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Atmosphere-ocean interactions: Global-scale impacts on tropospheric chemistry

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The two-way exchange of trace gases and particles from the ocean to the atmosphere can have profound impacts on the chemistry and physics of the atmosphere. It emerged a decade or so ago that ocean-sourced atmospheric halogen gases have a pervasive impact on tropospheric chemistry, and more recent work is establishing the role of surface iodine chemistry in enhancing the deposition of surface ozone. Sea salt aerosol produced from physical processes over the ocean surface can interact with gases to impact a range of atmospheric processes, including the cycling of reactive nitrogen oxides. This presentation will highlight the importance of air-sea exchanges for global atmospheric cycling and discusses the discovery of novel chemistry at the surface of the ocean and on marine aerosol, which helps us better understand these impacts.

This talk is part of the SciSoc – Cambridge University Scientific Society series.

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