Books about Washout from Amazon.com

This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
Precipitation scavenging can effectively remove particulates from the atmosphere. Interest in the phenomena waxed in the 1980s, but models developed at that time remain limited by the lack of both detailed, time-resolved wet deposition pattern measurements for model confirmation and real-time rain data for model execution. Recently, new rain products have become available that can revolutionize real-time use of precipitation scavenging models on the regional scale. We have utilized a 4-km, hourly resolution precipitation data set from the Arkansas Red-Basin River Forecast Center. A standard below-cloud aerosol scavenging model has been modified to incorporate the potentially larger scavenging in heavy rain events. This paper demonstrates the model on a sample rainfall data set. The simulations demonstrate the concentrating effect of rainfall, especially heavy rain, on deposition patterns. Wet deposition played an important role in the simulated fate and transport, removing as much as 70% of the released aerosol. .
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This digital document is a journal article from Atmospheric Environment, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The activity concentrations of ^7Be and ^2^1^0Pb were measured in Malaga, Southeastern Spain (36^o43'40''N; 4^o28'8''W) in aerosols, precipitation and dry fallout continuously and systematically for 8 years. At the same sampling point, aerosols were collected weekly on filters and monthly precipitation sampling was carried out to study deposition. The air concentration of ^7Be showed a seasonal increase during the spring and summer months while the air concentration of ^2^1^0Pb was greater in summer. The concentration data of ^7Be and ^2^1^0Pb together with meteorological variables were used for a comprehensive analysis of variations. The specific activities of ^7Be and ^2^1^0Pb in bulk deposition samples showed a similar seasonal trend variation to that of the aerosols concentrations. Using the concentrations of ^7Be and ^2^1^0Pb in air and their depositional fluxes, the deposition velocities of aerosols and washout ratios were calculated. The mean deposition velocity of ^7Be and ^2^1^0Pb over the 8-year period is 0.4 and 1.5cms^-^1, respectively, and the corresponding washout ratios are 477 and 1908, respectively. The results showed a prevailing influence of amount of rainfall for deposition velocities and other factors such as TSP, the number of rainy days and the number of dry days for washout ratios. A comparison of our measurements and other data obtained at different locations in the world was also made. .
Price: $8.95 [Notify me when price goes down.]