Resuspension of particulate chemical species at forested sites

Article Abstract:

Estimation by aerodynamic surrogate surfaces anf throughfall of the resuspension rates of particulate chemical species from forests are discussed. Vertical variation in resuspension was estimated by placing surrogate surfaces at different heights. The resuspension rate of the whole canopy was estimated by throughfall measurements. It was found that the resuspension rates within the crown were only slightly less than those above the canopy in contrast with the mean speed wind.

Analysis, Aerodynamics, Surface chemistry, Plant canopies

---

Determination of size-dependent dry particle deposition velocities with multiple intrinsic elemental tracers

Article Abstract:

Dry deposition flux and aerosol size distribution were measured in Lake Michingan during summer in 1994. A constrained chemical mass balance deposition model proved useful in obtaining physically significant deposition velocities (Vd). Minimum Vd values for particles with physical diameters between 0.09 and 0.53 micronm averaged 0.006 to 0.005 cm s-1 were obtained under stable conditions and mean wind speed of 4.0 m s-1.

Research and Development in the Physical, Engineering, and Life Sciences, Air Pollution Control R&D, Models, Air pollution, Air pollution research, Pollution control research, Polycyclic aromatic compounds, Lake Michigan, Atmospheric research

---

Soiling patterns on a tall limestone building: changes over 60 years

Article Abstract:

Researchers studied the soiling pattern of the Cathedral of Learning building at the University of Pittsburgh. The soiling pattern of the limestone building suggests that rain washes off soiled areas spanning several decades unlike soiling which occurs rapidly.

United States, Science & research, Cut stone and stone products, Cut Limestone Products, Cut Stone and Stone Product Manufacturing, Buildings and facilities, Pollution, Limestone, Cut stone, Pittsburgh, University of. Cathedral of Learning

Similar abstracts:

• Abstracts: The price of compromise. When federal science stopped. Appropriators bullish on biomedicine
• Abstracts: Creatures of the thermal vents. The forecast for wind power. Imperiled species
• Abstracts: Rebound of the bascule bridge. Holding steady. A new skew
• Abstracts: The OCEA awards of merit. Federal projects recognized for design achievement. OCEA merit awards
• Abstracts: The international dimension to industry-academic links. Sourcing external technological knowledge: a decision support framework for firms

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.