Interactive comment on “Responses of surface ozone air quality to anthropogenic nitrogen deposition in the Northern Hemisphere” by Yuanhong Zhao et al

Comment: This manuscript presents a modeling study on the effects of anthropogenic nitrogen deposition on ozone pollution through surface-atmosphere exchanges. The Authors combine GEOS-Chem with CLM to produce an interesting, smart modeling experiment to study several processes (e.g. soil NOx, biogenic VOC, LAI, dry deposition velocity, etc) that affect surface ozone. They find that enhance atmospheric N deposition increases surface ozone by changes in biogenic VOC emissions and dry deposition velocities. Enhanced atmospheric N deposition also increases soil NOx emissions, but the effect on surface ozone is more scattered. The resulted