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OSUG - Terre Univers Environnement

Monitoring glaciers and ice sheets from satellite and airborne remote sensing data

Séminaire de Romain Millan : mardi 21 mars 2017 à 14h, salle Lliboutry

by Sandra Rome - 6 March 2017 ( maj : 29 March 2017 )

Title: Monitoring glaciers and ice sheets from satellite and airborne remote sensing data

Abstract:
Glaciers and ice sheets are integrant part of the Earth system; they interact in a complex way with the atmosphere and the oceans. Measurements of current glaciers and ice sheets mass change are important in order to assess their current contribution to sea level rise and to constrain future projections. Here we use multiple independent measurements to estimates recent ice mass change and to assess new bathymetry at the periphery of glaciers and ice sheets. We investigate recent changes in the partitioning of ice losses in the Canadian Arctic, where increased rates of surface runoff have dramatically shifted the mass balance regime. We compile new bathymetry measurements under the ice shelves of key regions of Antarctica and in the fjords of Greenland, where changes in the ice sheet velocity have led to accelerating mass losses and widespread glaciers retreat. The work provides new constraints to ice sheet models and helps improve our general understanding of the mechanisms driving current ice caps and ice sheets changes.

Authors: Romain Millan, Eric Rignot, Jérémie Mouginot, Mathieu Morlighem
Affiliation: University of California, Irvine, USA





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