Climate-chemistry interactions in the urban atmosphere

Abstract

Processes and climate-chemical interactions determine the composition of the atmosphere. A large number of gases and particles are chemically active in the atmosphers and are also active climate compounds like ozone (O3), methane (CH4), sulfate and organic particles. Man induced impacts on chemistry and climate is a two way process. Chemistry is affected by climate: Changes in the solar input, dynamics, temperatures, the hydrological cycle, atmospheric stability, deposition on the surface of the Earth, biosphere-atmosphere interaction. Climate is affected by the emission of ozone, sulfate and secondary organic particle precursors, and on methane, sulfate and primary organic particle emissions and on chemical processes in the atmosphere. Future climate-chemistry interactions are determined by changes in the atmospheric oxidation potential, where ozone and the hydroxyl radical (OH) are important.