R.Manasseh Fluid Dyn Papers
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The complex topography and interactions between land- and sea-breeze effects in Sydney create distributions of pollutant indicators that very rapidly in time and with location in the metropolitan area. The day studied here was a day of relatively light winds in which dynamical processes driven by slight temperature and topography variations had a significant influence on the distribution of pollution. During the transition from a land- to a sea-breeze regime, the land- and sea-breeze effects appeared to be present simultaneously in different parts of the urban coastline. Katabatic land breezes created a zone of pollutant indicators offshore; it is likely that some of this air was later returned inland by the sea breeze.
The study was a collaboration between FIAMS, the Fluid Dynamics Group of the School of Mathematics at the University of NSW (UNSW) and the Environment Protection Authority of New South Wales (EPA). The EPA provided the airborne chemistry instruments. We are grateful to EPA staff Michelle Lashmar and Matt Hodge for their advice and participation, and to Greg Nippard (UNSW) for essential preparatory and air-crewing work. During the study, the aircraft was based at the Qantas Jet Base at Sydney's Kingsford-Smith Airport. The operational support received from Qantas Executive Air Services is gratefully acknowledged, as is the cooperation of the Bankstown Regional Office of the Civil Aviation Authority which issued special dispensations for flying low-level transverses in the Sydney airspace. Thanks are also due to Mark Gibbs, Anthony Macks and Brad Morris for the yacht measurements. Financial support was provided by the EPA and an Australian Research Council Small Grant.