The objective of this study is to estimate the atmospheric emissions by international merchant shipping of carbondioxide (CO2), sulphur dioxide (SO2) and nitrogen oxides (NOX) during 1 year in the Belgian part of the North Sea, including the four Belgian seaports: Antwerp, Ghent, Ostend and Zeebrugge. The estimated emissions are based on a bottom-up, activity-based methodology (Group 1), coveri…