Changing summer basal traction of the Greenland Ice Sheet at high temporal resolution using inversion of GPS-derived surface speed

Matthew J Hoffman, Los Alamos National Laboratory, Fluid Dynamics and Solid Mechanics, Los Alamos, NM, United States, Mauro Perego, Sandia National Laboratories, Albuquerque, United States, Lauren C Andrews, NASA Goddard Space Flight Center, Global Modeling & Assimilation Office, Greenbelt, MD, United States, Tom Neumann, NASA Goddard Space Flight Ctr., Greenbelt, United States and Stephen F Price, Los Alamos National Laboratory, Fluid Dynamics and Solid Mechanics, Los Alamos, United States