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When considering biosphere-atmosphere exchange of trace gases and volatile aerosols, significant advances have been made both from an experimental and modelling point of view and on several scales. This was particularly stimulated by the availability of new datasets generated from improvements in analytical methods and flux measurement techniques. Recent research advances allow us, not only to identify major mechanisms and factors affecting the exchanges between the biosphere and the atmosphere, but also to recognize several gaps in the methodologies used in accounting for emissions and deposition in landscape and global scale models. This work aims at (i) reviewing exchange processes and modelling schemes, parameterisations and datasets, (ii) presenting a common conceptual framework to model soil-vegetation-atmosphere exchange of reactive trace gases and aerosols accounting for in-canopy transfer chemical interactions and (iii) discussing the key elements of the agreed framework.
List of contents
Introduction.- Organisation and structure of the workshop.- Section I: Review documents.- Advances in understanding, models and parameterisations of biosphere-atmosphere ammonia exchange.- Modelling atmosphere-biosphere exchange of Ozone and Nitrogen oxides.- Bidirectional exchange of volatile organic compounds.- Surface / atmosphere exchange of atmospheric acids and aerosols, including the effect and model treatment of chemical interactions.- Section II: Synthesis according to compounds.- Modelling the air-surface exchange of ammonia from the field to global scale.- O3 and NOx exchange.- Bi-directional exchange of volatile organic compounds.- Aerosol and Acid Gases.- Section III: Synthesis according to model component.- Gaseous stomatal exchange and relation to ecosystem functioning.- Impact of leaf surface and in-canopy air chemistry on the ecosystem/atmosphere exchange of atmospheric pollutants.- Soil and litter exchange of reactive trace gases.- In-canopy turbulence - State of the art and potential improvements.- A common conceptual modelling framework for reactive trace gases and volatile aerosols atmosphere-biosphere exchange in chemical transport models.- General model requirements.- The ideal model for each compound.- Ammonia.- Nitrogen oxides and ozone.- Aerosol and acid gases.- Volatile organic compounds (VOC).- Emerging common features in the modelling framework.- Acknowledgements.
Summary
When considering biosphere–atmosphere exchange of trace gases and volatile aerosols, significant advances have been made both from an experimental and modelling point of view and on several scales. This was particularly stimulated by the availability of new datasets generated from improvements in analytical methods and flux measurement techniques. Recent research advances allow us, not only to identify major mechanisms and factors affecting the exchanges between the biosphere and the atmosphere, but also to recognize several gaps in the methodologies used in accounting for emissions and deposition in landscape and global scale models. This work aims at (i) reviewing exchange processes and modelling schemes, parameterisations and datasets, (ii) presenting a common conceptual framework to model soil-vegetation-atmosphere exchange of reactive trace gases and aerosols accounting for in-canopy transfer chemical interactions and (iii) discussing the key elements of the agreed framework.
