Michael T. Hren
Ph.D. Stanford, Assistant Professor
Office: Beach Hall 232
Research Interests: Stable isotopic analysis of organic and inorganic materials.Present research projects include work on long-term changes in atmospheric CO2, isotopic tracing of organic molecular biomarkers, isotopic fractionation during biosynthesis of cell components and degradation in sediments, and identification and stable isotopic analysis of biomarkers in ancient sediments.
Ph.D. in Organic Chemistry, University of East Anglia
Office: Beach Hall 227
Research Interests: The use of biomarkers to study modern and ancient ecosystems. Geo-locating biological materials using stable isotopes, radiogenic isotopes and trace elements.The application of geochemical methods to ecological, archaeological and forensic investigations.
Office: Chemistry R-416
Research Interests: Using stable isotope forensics to identify isotopic variations in organic molecular biomarkers, including n-alkanes and polycyclic aromatic hydrocarbons (PAH’s), for use in tracing environmental changes over time and space
Office: Chemistry R-416
Research Interests: My research is focused on understanding how the process of burial diagenesis effects the distribution of organic molecular compounds and their carbon and hydrogen isotope composition. This information is critical to interpreting organic molecular records in sedimentary archives and has direct relationships to studies of petroleum geochemistry. Primary research tools involve compound-specific stable isotopes, GC-MS, LC-MS, and NMR.
Research Interests: I am interested in how climate effected human behavior in the past. Currently, I am investigating the role climate variability played in the transition between the Middle and Upper Paleolithic, the time period during which Neanderthals went extinct and modern humans expanded out of Africa to permanently inhabit other regions of Eurasia for the first time.
Research Interests: Carbon and hydrogen isotopes of higher plants provide a novel record of biologic and environmental changes over geological time. However, the plant-specific differences in carbon and hydrogen isotope discrimination provides a challenge to interpreting ancient sedimentary records. My research is focused on understanding the modern controls of isotope discrimination in terrestrial plants in widely varying ecosystem types. This data is critical to application of organic molecular proxies for interpreting information preserved in these markers.
Research Interests: The late Paleozoic Ice Age represents a period of widespread glacial/interglacial transitions in the Late Carboniferous, during which time massive quantities of organic biomass were preserved in the sedimentary record. This time period provides an opportunity for evaluating how global biogeochemical systems feedback to the climate system. My research is focused on understanding how hydrologic, ecosystem, and biologic systems respond to changing CO2 during glacial/interglacial cycles. This work is focused on using organic molecular biomarkers to evaluate these changes in the Illinois Basin and New Mexico.
Geoscience, PhD candidate
Office: Beach Hall
Chemistry, PhD candidate
Dave Auerbach (Yale)
Katharine Loughney (University of Michigan)
Tim Gallagher (University of Michigan)
John Richey (UC Davis)
Galen Griggs (UC Davis)
M.S. (Geoscience) 2015
Thesis Title: Climatic and Hydrological Change in Montana during the Middle Miocene Climatic Optimum
B.S. with Honors (Chemistry) 2014
Currently pursuing a Ph.D. in Physical Chemistry at the Indiana University
Thesis: "Climate and precipitation patterns in NE Spain during the past 65 Million years: A compound-specific stable isotope record"
Awarded Roland Ward Thesis Award for outstanding senior thesis in Chemistry