He is also an honorary research fellow in the Department of Geography at the University of Durham, United Kingdom. Dr. Horton's research focuses on mechanisms of observed and predicted sea-level changes including climate change, earthquakes, tsunamis, and the coastal sedimentary budget. He has also examined the response of estuaries to sea level rise. Dr. Horton has worked on sea-level rise in several countries focusing on the contributions of glacial isostacy along the Atlantic coast of the United States, earthquakes and ground deformation along the West Coast, and sediment compaction in the United Kingdom. He received a B.A. in geography from the University of Liverpool and a Ph.D. in geography from the University of Durham.