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SCIENTIFIC INTERESTS

I am passionate about phenomena related to atmospheric physics, polar glaciers and powerful tools to study these physical processes such as numerical modelling and machine learning.

CURRENTLY

Postdoctoral researcher at the DLR Institute for Atmospheric Physics, Weßling (close to Munich), working on machine learning based automated parameter tuning of global climate models with satellite data, in Prof. Veronika Eyring’s group. This position is funded by the ERC Synergy Grant USMILE.

WORK EXPERIENCES

PhD in Mechanical Modelling of the Source of Glacial Earthquakes in Polar Region

Octobre 2017 - June 2021
Affiliations : Seismology team of IPGP, Centre des Matériaux of Mines ParisTech, PIMM laboratory in ENSAM.

Evaluating glacier mass loss is a current concern to understand the rapid evolution of ice caps related to climate change. Iceberg calving is responsible for an important part of mass loss occurring at the front of marine-terminating glaciers in Greenland. Some just-calved thin icebergs are unstable : during capsize, a force is applied to the terminus and is transmitted to the solid earth. Therefore, a long-period (20s- 100s) seism is generated and seismic signal can be recorded by local and global stations. The emitted seismicity contains precious information about the source mechanisms involved during the calving process.

A versatile mechanical modelling of iceberg capsize has been developed by A. Sergeant et al. . Seismic signals provides constraints on the model and enables the calculation of the iceberg volume and its source dynamics. This model has been first tested on two particular events at the Helheim glacier, Greenland (25 July 2013 at 03:13 UTC and 31 July 2013 at 19:31 UTC) and the results are consistent with the iceberg volume measured separately using images available for this event. Following the work of Amandine Sergeant, a first objective of this PhD is the development and validation of the mechanical model (1) with the validation of the modelling of interaction between the iceberg and the surrounding ocean and (2) with the extension of the modelling to the whole system which account for frictional force between the glacier and the bedrock. A second objective of the PhD is to constrain the mechanical model with seismic signals from events of the last twenty years to evaluate Greenland glacier’s mass loss by icebergs capsize and calving.

• Analysis of glacial earthquakes and inversion of the source force in obspy and Fortran 90: estimating ice losses due to iceberg capsize
• Modelling iceberg capsize in free ocean: validation and improvement of a semi-analytical model in Python
• Hydrodynamic effects during capsize using CFD simulations: collaboration with LHEEA, Centrale Nantes
• Improvement and validation of a finite element model (Zset) for a viscous glacier with various basal friction laws
• Multiparameter analysis of the response of a tide-water glacierto the capsize of an iceberg: glacier model constrained with GPS data
• Helheim glacier response to iceberg capsize: collaboration with AWI, Bremerhaven

PhD Advisors : Anne Mangeney http://www.ipgp.fr/~mangeney/, Olivier Castelnau https://pimm.artsetmetiers.fr/user/54, Vladislav Yastrebov http://www.yastrebov.fr/.

Research internship

Numerical stability analysis of a flexible beam in a confined fluid March - August 2017 | Master year 2
Meudon, France, Onera Aerospace lab, Aerodynamics, Aeroelasticity, Acoustics Department

• Fluid-Structure interaction modelling, simulations with FreeFem++ run on a cluster
• Stability analysis of a flexible beam in a confined fluid. Possible application to oscillations of pipes or plants in water

Engineering internship

Analysis of marine vessels stability
April - August 2016 | Gap year
Leiden, Netherlands, Herema Marine Contractor, Marine Engineering Department

• Static and dynamic stability analysis of vessels for heavy lifts installations in matlab and company software
• Anchor positions, ballasting calculations, analysis of the vessels stability under various sea states conditions, writing of internal and external reports

Research internship

Sensitivity analysis on a database of catenary geometry and current quality
October 2015 - March 2016 | Gap year
Paris, France, SNCF Railway company, Direction Innovation Research, Mechanical Systems and Interaction

• Processing a database of raw field data and statistical analysis of the geometry and physical parameters of the pantograph-catenary system calculation of Sobol indices in MATLAB
• Improvement of the maintenance standards ofrailway electric power supply

Research internship

Experimental study of thermo-acoustic instabilities
May - July 2015 | Master year 1
Bombay, India, Aerospace Engineering Department, India Institute of Technology Bombay

• Experimental study of thermo-acoustic instabilities in a Rijke tube for improvement of combustion performances
• Processing the laboratory data: Influence of gas burner position, air-fuel mix and flow rate, on induced perturbations

PUBLICATIONS

• A. Sergeant, A. Mangeney, V. A. Yastrebov, F. Walter, J.-P. Montagner, O. Castelnau, E. Stutzmann, P. Bonnet, V. J.-L. Ralaiarisoa, S. Bevan, A. Luckman, Monitoring Greenland ice-sheet buoyancy-driven calving discharge using glacial earthquakes, Annals of Glaciology, 60(000), 75–95, 2019 https://doi.org/10.1017/aog.2019.7.

