Charlotte Gaugne Gouranton

GD Geodynamics

The 2025 Outstanding Student and PhD candidate Presentation (OSPP) Award is awarded to Charlotte Gaugne Gouranton for the poster/PICO entitled:

GRACE observations of rapid mass variations at the core-mantle boundary during deep mantle phase transitions in interaction with core flow (Gaugne Gouranton, C.; Panet, I.; Mandea, M.; Greff, M.; Rosat, S.)

Click here to download the poster/PICO file.

Charlotte Gaugne Gouranton is a PhD student at the Institut de Physique du Globe de Paris (IPGP), under the supervision of Isabelle Panet (IPGP / IGN) and Mioara Mandea (CNES). Her research interests focus on the interaction between the topography of the core–mantle boundary (CMB) and core flows, using satellite gravity and geomagnetic data.

At the EGU25, she presented evidence of an anomalous gravity signal detected in the GRACE data for the epoch 2007, likely originating from the deep Earth and occurring simultaneously with a geomagnetic jerk. A novel mechanism is proposed to explain this signal, impacting the CMB topography. To investigate a possible link with the 2007 geomagnetic jerk, she designed a model of variable CMB topography and studied its impact on core flows and the geomagnetic field.