Project Information
Collaborative Research: IPY: POLENET-Antarctica: Investigating Links Between Geodynamics and Ice Sheets
This project constructs POLENET a network of GPS and seismic stations in West Antarctica to understand how the mass of the West Antarctic ice sheet (WAIS) changes with time. The information is ultimately used to predict sea level rise accompanying global warming and interpret climate change records. The GPS (global positioning system) stations measure vertical and horizontal movements of bedrock, while the seismic stations characterize physical properties of the ice/rock interface, lithosphere, and mantle. Combined with satellite data, this project offers a more complete picture of the ice sheet's current state, its likely change in the near future, and its overall size during the last glacial maximum. This data will also be used to infer sub-ice sheet geology and the terrestrial heat flux, critical inputs to models of glacier movement. As well, this project improves tomographic models of the earth's deep interior and core through its location in the Earth's poorly instrumented southern hemisphere.

Broader impacts of this project are varied. The work is relevant to society for improving our understanding of the impacts of global warming on sea level rise. It also supports education at the postdoctoral, graduate, and undergraduate levels, and outreach to groups underrepresented in the sciences. As an International Polar Year contribution, this project establishes a legacy of infrastructure for polar measurements. It also involves an international collaboration of twenty four countries. For more information see IPY Project #185 at NSF is supporting a complementary Arctic POLENET array being constructed in Greenland under NSF Award #0632320.
Person Role
Wilson, Terry Investigator
Bevis, Michael Co-Investigator
Anandakrishnan, Sridhar Investigator
Wiens, Douglas Co-Investigator
Aster, Richard Co-Investigator
Smalley, Robert Co-Investigator
Nyblade, Andrew Co-Investigator
Winberry, Paul Co-Investigator
Hothem, Larry Co-Investigator
Dalziel, Ian W. Co-Investigator
Huerta, Audrey D. Co-Investigator
Antarctic Earth Sciences Award # 0632322
Antarctic Glaciology Award # 0632322
Antarctic Earth Sciences Award # 0632136
AMD - DIF Record(s)
Data Management Plan
None in the Database
Product Level:
Not provided
Repository Title (link) Format(s) Status
UNAVCO University NAVSTAR Consortium (UNAVCO) None exist
IRIS Incorporated Research Institutions for Seismology (IRIS) None exist
  1. Aster, R.C. and J P Winberry (2017). Glacial seismology. Reports on Progress in Physics, 80. (doi:10.1088/1361-6633/aa8473)
  2. O'Donnell, J.P., Stuart, G.W., Brisbourne, A.M., Selway, K., Yang, Y., Nield, G.A., Whitehouse, P.L., Nyblade, A., Wiens, D., Anandakrishnan, S., Aster, R.C., Huerta, A., Wilson, T., Winberry, J.P., The uppermost mantle seismic velocity structure of West Antarctica from Rayleigh wave tomography: Insights into tectonic structure and geothermal heat flow, EPSL, 522, 219-233, 10.1016/j.epsl.2019.06.024, 2019. (doi:10.1016/j.epsl.2019.06.024)
  3. O'Donnell, J.P., Selway, K., Nyblade, A., Brazier, R., Wiens, D., Anandakrishnan, S., Aster, R.C., Huerta, A., Wilson, T., Winberry, J.P., The uppermost mantle velocity and viscosity structure of central West Antarctica, EPSL, 472, 38-49, 10.1016/j.epsl.2017.05.016, 2017. (doi:10.1016/j.epsl.2017.05.016)
  4. Emry, E. L., Nyblade, A. A., Julià, J., Anandakrishnan, S., Aster, R. C., Wiens, D. A., … Wilson, T. J. (2015). The mantle transition zone beneath West Antarctica: Seismic evidence for hydration and thermal upwellings. Geochemistry, Geophysics, Geosystems, 16(1), 40–58. (doi:10.1002/2014gc005588)
  5. Lloyd, A. J., Wiens, D. A., Nyblade, A. A., Anandakrishnan, S., Aster, R. C., Huerta, A. D., … Zhao, D. (2015). A seismic transect across West Antarctica: Evidence for mantle thermal anomalies beneath the Bentley Subglacial Trench and the Marie Byrd Land Dome. Journal of Geophysical Research: Solid Earth, 120(12), 8439–8460. (doi:10.1002/2015jb012455)
  6. Dunham, C. K., O’Donnell, J. P., Stuart, G. W., Brisbourne, A. M., Rost, S., Jordan, T. A., … Aster, R. C. (2020). A joint inversion of receiver function and Rayleigh wave phase velocity dispersion data to estimate crustal structure in West Antarctica. Geophysical Journal International, 223(3), 1644–1657. (doi:10.1093/gji/ggaa398)
  7. Hansen, S. E., Graw, J. H., Kenyon, L. M., Nyblade, A. A., Wiens, D. A., Aster, R. C., … Wilson, T. (2014). Imaging the Antarctic mantle using adaptively parameterized P-wave tomography: Evidence for heterogeneous structure beneath West Antarctica. Earth and Planetary Science Letters, 408, 66–78. (doi:10.1016/j.epsl.2014.09.043)

This project has been viewed 19 times since May 2019 (based on unique date-IP combinations)