the deepest sections of the EPICA Dome C (EDC) Antarctic ice core. To that aim and as a first step, new gas measurements will be performed at IGE (total air content) and at the Laboratoire des Sciences du Climat et de l’Environnement (δO2/N2 and δ18Oatm). The new dataset will be integrated in the dating tool PALEOCHRONO in order to improve the chronology of the EDC ice core. Then, new measurements of atmospheric greenhouse gases concentrations (CO2, CH4) and unprecedented carbon isotopes measurements (δ13CO2) will be conducted on the national analytical platform PANDA at IGE, including the use of a new optical spectrometer. The assessment of this ancient ice is conducted in the framework of the ANR ToBE (Towards Beyond EPICA), which aims to develop and implement several tools and methods for the future analysis of the Beyond EPICA oldest ice core (1,5 Ma).

I am working on an Ice Memory ice core from the Col du Dôme (Mont Blanc). Through chemical and isotopic composition, I am trying to measure anthropogenic impact on the environment and to find the sources of pollution over the last century in Europe. Facing the environmental problem, I am convinced that both research and transmission of knowledge are essential, hence guiding my daily choices.

I develop and use models of physics and chemistry of the atmosphere and of the compacted snow (the firn) for the interpretation of signals recorded in the polar snow and ice. I am involved in the project Beyond EPICA Oldest Ice in which I co-lead the signal preservation in ice consortium, the project MOPGA HOTCLIM of Emilie Capron and the European training network DEEPICE. I coordinate the CNRS INSU LEFE-IMAGO PROXYNNOV project which aims to improve proxies and their interpretation for BE-OI drilling. I am also involved in teaching and scientific communication actions, in particular to raise awareness about climate change. I am deputy director of the doctoral school STEP and member of the scientific board of CNRS-INSU program LEFE/IMAGO.

As part of the BIOCOD ANR project, I implement an original MIR (around 4.35 µm) spectrometer ISOCARB. This setup allows to measure the CO2 concentration as well as the d13CO2 in gas bubble of ice cores. d13CO2 being a earth biomass amount proxy, the setup provide datas for the understanding of the evolution of the coupling between climate and carbon cycle on millenary scale during quaternary as well as mecanisms at stake.

I am the French manager of both the European H2020 Beyond EPICA Oldest Ice project and the French-Russian IRP "Ice archives". I work on problems related to the age of ice and air bubbles in polar ice sheets, for exemple the dating of ice cores or the localisation of oldest ice drilling sites. I also develop conceptual models of paleoclimates.

I am working with numerical models to investigate the glacial-interglacial cyclicity during the Pleistocene (last 2 million years). A particular focus is on understanding the causes and drivers of the Mid-Pleistocene Transition (MPT), which occurred about 0.8-1.2 Ma ago and led to a change in the dominant cyclicity from 41 ka to 100 ka. For this purpose, I am using so-called conceptual models, which only rely on a few couple of parameters but have the potential to model the most important global climate characteristics. During my PhD, I plan to utilize these conceptual models to test the different hypotheses which could have caused the MPT and identify the most likely scenarios, as well as the main mathematical features controlling my model results. This project is part of the AUFRANDE International Training Program, which aims to link research in France and Australia.

I am exploring microbial communities associated with glacial rock flour and their contributions to nitrogen cycling. This ultra-fine fine rock sediment is exported from the base of glaciers and contributes nutrients to downstream ecosystems. Alongside characterizing downstream ecological impacts, studying the microbial communities and their metabolic potential will allow us to better evaluate the benefits of glacial flour as an agricultural soil amendment. To investigate this, I am collecting various glacial flour samples for metagenomic analyses to learn about their microbial communities and for geochemical analysis to examine connections to their composition. These samples will be used in further experimentation targeting relationships to plant growth and nitrogen efflux. My project is one of twelve that comprise the EU-funded IceBio doctoral network which is focused on microbial and biogeochemical processes in glacial ecosystems.

