Satellite Geodesy for Climate Studies
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Last News
December 2023
Back to San Francisco at the AGU 2023 Fall meeting with exciting presentations on the improvement of ocean model predictions, but also on the occurence of a 6-year cyle in the Earth's system and climate, as well as the estimation of the global ocean heat content from space geodesy!
November 2023
Starting a new research study with the CNES aiming at identifying and removing defaults in GRACE solutions using machine learning!
October 2023
New paper showing that global hydrological models underestimate slow water storage changes when compared to GRACE satellite data.
October 2023
You want to know more about the 6-year cycle? Have a look at our new paper!
August 2023
We are very excited to discuss new ideas about the occurence of a 6-year cycle in the whole Earth system in this short note!
July 2023
Congratulations to Hugo Lecomte publishing his first PhD paper on the possibility to detect signals originated from the core in GRACE data!
June 2023
Happy to contribute to the Copernicus Marine General Assembly 2023 with a presentation on the WAMBOR project.
May 2023
We are contributing to the GLAMBIE project with the submission of satellite gravimetry estimates of the mass balance of Arctic glaciers!
April 2023
In Vienna at the EGU general assembly presenting our recent results about the occurence of a 6-year cycle in the Earth's system.
March 2023
Our paper on the closure of the global ocean mass budget is now published in Ocean sciences!
January 2023
Congratulations to Olivier Goux publishing his first paper on the filtering of satellite gravimetry solutions in GJI!
December 2022
Anny Cazenave will present at the 2022 AGU Fall meeting our joint study on the detection of a 6-year cycle in the Earth system.
November 2022
Very stimulating meeting at CNES with the partners of the GRACEFUL project to increase the synergy in the various approaches to study the Earth's core and deep interior.
October 2022
We are participating to the GRACE Science Team Meeting 2022 with three talks on multidispicipinary, ocean and hydrological applications of GRACE and GRACE-FO satellite gravity missions. Have a look at our presentations about the detection of a 6-year cycle in the climate system, the analysis of the global mean ocean mass budget or the underestimation of slow changes in terrestrial water storage with global hydrological models.
October 2022
Magellium won the hybridation challenge from the CNES to develop a hybrid satellite solution merging satellite gravimetry and high-resolution satellite imagery to monitor ice-mass changes of the world's glaciers. Have a look at the 12 laureates here!
June 2022
Magellium won the WAMBOR project for the Copernicus Marine Service evolution call. WAMBOR aims at improving the observational constraints on the water mass balance in ocean reanalyses with satellite geodetic measurements. We will in particular test the sensitivity of ocean model simulations to freshwater fluxes estimated from GRACE and GRACE-FO.
May 2022
Magellium is eagerly participating to the 2022 Living Planet Symposium. I will talk on Tuesday 24th May about the non-closure of the sea level budget (on the behalf of Anne Barnoud) and about the detection of small gravity signals originated from the deep Earth's interior in GRACE and GRACE-FO measurements.
More information on this page: https://earthobservation.magellium.com/lps22/
January 2022
I have been invited to give an AGU Geodesy Webinar on January 28 about climate change, climate variability and space geodesy. More information on this website.
January 2022
Our paper on the estimation of the Earth's Energetic Imbalance from space geodetic measurements has now been accepted for publication in Earth System Science Data!
January 2022
ANU GRACE mascons solutions are out! Have a look at our papers on the inversion of the acceleration of intersatellite range rate measurements and on the benefits of irregularly shaped mascons. The ANU mascon solution can be downloaded here or viewed interactively on this website!
January 2022
Our article on the "Applications and Challenges of GRACE and GRACE Follow-On Satellite Gravimetry" has been accepted for publication in Surveys in Geophysics.
December 2021
Magellium presented its research activities in spatial geodesy at the 2021 AGU Fall Meeting, with:
October 2021
On Sunday 24th October, I was invited for the closing conference of Copernicus Days at la cité de l'espace in Toulouse. We talked about Amazonia and I discovered a great deal about the Amazonia 4.0 project aiming at preserving and restoring the forest, while developping a regional bioeconomy.
