Spatial and Temporal Variations of Atmospheric Methane and Carbon Dioxide Observed in Environment Canada’s Greenhouse Gas (GHG) Measurement Network
E. Chan, D.E.J. Worthy, M. Ishizawa and D. Chan
Environment Canada, Toronto, Ontario M3H 5T4, Canada; 416-739-4414, E-mail: email@example.com
Environment Canada conducts high quality ground-based atmospheric measurements of GHGs from coastal, interior and Arctic regions in Canada. The current network of 12 stations is strategically located to catch the regional atmospheric signals of carbon fluxes from major ecosystems over Canada and reflect the long-range transport of GHGs into and out of Canada. These measurements document the spatial and temporal distributions of GHGs in Canada, providing essential constraints to our understanding of Canada’s natural and anthropogenic sources and sinks of GHGs. An analysis of the spatial distribution of atmospheric CO2 and CH4 extent utilizing backward trajectory calculations is demonstrated. The results show that methane and carbon dioxide sources have the potential to affect regions covering several hundred kilometers. Temporally (synoptic, seasonal and inter-annual variations), atmospheric observations of CO2 and CH4 clearly provide information on controlling processes in important ecosystems such as the boreal forest and wetland regions in Canada and their possible response to changes in climate.