[MIS10-P01] A plan for studying the interaction of the solid Earth and the Antarctic ice sheet
Keywords:ice sheet, sea level rise, Glacial Isostatic Adjustment, ice sheet metling history, East Antarctica, viscoelastic structure
GIA as a keyword to investigate the interaction between the solid Earth and the ice sheet changes is an urgent and important research target not only for a practical requirement of predicting global changes but also for a more pure scientific interest to know the structures of the deep Earth's interior.
In view of these points, in addition to the several precise observations at Syowa station and surounding areas, we plan to conduct geomorphological, geological and geodetic surveys in the inland mountain areas and the coastal areas in East Antarctica, where the in-situ data for constraining GIA models are very few.
Combining these new observations with other in-site data, various satellite data and numerical modeling, we aim to estimating a precise GIA model, constructing a reliable ice melting history after LGM (the Last Glacial Maximum) and obtaining the viscoelastic structure of the Earth's interior.
To achieve the goal, we are planing to conduct the following studies;
(1) conducting glacial topographic surveys, geological surveys, gravity measurements, and GNSS measurements at the in-land areas of the East Antarctica, where very few observations were conducted so far, and reevaluating the glacial topography using the in-situ observations and recent precise DEM (Digital Elevation Model),
(2) improving the accuracies of the retreat ages of the ice sheets using the micro glacier topography from the detailed airborne photographic data obtained by unmanned aerial vehicles, the cosmogenic nuclide exposure ages of the basement bowling samples and the moraine rocks,
(3) monitoring the present day ice sheet movements and sea level changes by combining satellite data and in-situ geodetic and other observations in and around Syowa Station, and
(4) finally aiming at the quantitative reconstruction of the ice melting history over the last millions years, and the improvement of the models for predicting the future global changes.