Conférence GM & ED Gaïa

Observing and modelling the interplay between hydrology and the solid Earth

Par Kristel CHANARD (IGN, IPG, Paris)

à 14h amphi 23.01

campus Triolet, Université de Montpellier

Participer à la conférence en ligne (ID de réunion : 975 3830 3154)

Freshwater scarcity, a pressing consequence of climate change, threatens human populations and ecosystems. With glaciers melting at alarming rates, rainfall becoming erratic and water evaporating faster, the stress on water resources reaches critical levels. As water demand intensifies, it becomes crucial to harness multiple observations of the rapidly changing water resources and enable evidence-based decision making to ensure sustainable water management. Modern geodesy, the study of the evolving shape of our planet, emerges as a new tool to monitor dynamic hydrological processes from space, at unprecedented spatio-temporal scales, guiding the development of theories and models to predict their course. Recent developments in hydrogeodesy now reveal variations in the gravity field and surface deformation of the Earth caused by the redistribution of water masses over timescales ranging from seasons to several decades. These signals are key to exploring the complex mechanical interactions between hydrology and the solid Earth.

 

 

 

Kristel CHANARD received a PhD in Geophysics from ENS in 2015, followed by a postdoc at the University of Lausanne. She has been a research scientist at IPGP and IGN since 2017. She studies Earth’s deformation driven by climate processes using satellite geodesy and physics-based modeling.