A comparison of acid aerosol and ozone exposure patterns in a summertime study of metropolitan Philadelphia

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:197462

Waldman, J M; Liang, C S.K. ^[1]; Koutrakis, P; Suh, H; Allen, G ^[2]; Burton, R; Wilson, W E ^[3]

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1. Environmental and Occupational Health Sciences Inst., Piscataway, NJ (United States). Div. of Exposure Measurement and Assessment
2. Harvard School of Public Health, Boston, MA (United States)
3. Environmental Protection Agency, Research Triangle Park, NC (United States). Atmospheric Research and Exposure Assessment Lab.

A study of acid aerosol and ozone exposure patterns was conducted for metropolitan Philadelphia between June and August 1992. Included in the study design were daily monitoring of particulate strong acidity (PSA), sulfate (SO{sub 4}{sup {minus}2}) and hourly ozone data (O{sub 3}) at a citywide network. A continuous sulfate thermal speciation analyzer at one site collected hourly concentration data for SO{sub 4}{sup {minus}2} aerosol. The current paper presents temporal patterns of continuous measurements for O{sub 3} and SO{sub 4}{sup {minus}2} aerosol. Both pollutants had similar daily peak periods in the mid-afternoon, although the range for O{sub 3} was much greater than for SO{sub 4}{sup {minus}2} aerosol. The daily peak values were also correlated for the two species during the study period. It seems that many of the same meteorological factors affect the spatial and temporal patterns for these lung irritants. Hence, the similarity in exposure patterns for O{sub 3} and SO{sub 4}{sup {minus}2} aerosol is reason for concern, regarding possible synergism from coincident doses.

• OSTI ID: 197462
• Report Number(s): CONF-9405167--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
AIR POLLUTION MONITORING
COMPARATIVE EVALUATIONS
EXPERIMENTAL DATA
HOURLY VARIATIONS
OZONE
PENNSYLVANIA
PH VALUE
SEASONAL VARIATIONS
SULFATES