N2O and CH4 are biogenically produced trace gases whose atmospheric concentrations are increasing. Both gases are radiatively active, contributing approximately 7% and 16% of the “greenhouse effect”. During this talk I will show variability in time and space between and within aquatic systems, investigate consumption and production processes, address the potential for change associated with environmental change and review a number of recent changes in our understanding of the marine sources and sinks of these two climate relevant gases.

 

Andy Rees has worked at PML for 34 years. Originally employed as a technician keeping gas chromatography and mass spec systems running in order to measure the fluxes of nutrients and greenhouse gases in diverse marine environments. In 2001 he gained a PhD from the University of Plymouth and now leads the nutrient biogeochemistry group at PML and manages the Atlantic Meridional Transect (annual expedition of biogeochemical observations between the UK and South Atlantic). Rees is a biogeochemist who has participated in and led research projects and oceanographic expeditions on a global scale including to Arctic and Antarctic regions. His research interests focus on biogeochemical cycling in the marine environment and on the impact of environmental change on the biological and chemical processes which control the ocean and atmospheric exchange of greenhouse gases.

Meeting ID: 950 3264 7837 

Passcode: 566640