Geoffrey Blewitt

Geoff Blewitt is a professor at University of Nevada, Reno, where he is a founding member of the Nevada Geodetic Laboratory. He has a Ph.D. in Physics from Caltech, and is a co-author of the GIPSY software developed at NASA's Jet Propulsion Laboratory, which uses GPS data from around the globe to measure 3-D changes in Earth's shape and rotation with few millimeter accuracy within a global reference frame. His measurements of changes in Earth's shape are intimately related to sea level through global redistribution of water and ice and the resulting variations in surface pressure and gravitation. His measurements of vertical motion along coastlines are needed to address the coastal impacts of sea level change, which can often be strongly affected by coastal subsidence. He is co-investigator in two NASA Sea Level Change Team projects, (1) "Global Interconnections of Cryosphere and Solid Earth, Sea-Level Change and Ice Mass Balance", and (2) "Using Satellite Measurements to Improve Regional Estimates of the Impacts of Sea Level Change".