| Abstract Submission No. | ABS-1.3-0121 |
| Title of Abstract | Solid Earth Dynamics and the Response of Polar Ice Sheets to Sea Level Changes |
| Authors | RAVIKUMAR MUPPIDI*, Lokesh Vaska |
| Organisation | CSIR-National Geophysical Research Institute |
| Address | csir ngri Hyderabad, Telangana, India Pincode: 500007 E-mail: ravikumarmuppidi@gmail.com |
| Country | India |
| Presentation | Oral |
| Abstract | The thermal and mechanical structure of the solid Earth is fundamental in regulating how polar regions respond to ice mass changes, directly impacting the development and stability of the Antarctic and Greenland ice sheets. These ice sheets' variation affects sea level projections, but significant uncertainties remain due to limited understanding of Glacial Isostatic Adjustment (GIA) processes. Accurately quantifying GIA uplift rates, especially in Greenland and Antarctica, requires constraints on Earth's rheology, lithospheric thickness, and ice load history. Geophysical observations such as rock density, velocity, temperature, and water content support the assessment of subsurface properties, improving knowledge of Geothermal Heat Flux (GHF) and GIA. Geodetic data reveal bedrock uplift and ice dynamics, while seismic velocities indicate thermal variations: seismically slow (hotter, thinner lithosphere, lower mantle viscosity) mantle regions like southeast Greenland and West Antarctica show more rapid GIA uplift, compared to colder, thicker lithosphere in East Antarctica and northern Greenland. These structural variations ultimately influence bedrock response, ice sheet evolution, and sea level change. Our lithospheric models and effective elastic thickness results explain the present-day melting of ice sheets in Greenland and Antarctica. |
| Keywords | Lithosphere, Glacial Isostatic Adjustment,Glacial Isostatic Adjustment, Antarctica, Greenland |