October 2021
I'm happy to say that only one year after the beginning of our activities in spatial gravimetry, Magellium contributed four talks to the GFOSTM (GRACE Follow-On Science Team Meeting) by Olivier Goux, Julia Pfeffer, Florence Marti and Anne Barnoud. The topics were as diverse as the development of mass-conserving filters, identification of climate modes, estimation of Earth's Energy Imbalance and closure of the sea level budget! Well done team!
September 2021
Our new article about the detection of climate modes in satellite gravity measurements has now been accepted for publication. Eight major climate modes, including ENSO, are responsible for a large part of the variability in the global water cycle at interannual time scales. A preprint of the paper is accessible here.
June 2021
Our article about the non-closure of the sea level budget has just been published in Geophysical Research Letters. Instrumental errors in salinity measurements explain about 40% of the gap observed between the sensors since 2016. The paper is accessible here.
April 2021
Very nice session today about the application of geodesy for climate research at the EGU General Assembly 2021. My PICO talk was about the impact of climate modes on GRACE and GRACE-FO measurements of the water mass transport. You can find here my abstract, PICO slide and support slides.
October 2020
I am presenting the GRACEFUL project at the GRACE Science Team Meeting. Check the program, our abstract and our presentation.
September 2020
Started a new position as a research Engineer at Magellium, Toulouse, France. My first 4-yr project, called GRACEFUL, aims at detecting deep Earth processes with a combination of satellite observations of the magnetic field, gravity field and Earth Rotation. This ERC project is led by Véronique Dehant, Mioara Mandea and Anny Cazenave.
November 2019
Our new paper Virtual Tide Gauges for Predicting Relative Sea Level Rise has been published online by the Journal of Geophysical Research.
July 2019
Starting a new research project with Geosciences Australia to deliver national solutions of water storage changes from GRACE and GRACE FO satellite gravity missions
January 2019
The French Institute for Research and Development (IRD) published a short story about our recent paper on the Amazon revealing groundwater storage changes with a combination of satellite data (in French): http://www.ird.fr/toute-l-actualite/actualites-scientifiques/les-eaux-souterraines-de-l-amazone-enfin-quantifiees
Late December 2018
Our new paper "The spatio-temporal variability of groundwater storage in the Amazon river Basin" has been published online in Advances in Water Resources. Check out the article by clicking here!
Mid december 2018
Full of confidence after a great AGU in Washington. Science matters! It's now time to write a new paper about the historical reconstructions of steric sea level changes. Slides of my presentation available on request!
Early december 2018 (yep, just before the AGU :-)
The ANU Sea Level website (http://sealevel.anu.edu.au) is now online, with full reconstructions of historical steric sea levels available as well as climate mode fingerprints! Check out our new data here!
June 2018
Our paper "Multi-technique assessment of the inter-annual to multidecadal variability in steric sea levels: a comparative analysis of climate mode fingerprints" has been accepted for publication in the Journal of Climate. See the accepted draft by clicking here!
May 2018
The AusPass website (http://auspass.edu.au/) is now online!
February 2018
I am now part of the AusPass team at the Research School of Earth Sciences in Canberra, Australia! Objective: Acquire, manage and distribute passive seismological data acquired in Australia since the 1980s.
December 2017
I am getting ready for the AGU, with an excellent program held in New Orleans this year! I will contribute with a talk on Tuesday, 12h05, at the session OS22A: sea level rise and coastal flooding II. On program: how to reveal the natural variability of climate in three very different kind of steric reconstructions.
August 2017
The bi-annual Australian geodesy meeting was held in Canberra this year. I met brilliant geodesists here, and heard excellent talks. I particularly enjoyed the contributions of Achraf Koulali on the seismicity in Java and Christopher Watson on the global mean sea level rise.
May 2017
Our paper "Decoding the origins of vertical land motions observed today at coasts" has been published in Geophysical Journal International. See the manuscript online by clicking here!
October 2016
It's time for me to start a new postdoc at the Australian National University. I will be working with Paul Tregoning and Anthony Purcell for the next two years on seal level changes observed over the past century.
