Simulation of contribution of continental anthropogenic sources to variations in the CO2 concentration during winter period on Hateruma Island

Data of continuous CO2 observations in the zone affected by pollutants emitted on the territory of China are analyzed using the method for simulating the CO2 transport with the help of a combination of grid based and Lagrangian particle dispersion models of atmospheric pollutant transport, taking into account the data on surface fluxes of carbon dioxide of anthropogenic, biospheric, and oceanic origins. The results of the model calculations are compared with observations at the Hateruma station, Japan, and demonstrated good correspondence. We analyzed how emissions from pollution sources located on the territory of China affect the simulated time series. Calculations are performed with and without accounting for emissions on the territory of China; they showed that anthropogenic emissions on the territory of China are the main contributors to CO2 variations at the observation site during winter period. The fact that regional anthropogenic emissions predominate in the observed signal indicates that the data from the Hateruma station can be effectively used for transport simulation in the region and for solution of inverse problems on interannual variations in anthropogenic emissions of CO2 and other gases.