Toti Larson received a Ph.D. from the University of New Mexico Department of Earth and Planetary Sciences in 2003 with Dr. Zachary D. Sharp. There he studied oxygen isotope chemistry of aluminum silicate 'triple point' rocks in the Sangre de Cristo Mountains of New Mexico and Mt. Moosilauke, NH. He then completed a post doctoral fellowship at The University of Western Ontario with Dr. Fred Longstaffe where he developed an in situ laser system to measure oxygen and carbon isotopes in modern deer cortical bone. Toti then worked for 7 years as a Technical Staff Member at Los Alamos National Laboratory. His projects included nuclear and chemical forensics, environmental monitoring, CO2 sequestration and enhanced oil recovery. Toti came to The University of Texas at Austin in 2012 to work in the stable isotope laboratory and develop new environmental tracer tools.

Areas of Expertise

Dr. Larson is a stable isotope geochemist specializing in novel methods of light isotope measurement that include silicate laser fluorination, compound-specific carbon isotope measurement, and gas chromatography. His current research focuses on developing tracers to probe shallow (vadose zone) and deeper CO2 sequestration and unconventional reservoirs. He integrates experimental flow through column experiments with diffusion-advection modeling to understanding the behavior of tracer compounds in a variety of substrates. He also couples light isotope fractionation with these tracer studies to understand molecular interactions during transport.

Graduate Students

Marlo R Gawey, M.S., expected 2012 (Supervisor)