Modeling the Synoptic Atmospheric Interaction with Anthropogenic and Biospheric CO2 Emissions
D. Chan, M. Ishizawa and D. Worthy
Environment Canada, Toronto, Ontario M3H 5T4, Canada; 416-739-4852, E-mail: email@example.com
CO2 concentration measurements at continental sites typically show strong synoptic variability. Figure 1 shows the CO2 concentration time series at the various sites in Canada. There are significant differences in the synoptic variability at these sites. In this study we used a dynamic atmospheric model Global Environmental Multiscale (GEM) with variable horizontal resolution (with minimum delta x of ~15 km) to examine the atmospheric synoptic interaction with the regional anthropogenic and biospheric CO2 fluxes. The results (Figure 2) show the atmospheric transport varies at these sites and the interaction of atmospheric transport and surface CO2 emissions (all sources) leads to different synoptic variability at different sites. Furthermore, the atmospheric interaction with anthropogenic emissions is distinct from the interaction with biospheric emissions, leading to different synoptic characteristics in the CO2 concentrations. Thus the synoptic CO2 concentration characteristics at a site contain information on the regional emission. The model and observations can be used to evaluate different emission estimates.