Methane and nitrous oxide are potent greenhouse gases, with variable and poorly quantified oceanic sources. This research project will include extensive field based measurements of methane and nitrous oxide concentrations in the Subarctic Pacific Ocean and in the Canadian Arctic Archipelago, and experimental measurements of production / consumption rates using isotope-labelling experiments. The project involved close collaboration with Dr. Steven Hallam (UBC Microbiology Dept.).
Graduate Research Opportunities
This page lists only graduate student research opportunities. Faculty, staff, postdoctoral fellow, and research associate positions are posted at the job opportunities page.
The distribution and cycling of methane and nitrous oxide in oceanic oxygen minimum zones
Probing the oceanic cycle of Dimethylsulfide
Dimethylsulfide (DMS) is a climate-active gas, which has been implicated as an important control on the atmospheric radiative balance. This gas, along with several related sulfur compounds, is cycled rapidly through the marine food web. The complexity of the marine DMS cycle has thus far made it challenging to understand the controls on the oceanic production of this gas. Using novel, sea-going mass spectrometric methods, we are currently examining the spatial and temporal distribution of DMS concentrations in the NE Subarctic Pacific, and in coastal Antarctic waters, and we are developing isotope labelling experiments to quantify the rates of DMS production and consumption through various metabolic pathways. This project aims to continue the development and implementation of these methods to gain a better mechanistic understanding of the oceanic DMS cycle.