Spatiotemporal variations in urban CO flux with land-use types in Seoul.

Background: Cities are a major source of atmospheric CO; however, understanding the surface CO exchange processes that determine the net CO flux emitted from each city is challenging owing to the high heterogeneity of urban land use. Therefore, this study investigates the spatiotemporal variations of urban CO flux over the Seoul Capital Area, South Korea from 2017 to 2018, using CO flux measurements at nine sites with different urban land-use types (baseline, residential, old town residential, commercial, and vegetation areas).

Results: Annual CO flux significantly varied from 1.