I presented a poster at the at the Ecology of Soil Microorganisms conference in Prague, 2011 on the role of soil microorganisms in dominating the fate of atmospheric molecular hydrogen (H2). Recent work has linked atmospheric H2 uptake to a novel high-affinity [NiFe]-hydrogenase expressed in active Streptomyces sp. cells, and is perhaps not driven by…
I presented a poster at the 2010 American Geophysical Union General Assembly on H2 as a “mesotracer.” A rare glimpse into the chemical and dynamical evolution of the Arctic polar vortex is provided by a suite of in situ balloonborne measurements. A set of mesospheric tracers observed in the late vortex validate theoretical mesospheric chemical profiles,…
In the summer of 2010, I spent six inspiring, challenging, and chaotic weeks at the Marine Biological Laboratory Microbial Diversity Course in Woods Hole, MA. I hoped to take full advantage of the opportunity granted by course directors Steve Zinder and Dan Buckley of Cornell to plunge head on into the world of microbiology. I was…
After over a year of designing, building, and testing a custom instrument system to measure fluxes of molecular hydrogen (H2), I deployed the system to the Harvard Forest Long Term Ecological Research site in Petersham, Massachusetts (http://harvardforest.fas.harvard.edu/). With the instrument installed, I will measure hydrogen fluxes for a year to determine the seasonal dynamics of H2 cycling in…