April 2016
I presented our last paper "Contribution of vertical land motions to coastal sea level variations: a global synthesis of multisatellite altimetry, tide gauge and GPS measurements" at the European Geoscience Union General Assembly. Please find a copy of my poster here!
March 2016
Many thanks to Giorgio Spada for inviting me at the Universita degli Studi di Urbino Carlo Bo! I have a great week there working on Glacial Isostatic Adjustment issues.
February 2016
Our paper "The key role of vertical land motions in coastal sea level variations: a global synthesis of multisatellite altimetry, tide gauge and GPS measurements" has been accepted for publication in Earth and Planetary Science Letters. See the manuscript online by clicking here!
January 2016
I got a new postdoctoral position at Université Lyon 1 (France). I'm now part of the AUGURY team and will work on the contribution of global geodynamics to present day deformation in coastal areas.
December 2015
I had a great time at the AGU fall meeting in San Francisco, California. Many people came to see my poster presenting my global geodetic database (ALTIGAPS). Thank you all.
March 2015
Our chapter "Radar altimetry for ungauged basins" is accepted for publication in Inland Water Altimetry, Ed: Benveniste, J., Vignudelli, S., Kostianoy, A., Springer, 500p
March 2014
My paper "Low-water maps of the groundwater table in the central Amazon by satellite altimetry" is published in Geophysical Research Letters.
September 2013
I get funding from the CNES for a 2-year postdoctoral project, which aims to better understand the geodynamic and climate components of the recent coastline mobility.
April 2013
My paper "Evaluating surface and subsurface water storage variations at small time and space scales from relative gravity measurements in semiarid Niger" is published in Water Ressources Research.
September 2012
I get a part-time position as research and teaching assistant at ENS Lyon.
January 2012
I start a postdoctoral fellowship at the laboratory Geosciences Environnement Toulouse.
September 2011
I got my PhD in Geophysics at the university of Strasbourg.
Back to San Francisco at the AGU 2023 Fall meeting with exciting presentations on the improvement of ocean model predictions, but also on the occurence of a 6-year cyle in the Earth's system and climate, as well as the estimation of the global ocean heat content from space geodesy!
November 2023
Starting a new research study with the CNES aiming at identifying and removing defaults in GRACE solutions using machine learning!
October 2023
New paper showing that global hydrological models underestimate slow water storage changes when compared to GRACE satellite data.
October 2023
You want to know more about the 6-year cycle? Have a look at our new paper!
August 2023
We are very excited to discuss new ideas about the occurence of a 6-year cycle in the whole Earth system in this short note!
July 2023
Congratulations to Hugo Lecomte publishing his first PhD paper on the possibility to detect signals originated from the core in GRACE data!
June 2023
Happy to contribute to the Copernicus Marine General Assembly 2023 with a presentation on the WAMBOR project.
May 2023
We are contributing to the GLAMBIE project with the submission of satellite gravimetry estimates of the mass balance of Arctic glaciers!
April 2023
In Vienna at the EGU general assembly presenting our recent results about the occurence of a 6-year cycle in the Earth's system.
March 2023
Our paper on the closure of the global ocean mass budget is now published in Ocean sciences!
January 2023
Congratulations to Olivier Goux publishing his first paper on the filtering of satellite gravimetry solutions in GJI!
December 2022
Anny Cazenave will present at the 2022 AGU Fall meeting our joint study on the detection of a 6-year cycle in the Earth system.
November 2022
Very stimulating meeting at CNES with the partners of the GRACEFUL project to increase the synergy in the various approaches to study the Earth's core and deep interior.
October 2022
We are participating to the GRACE Science Team Meeting 2022 with three talks on multidispicipinary, ocean and hydrological applications of GRACE and GRACE-FO satellite gravity missions. Have a look at our presentations about the detection of a 6-year cycle in the climate system, the analysis of the global mean ocean mass budget or the underestimation of slow changes in terrestrial water storage with global hydrological models.
October 2022
Magellium won the hybridation challenge from the CNES to develop a hybrid satellite solution merging satellite gravimetry and high-resolution satellite imagery to monitor ice-mass changes of the world's glaciers. Have a look at the 12 laureates here!
