Content -- Preface -- Summary -- Opsummering -- 1. Introduction -- Climate change -- Global and regional climate change projections -- Impacts of climate change on air pollution -- The effect of meteorological variability on measured and modelled air pollution levels -- Projection of future air pollution levels in a changed climate -- Possible impacts of climate change on O3 -- Possible impacts of climate change on N -- Possible impacts of climate change on PM -- The question of scale -- Air pollution as a climate change driver -- The role of aerosols -- Online climate change and air pollution modelling -- Conclusions -- State of the science -- The major uncertainties -- The major challenges and future directions -- The Nordic perspective -- Overall recommendations -- Appendix 1Climate change - what we know and some myths -- What has been simulated with the (global) climate models, and what is relevant for air pollution -- What do we know (... or should know) about climate change in general. -- Climate myths -- Impacts of climate change on air pollution levels in the northern hemisphere with special focus on Europe and the Arctic -- Summary -- Introduction -- Model systems -- Results -- Impacts and importance in relevant to policy development -- Future outlook -- References -- Appendix 3 On the usage of an off-line chemistry transport model driven by a regional climate model to study air pollution and its impacts in the Nordic countries -- Abstract -- Introduction (Present status within the topic) -- Results -- Discussion -- Conclusion -- References -- Appendix 4 Enviro-HIRLAM: on-line coupled modelling of meteorological and atmospheric chemical transport processes with two-way feedbacks -- References: -- Appendix 5 Climate forcing of aerosols with heterogeneous chemical composition and complex internal structure -- Background.

Activities at SMHI -- References -- Appendix 6 Future human and vegetation exposure for ozone - European emissions, hemispheric background, climate change and local geography -- Abstract -- Regional ozone levels -- Local ozone concentrations near the ground -- Trends in local ozone and meteorology in west Sweden -- Discussion -- References -- Appendix 7 Global change and plant ozone uptake:Impact of elevated CO2 and meteorology -- Abstract -- Introduction -- Results - dose-modifying factor related to plant ozone uptake -- Discussion -- Conclusion -- References -- Appendix 8 Transport of short-lived pollutants into the Arctic, and why it is important for climate -- Abstract -- References.