Abstract
We have developed a unique representation of the properties of volatile particles produced by jet aircraft. Our new parameterisation is based upon detailed microphysical mechanisms that incorporate the latest phenomenology observed in aircraft plumes, including the roles of chemi-ions and organic vapours. By comparing particle measurements taken under a wide range of flight conditions, and normalising these using our model, we have reduced dramatically the large residual variability in the volatile particle emission indices inferred from field observations. By coupling our model to a global tracer model, we have been able to narrow considerably the range of predicted global enhancements in background aerosol surface area densities associated with commercial aircraft operations (not discussed here). Our novel approach should prove to be useful in future evaluations of the atmospheric perturbations associated with aviation.
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