• P. Bonnet, V.A. Yastrebov, P. Queutey, A. Leroyer, A. Mangeney, O. Castelnau, A. Sergeant, E. Stutzmann, J-P Montagner, Modelling iceberg capsize in the open ocean, GJI, 2020, https://doi.org/10.1093/gji/ggaa353

• P. Bonnet, V.A. Yastrebov, A. Mangeney, O. Castelnau, P. Queutey, A. Leroyer, A. Sergeant, E. Stutzmann, J-P Montagner, Modelling the dynamics of iceberg - glacier - bedrock, in preparation

EDUCATION

Master of Science

Modelling and Simulation in Structural Mechanics and Coupled Systems
September 2016 - March 2017, with Honours
ENS Paris-Saclay, ENSTA Paris, Centrale Supelec, top 5 French Uni

• Model reduction
• Fluid-structure interactions
• Numerical error estimators
• Computational fluid dynamics
• Statistics and Probabilities

Master of Science

Applied Mathematics, Fluid and Solid mechanics
September 2013 - March 2017
ENSTA Paris, top 10 French Uni

• Signal processing
• Compressible and incompressible fluid dynamics
• Experimental fluid dynamics
• Numerical methods
• Turbulence

Bachelor of Science

Intensive Science program, pre-requisite for French Uni
September 2010 - July 2013
Mathematics and Physics (PCSI-PSI*) in Lycée Condorcet, Paris

High School Diploma

Major in mathematics and life and earth sciences
Sep. 2007 - June 2010
with Honours
Lycée Louis le Grand, Paris, Prestigious high school with competitive admission

DOCTORAL TRAINING

Lectures

-Earthquakes dynamics, IPG Paris 2017 -Pedagogical training, IPG Paris 2017 -Ocean, Atmosphere, Climate ENS Paris 2018 -Contact mechanics, Mines Paris 2018 -Time-dependant seismology, TIDES-cost Prague 2018 -Sun, Northern Lights, UNIS Svalbard 2019

Glaciology Field Course

UNIS, Svalbard, Norway
5 weeks in February - March 2019
Doctoral course AG-825 in UNIS, Longyearbyen
Lectures: Glaciology, Thermalregimes, Remote sensing, QGIS Tutorial
8 days of field work: GPR, Ice Coring

Living-Faults Field Course

Greece
8 days in May 2018
Doctoral field course, IPGP
Analysis of the Corinth region tectonic activity, lithospheric deformation, and seismic history

Oceanographic Campaign

Mediterranean Sea
10 days in September 2017
MOOSE-GE campaign on IFREMER Atalante ship, LOCEAN
Monitoring the impact of climate change on hydrology and biogeochemical cycles in the northwestern Mediterranean Sea

CONFERENCES AND CONGRESS

• Talk: EGU General Assembly 2021, online
• Seminar: Seismology team, IPGP January 2020 Paris, France
• Seminar: Mechanical simulation team, Mines ParisTech November 2020 Online, France
• Poster: AGU Fall Meeting 2019, Washington, USA, poster presented by Olivier Castelnau
• Talk: CFM French Mechanics Congress, 2019, Brest, France
• Poster: CDD PhD student conference, doctoral school STEP’UP, 2019, Paris
• Talk: EGU General Assembly 2019, Vienna, Austria, talk presented by A. Mangeney
• Talk: AGU Fall Meeting 2018, Washington, USA
• Talk: TIDES Advance training school in environmental seismology, 2018, Prague, Czech Republic,
• Talk: POLAR 2018, Davos, Switzerland, SCAR/IASC Open Science Conference
• Poster: CDD PhD student conference, doctoral school STEP’UP, 2018, Paris : Price for the best poster

AWARDS & GRANTS

• 2018 Best poster award - PhD Student Conference, IPGP, March 2018
• 2017-2020 Doctoral Grant from DGA and STEP’UP Doctoral school
• 2010 National Mathematical Competition, rank 59/2711

SCIENTIFIC TOOLS

• Programming languages : Python (jupyter-notebook), MATLAB, C++, Fortran 90
• Operating systems : Linux shell, Microsoft Windows
• Documents and presentations editor : LATEX , Microsoft Office
• Other : git, QGIS, Inkscape

TEACHING

Graduate-students Mechanics tutorial

Material Resistance and Fatigue Failure
January 2018 - March 2019
80 hours of teaching in ENSAM Engineering school, Paris

Undergraduate Students oral examinations

Theoretical and applied physics
September 2014 - June 2015
44 hours of teaching in intensive science program in Condorcet School, Paris

High school students private lessons

Mathematics and Physics
October 2013 - June 2014
40 hours of tutoring to high school students in the region of Paris

SCIENTIFIC EVENTS AND OUTREACH

• Climate Change Communication : facilitator of 10 Climate Fresk 3-hours workshops (2020-2022)
• Scientific instructor : for the Girls on Ice expedition on the Findelen glacier, Switzerland (one week in 2021)
• PhD and Postdocs delegate for the Seismology team of IPGP : co-organisation of seminars in Paris and in Normandy (2018-2020)
• Moderator of a Doctoral School Seminar on Ecology in Academia : with Prof. Masson-Delmotte, Prof. Capet and Dr. Sevestre, online (2020)
• Outreach in Earth and Space Seismology : at the Fête de la Science, IPGP and for the Landing of the Insight mission, Cité des Sciences, Paris (2018)
• Outreach in Glaciology : webinar for APECS-France online (2020), article for children on Glaciology, in Les Romans, Je lis déjà, (Jan 2021)
• Earth and Climate Sciences Poetry : Festival des Idées, Outreach event for Academia, IPGP, (2017 and 2019)

LANGUAGES

• French : native speaker
• English : proficient, 5 years in London as a child
• German and Spanish : intermediate
• Japanese : basics

VOLUNTEERING AND HOBBIES

• Red Cross volunteer : marauding in a Parisian district, organising a choir to raise funds for the local unit (2018-2020)
• Scouts volunteer, group leader : pedagogical games, visits of a permaculture farm (2021-2023)
• Arts and sports : 18 years of ballet and contemporary dance, canoe instructor in Hakuba Lyon Adventure Japan (2014), piano, choir, ukulélé, hiking, running, climbing, road bike, tennis