Dry deposition of fine aerosol to a short grass surface |
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| Affiliation: | 1. Affiliate Assistant Professor of Medicine, Charles E. Schmidt College of Medicine, Florida Atlantic University;2. Fourth year medical student, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton;3. Department of Anesthesiology, Professional Education, Simulation Center, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton;4. Department of Medicine, Infectious Disease and Critical Care Medicine, University of Wisconsin School of Medicine & Public Health, Madison;5. Department of Emergency Medicine, Emergency Medicine Residency, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton;6. Department of Medicine and Department of Population Health and Social Medicine, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton;7. Department of Medicine, Internal Medicine Residency, Charles E. Schmidt College of Medicine, Florida Atlantic University, Boca Raton |
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| Abstract: | Soluble sulphate has been used as a marker for fine aerosols and dry deposition has been estimated using a profile technique. The effects of coarse particles were excluded from the measurements by passage of the sampled air through Nuclepore polycarbonate prefilters, resulting in a 2μm upper cut-off. A total of 99 separate experiments were conducted between June 1988 and June 1989 and 50 acceptable profiles remained after the application of a rigorous quality control procedure. The mean deposition velocity was found to be equal to 0.1 ± 0.03 (standard error) cm s−1. There were no observed dependences of deposition velocity on either atmospheric stability or friction velocity within the range of conditions encountered. |
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