book reviews

book reviews Concentration Fluctuations and Averaging time, instrument response time, and mass-weighted Time in Vapor Clouds. David J. Wilson . 1 995 . 1 8 1 sample time. pp. $90.00 . Hardbound. American Institute of Chemical In general, the spread of an instantaneous plume is Engineers. ISB N 0-8169-0679-3. mor e narrow than the spread of the time-averaged plum e as a result of plum e meander; thus, mean con- Most of the widely used regulatory models predict centration s will nearly always underestimate maxi- concentrations downwind of contaminant sources for mu m short-term exposures. The ratio of the instanta- averaging periods between one hour and one year. The neous diffusion coefficien t to the mean diffusion co- concentration at an impacted receptor, however, fluc- efficien t should depend on travel time, corresponding tuates instantaneously in response to variability of the averaging times, and the nature of the turbulence caus- turbulen t atmospheric processes, which dilute and ing diffusion and meander. This topic is addressed in advect the pollutant; thus, the maximum concentra- chapte r 3 in terms of power-law approaches and in term s of Gifford's random force model for several tion during a one-hour period may be much greater http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Bulletin of the American Meteorological Society American Meteorological Society

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Publisher
American Meteorological Society
Copyright
Copyright © American Meteorological Society
ISSN
1520-0477
D.O.I.
10.1175/1520-0477-77.8.1863
Publisher site
See Article on Publisher Site

Abstract

Concentration Fluctuations and Averaging time, instrument response time, and mass-weighted Time in Vapor Clouds. David J. Wilson . 1 995 . 1 8 1 sample time. pp. $90.00 . Hardbound. American Institute of Chemical In general, the spread of an instantaneous plume is Engineers. ISB N 0-8169-0679-3. mor e narrow than the spread of the time-averaged plum e as a result of plum e meander; thus, mean con- Most of the widely used regulatory models predict centration s will nearly always underestimate maxi- concentrations downwind of contaminant sources for mu m short-term exposures. The ratio of the instanta- averaging periods between one hour and one year. The neous diffusion coefficien t to the mean diffusion co- concentration at an impacted receptor, however, fluc- efficien t should depend on travel time, corresponding tuates instantaneously in response to variability of the averaging times, and the nature of the turbulence caus- turbulen t atmospheric processes, which dilute and ing diffusion and meander. This topic is addressed in advect the pollutant; thus, the maximum concentra- chapte r 3 in terms of power-law approaches and in term s of Gifford's random force model for several tion during a one-hour period may be much greater

Journal

Bulletin of the American Meteorological SocietyAmerican Meteorological Society

Published: Aug 1, 1996

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