June 2022
Magellium won the WAMBOR project for the Copernicus Marine Service evolution call. WAMBOR aims at improving the observational constraints on the water mass balance in ocean reanalyses with satellite geodetic measurements. We will in particular test the sensitivity of ocean model simulations to freshwater fluxes estimated from GRACE and GRACE-FO.
May 2022
Magellium is eagerly participating to the 2022 Living Planet Symposium. I will talk on Tuesday 24th May about the non-closure of the sea level budget (on the behalf of Anne Barnoud) and about the detection of small gravity signals originated from the deep Earth's interior in GRACE and GRACE-FO measurements.
More information on this page: https://earthobservation.magellium.com/lps22/
January 2022
I have been invited to give an AGU Geodesy Webinar on January 28 about climate change, climate variability and space geodesy. More information on this website.
January 2022
Our paper on the estimation of the Earth's Energetic Imbalance from space geodetic measurements has now been accepted for publication in Earth System Science Data!
January 2022
ANU GRACE mascons solutions are out! Have a look at our papers on the inversion of the acceleration of intersatellite range rate measurements and on the benefits of irregularly shaped mascons. The ANU mascon solution can be downloaded here or viewed interactively on this website!
January 2022
Our article on the "Applications and Challenges of GRACE and GRACE Follow-On Satellite Gravimetry" has been accepted for publication in Surveys in Geophysics.
December 2021
Magellium presented its research activities in spatial geodesy at the 2021 AGU Fall Meeting, with:
- one oral presentation by Florence Marti about the estimation of the Earth's Energy Imbalance from satellite data,
- one e-lightning presentation by Anne Barnoud about the non-closure of the sea level budget, and,
- two oral presentations by myself about the analysis of the temporal variations of the gravity field measured by GRACE and GRACE-FO and the detection of climate mode fingerprints in GRACE and GRACE-FO measurements.
October 2021
On Sunday 24th October, I was invited for the closing conference of Copernicus Days at la cité de l'espace in Toulouse. We talked about Amazonia and I discovered a great deal about the Amazonia 4.0 project aiming at preserving and restoring the forest, while developping a regional bioeconomy.
October 2021
I'm happy to say that only one year after the beginning of our activities in spatial gravimetry, Magellium contributed four talks to the GFOSTM (GRACE Follow-On Science Team Meeting) by Olivier Goux, Julia Pfeffer, Florence Marti and Anne Barnoud. The topics were as diverse as the development of mass-conserving filters, identification of climate modes, estimation of Earth's Energy Imbalance and closure of the sea level budget! Well done team!
September 2021
Our new article about the detection of climate modes in satellite gravity measurements has now been accepted for publication. Eight major climate modes, including ENSO, are responsible for a large part of the variability in the global water cycle at interannual time scales. A preprint of the paper is accessible here.
June 2021
Our article about the non-closure of the sea level budget has just been published in Geophysical Research Letters. Instrumental errors in salinity measurements explain about 40% of the gap observed between the sensors since 2016. The paper is accessible here.
April 2021
Very nice session today about the application of geodesy for climate research at the EGU General Assembly 2021. My PICO talk was about the impact of climate modes on GRACE and GRACE-FO measurements of the water mass transport. You can find here my abstract, PICO slide and support slides.
October 2020
I am presenting the GRACEFUL project at the GRACE Science Team Meeting. Check the program, our abstract and our presentation.
September 2020
Started a new position as a research Engineer at Magellium, Toulouse, France. My first 4-yr project, called GRACEFUL, aims at detecting deep Earth processes with a combination of satellite observations of the magnetic field, gravity field and Earth Rotation. This ERC project is led by Véronique Dehant, Mioara Mandea and Anny Cazenave.
November 2019
Our new paper Virtual Tide Gauges for Predicting Relative Sea Level Rise has been published online by the Journal of Geophysical Research.
