Mark is a Research Scientist at the Center for Space Research. He uses geophysical models of Earth’s deformation to understand and predict observations of crustal motion, gravity variations and sea level changes. Ongoing mantle flow due to the last glacial cycle and changing glaciers, ice sheets and hydrological water storage all affect measurements made by tide gauges, satellite altimetry, and gravity missions differently. Appreciating these differences can aid in the interpretation and attribution of seemingly disparate observations. In addition, he seeks to appreciate how data processing choices impact comparisons to the geophysical models.

Mark received degrees in physics from Grinnell College (B.A., 1992) and the University of Colorado, Boulder (M.S., 1996; Ph.D., 1999). After a post-doctoral fellowship at the University of Toronto, he has also held positions at the Smithsonian Astrophysical Observatory in Cambridge, Massachusetts, and the National Oceanography Center in Liverpool, U.K.