- Atmospheric particles
- Ice core paleoclimatology
- Climate change
I use ice cores to study the history of the atmosphere, with a particular focus on atmospheric particles (aka particulate matter or aerosols). I am interested in changes in atmospheric particle composition and abundance during the Anthropocene, including changes in biomass burning patterns, atmospheric aerosol transport, and the ongoing influence of human activities on the geochemical record. I use experimental techniques such as single particle mass spectrometry and electron microscopy to study particles in ice cores from alpine regions and Antarctica.
I've participated in field programs including Sierra Nevada snow pack studies, Antarctic ice core drilling, and atmospheric pollution studies in the US and in post-hurricane Puerto Rico.