July 2019
Starting a new research project with Geosciences Australia to deliver national solutions of water storage changes from GRACE and GRACE FO satellite gravity missions
January 2019
The French Institute for Research and Development (IRD) published a short story about our recent paper on the Amazon revealing groundwater storage changes with a combination of satellite data (in French): http://www.ird.fr/toute-l-actualite/actualites-scientifiques/les-eaux-souterraines-de-l-amazone-enfin-quantifiees
Late December 2018
Our new paper "The spatio-temporal variability of groundwater storage in the Amazon river Basin" has been published online in Advances in Water Resources. Check out the article by clicking here!
Mid december 2018
Full of confidence after a great AGU in Washington. Science matters! It's now time to write a new paper about the historical reconstructions of steric sea level changes. Slides of my presentation available on request!
Early december 2018 (yep, just before the AGU :-)
The ANU Sea Level website (http://sealevel.anu.edu.au) is now online, with full reconstructions of historical steric sea levels available as well as climate mode fingerprints! Check out our new data here!
June 2018
Our paper "Multi-technique assessment of the inter-annual to multidecadal variability in steric sea levels: a comparative analysis of climate mode fingerprints" has been accepted for publication in the Journal of Climate. See the accepted draft by clicking here!
May 2018
The AusPass website (http://auspass.edu.au/) is now online!
February 2018
I am now part of the AusPass team at the Research School of Earth Sciences in Canberra, Australia! Objective: Acquire, manage and distribute passive seismological data acquired in Australia since the 1980s.
December 2017
I am getting ready for the AGU, with an excellent program held in New Orleans this year! I will contribute with a talk on Tuesday, 12h05, at the session OS22A: sea level rise and coastal flooding II. On program: how to reveal the natural variability of climate in three very different kind of steric reconstructions.
August 2017
The bi-annual Australian geodesy meeting was held in Canberra this year. I met brilliant geodesists here, and heard excellent talks. I particularly enjoyed the contributions of Achraf Koulali on the seismicity in Java and Christopher Watson on the global mean sea level rise.
May 2017
Our paper "Decoding the origins of vertical land motions observed today at coasts" has been published in Geophysical Journal International. See the manuscript online by clicking here!
October 2016
It's time for me to start a new postdoc at the Australian National University. I will be working with Paul Tregoning and Anthony Purcell for the next two years on seal level changes observed over the past century.
April 2016
I presented our last paper "Contribution of vertical land motions to coastal sea level variations: a global synthesis of multisatellite altimetry, tide gauge and GPS measurements" at the European Geoscience Union General Assembly. Please find a copy of my poster here!
March 2016
Many thanks to Giorgio Spada for inviting me at the Universita degli Studi di Urbino Carlo Bo! I have a great week there working on Glacial Isostatic Adjustment issues.
February 2016
Our paper "The key role of vertical land motions in coastal sea level variations: a global synthesis of multisatellite altimetry, tide gauge and GPS measurements" has been accepted for publication in Earth and Planetary Science Letters. See the manuscript online by clicking here!
January 2016
I got a new postdoctoral position at Université Lyon 1 (France). I'm now part of the AUGURY team and will work on the contribution of global geodynamics to present day deformation in coastal areas.
December 2015
I had a great time at the AGU fall meeting in San Francisco, California. Many people came to see my poster presenting my global geodetic database (ALTIGAPS). Thank you all.
March 2015
Our chapter "Radar altimetry for ungauged basins" is accepted for publication in Inland Water Altimetry, Ed: Benveniste, J., Vignudelli, S., Kostianoy, A., Springer, 500p
March 2014
My paper "Low-water maps of the groundwater table in the central Amazon by satellite altimetry" is published in Geophysical Research Letters.
September 2013
I get funding from the CNES for a 2-year postdoctoral project, which aims to better understand the geodynamic and climate components of the recent coastline mobility.
April 2013
My paper "Evaluating surface and subsurface water storage variations at small time and space scales from relative gravity measurements in semiarid Niger" is published in Water Ressources Research.
September 2012
I get a part-time position as research and teaching assistant at ENS Lyon.
January 2012
I start a postdoctoral fellowship at the laboratory Geosciences Environnement Toulouse.
September 2011
I got my PhD in Geophysics at the university of Strasbourg.