Gallery

Sampling the air of Cueva de Villa Luz, a sulfidic cave. I am wearing a gas mask to protect myself from hydrogen sulfide in the air.
Posing for a group photo after a day of methane sampling in Rondonia, Brazil.
A group photo in Brazil. We are under a tent we pitched to protect our instruments in a down pour.
On the left is the Gasmet which is monitoring methane concentations from a flux chamber in real time. On the right are discrete isotope sampling vials.
Sampling wetland waters in Brazil for methane concentration and stable isotopic composition.
Educating high school students on gas sampling in the arctic.
Field work in a cave in Southern Indiana. I am jotting notes at the beginning of the sampling trip.