Interests: Paleoclimatology, Paleoaltimetry, Organic Geochemistry, Isotope Geochemistry

Current Research Projects:
*Biological and environmental controls on the hydrogen isotopic composition of organic molecules

*Paleoaltimetry of the Tibetan Plateau

*Tropical South American climate since the Last Glacial Maximum

*Holocene and Pleistocene variability of the equatorial Pacific Ocean and the El Niño-Southern Oscillation

*Holocene Indian summer monsoon variability reconstructed from decadally-resolved Tibetan lake sediments

*Alkenone-based records of atmospheric CO2 concentrations

*Frictional heating on faults evaluated with the thermal alteration of organic molecules

*Neogene expansion of C4 grasslands in India, Africa and North America

*picoCSIA - New instrumentation for molecular isotopic analyses on picomolar quantitities of carbon

Division of Biology and Paleo Environment
Geoscience Building, Room 210
Lamont-Doherty Earth Observatory of Columbia University
61 Route 9W
Palisades, NY 10964, USA
phone: (845) 365-8400 (office)

News Stories, Blogs and Videos:
Slideshow of Lamont Summer Internship Program 2011
Climate Record Suggests Drier Times for Pacific Northwest
Blog about oceanographic research cruise to the Line Islands
What do dead plants tell us about earthquakes? (Lamont Public Lecture)
Biomarkers Heat Up During Earthquakes: New Geological Evidence of Earthquake Slip in the Rock Record (Lamont Colloquium Lecture)