Atmospheric tracer concentrations from elevated source in urban core

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Journal of Environmental Engineering (New York); (United States)

DOI:https://doi.org/10.1061/(ASCE)0733-9372(1995)121:1(5)· OSTI ID:6654869

Thistle, H W ^[1]; Murray, D R; Ratte, M R ^[2]; Carroll, M R ^[3]

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1. Forest Service, Missoula, MT (United States)
2. TRC Environmental Corp., Windsor, CT (United States)
3. Minneapolis Energy Center, MN (United States)

An understanding of building wake effects is critical to the correct simulation of near-field dispersion of air pollutants that can be entrained in the wake cavity. Downwash of effluent plumes from elevated sources due to building wake effects can raise atmospheric concentrations of the effluent gas near ground level close to the source. Maximum observed ground level concentrations can be due to downwash under certain circumstances. In this field experiment 51 SF[sub 6] samplers were deployed to measure the near-field tracer concentrations due to an elevated point source of heated effluent under stable to neutral atmospheric conditions in urban core. Over 2,000 hourly samples were collected and analyzed. Isopleths of SF[sub 6] hourly concentrations indicate a complicated relationship between concentration and the individual and aggregate position, as well as between concentration and the geometry of surrounding obstacles.

• OSTI ID: 6654869
• Journal Information: Journal of Environmental Engineering (New York); (United States), Journal Name: Journal of Environmental Engineering (New York); (United States) Vol. 121:1; ISSN 0733-9372; ISSN JOEEDU
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
AIR POLLUTION MONITORING
ECOLOGICAL CONCENTRATION
MONITORING
POLLUTANTS
POLLUTION
POLLUTION SOURCES
PRECIPITATION SCAVENGING
SEPARATION PROCESSES
URBAN AREAS
WASHOUT