I am scientific manager of the analytical platform PANDA, scientific manager of the isotopic chemistry laboratory and member of the National CNRS Committee, section 19. I am developing research programs on stable isotope geochemistry applied to paleoclimates, ice-core analysis and the study of polar and non-polar atmospheric chemistry. A particularity of the team is to rely on mass-independent isotope fractionations of the elements O and S to probe the oxidative capacity of the atmosphere and the role of volcanism on climate. Field campaigns are regularly undertaken in polar and alpine zones to collect samples and daily monitorings of some chemical characteristics of the atmosphere. The team is continuously developing new analytical approaches in environmental chemistry.

My PhD revolves around high resolution isotopic measurements of sulphate and nitrate ions in the Illimani ice core (Bolivia). Using a new technique, I will make the first clumped isotope measurements on ice core sulphate and nitrate. This novel approach, in tandem with atmospheric chamber experiments, will provide unique information on the evolution of both the oxidative capacity of the atmosphere and NOx and SO2 emissions sources over the past 20,000 years. This PhD forms part of the ERC DOC-PAST project.

I’m a second year PhD student, in co-tutelle between EDYTEM laboratory (Environnements, Dynamiques et Territoires de Montagne, Université Savoie Mont Blanc, Chambéry) and IGE (Institut des Géosciences de l’Environnement, Univeristé Grenoble Alpes). My thesis project concerns the evaluation of the link between microbial activity and biogeochemistry of sugars in snowpacks

Thanks to the MSCA funding by the European Union, i will be continuing my PhD at IGE Grenoble where I will be working to understand the microbial dynamics at the snow and glacial interface in terms of biomass and nutrients : how it develops and propagates to the glacier thus storing the nutritional components for centuries. What type of community interaction prevails at freezing temperatures ? Which trophic levels are dominating which temporal phases of growth ? How the microbial communities are segregated and established in snow and glacial ice ? I will be using the metagenome and metatranscriptome based computational analyses to understand the features of the biotic components of the snow and glacial ice.

I am a CNRS study engineer in materials sciences / characterization, technical manager PANDA / GAS (ANalytical platform Dedicated to the Glacial Archives), manager of the Antarctic IPEV project EPICA Archive and prevention assistant of IGE.

I am engineer and my activities are related to the project OCEAN:ICE and the analytical platform PANDA. For OCEAN:ICE, I am working on an in situ water isotope measurement instrument, developed in the framework of the ANR "SWIS" and Axel Wohleber’s thesis supervised by Roberto Grilli, in view of a field measurement campaign. I will then work on the data collected during this campaign. On the PANDA platform, I participate to the analysis (CFA and IC) of ice core samples collected in the framework of the EAIIST project.

With a background in instrumentation and physics, I joined the world of environmental science at IGE. My thesis work focuses on the laboratory and field validation of a sensor for in-situ water isotope measurements. For this, I am developing test experiments to validate accuracy and reliability of the instrument’s measurements. In order to make the instrument operational, I adapt the sensor to respond to extreme field conditions. This tool has been designed to study the freshwater cycle, the interactions between the oceans and the ice-shelf and to understand the processes responsible for the melting of the latter.

I am a student in applied and instrumental physics and I am doing my work-study at the Institut des Géosciences et de l’Environnement in the ICE3 (Climate Chemistry Core) team. My research work, at the interface between experimental physics and geosciences, involves developing innovative experimental techniques, particularly physical-optical, to characterize the coupling between climate and the geochemistry of Antarctic ice. Thus, my current work within the framework of the ANR BIOCOD project concerns the development, including measurement and analysis systems, of a new direct absorption infrared laser spectroscopy instrument dedicated to the analysis of atmospheric CO2, and more specifically to its isotopes in air bubbles extracted from ice cores. This new method could then become a robust and interesting isotopic tool for identifying changes in the dynamics of the contributions of different carbon reservoirs in the past. Moreover, this technique will be faster than existing techniques, while using small amount of gas.