Impacts of future land use and land cover change on mid-21st-century surface ozone air quality: distinguishing between the biogeophysical and biogeochemical effects

摘要: Abstract. Surface ozone (O3) is an important air pollutant and greenhouse gas. Land use land cover (LULC) one of the critical factors influencing ozone, in addition to anthropogenic emissions climate. LULC change can on hand affect biogeochemically , i.e., via dry deposition biogenic volatile organic compounds (VOCs). other alter regional- large-scale climate through modifying albedo evapotranspiration, which lead changes surface temperature, hydrometeorology atmospheric circulation that ultimately impact biogeophysically over local remote areas. Such biogeophysical effects are largely understudied. This study investigates individual combined biogeochemical explicitly examines pathway for how impacts pollution. A global coupled atmosphere–chemistry–land model driven by projected from present day (2000) future (2050) under RCP4.5 RCP8.5 scenarios, focusing boreal summer. Results reveal when considering only, predicted have slight up 2 ppbv maximum some areas due changes. It primarily isoprene emission counteracting each shaping ozone. In contrast, integrated effect LULC, more substantially altered 6 ppbv several regions, reflecting importance Furthermore, large these found regions without where only such The mechanism likely induces a regional response, particular formation anomalous stationary high-pressure systems, shifting moisture transport, near-surface warming middle-to-high northern latitudes summer, owing associated energy budget. temperature then substantially. We conclude influence quality both even locations significant Overlooking may cause evident underestimation