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SUMMARY:Insights into the geodetic signature of continental hydrology - Kr
 istel Chanard -- IPGP\, Paris
DTSTART:20241113T140000Z
DTEND:20241113T150000Z
UID:TALK216448@talks.cam.ac.uk
CONTACT:Adriano Gualandi
DESCRIPTION:Understanding how the Earth’s shape\, gravity field and rota
 tion change in response to shifting hydrological and oceanic mass loads at
  its surface holds great potential for regional and global monitoring of o
 ur rapidly evolving water resources. Recent advances in the field of hydro
 geodesy\, have required hand-in-hand development and improvement of observ
 ational techniques and of our understanding of the solid Earth interaction
 s with surface and groundwater. The presentation will first focus on innov
 ative data-driven methods aimed at refining observations of the Earth's gr
 avity field through satellite missions like GRACE and GRACE-Follow On sate
 llite. These approaches provide unprecedented insights into spatial and te
 mporal Earth’s gravity field at timescales ranging from months to decade
 s. However\, interpreting these signals in terms of water mass redistribut
 ion presents challenges due to the inherently integrated nature of gravity
  measurements. We will explore the potential of combining measurements of 
 the Earth’s gravity field with additional geodetic measurements\, includ
 ing deformation of the solid Earth by GNSS and InSAR\, to identify contrib
 utions from the solid Earth and separate signals from various hydrological
  reservoirs such as surface waters\, aquifers or glaciers and ice sheets. 
 Moreover\, we will discuss the underlying physical processes shaping the g
 eodetic signature of continental hydrology\, providing a foundational unde
 rstanding for leveraging geodetic measurements in addressing water-related
  issues and offering crucial insights into the mechanics of solid Earth de
 formation.
LOCATION:Wolfson Lecture Theatre
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