Physiochemical Measurement and Optical Characteristics of Boundary Layer Aerosol Fields.

摘要

LONG TERM GOALS. Establish an improved understanding of the properties and factors that control the structure of near surface marine aerosol fields and their optical properties. Our focus is on the production, transformation and optical properties of the aerosol with particular interest in sea-salt and submicrometer sulfate in a coastal setting with and without breaking waves. The results will be used to help refine the NAVY NOVAM, NAM etc. aerosol models. SCIENTIFIC OBJECTIVE. We will characterize the size-spectra of submicron and supermicron particles from braking waves and bubble bursting. We will also use rapid response coordinated aerosol measurements from a portable laboratory and aircraft in conjunction with our UH lidar (Shiv Sharma - ONR N00014- 96-1-0317) to characterize properties and variability in 3-dimensional aerosol fields and link them to process that can be modeled. Both in-situ aircraft and time-sequence coastal data will be used to generate statistics of the atmospheric aerosol and its size dependent properties that can be related to the statistics of their distribution and optical effects as detected by the lidar. When present, we will use the sulfate plume emitted from Kiluaea volcano as a surrogate for continental pollution aerosol since the concentrations and size distributions are similar. Additional specific experiments to characterize individual wave breaking events will be carried out in order to quantify the perturbations to the full aerosol size distribution and their optical effects that arise from this process.