TY - JOUR
T1 - A 13-week comparison of passive and continuous ozone monitors at forested sites in north-central Pennsylvania
AU - Skelly, John M.
AU - Savage, James E.
N1 - Funding Information:
This research has been supported by the Pennsylvania Department of Environmental Protection, Bureau of Air Quality, Harrisburg, PA; the U.S. Environmental Protection Agency Exposure Methods and Monitoring Branch, Research Triangle Park, NC; the Pennsylvania Department of Conservation and Natural Resources, Bureau of Forestry, Harrisburg, PA; several private citizens and hunt clubs in north-central Pennsylvania; and the Environmental Resources Research Institute, Pennsylvania State University, University Park, PA. The interest and support for the overall project by Mr. Jim Salvaggio, Director, Bureau of Air Quality, and Mr. Jeffrey Miller, Chief, Central Operations Section Division of Air Quality Monitoring, Pennsylvania Department of Environmental Protection, are gratefully acknowledged.
PY - 2001/9
Y1 - 2001/9
N2 - Ogawa passive O3 samplers were used in a 13-week study (June 1-September 1, 1999) involving 11 forested and mountaintop sites in north-central Pennsylvania. Four of the sites were collocated with TECO model 49 O3 analyzers. A significant correlation (p < 0.0001) was found for 24-hr average weekly O3 concentrations between the two methodologies at the four sites with collocated monitors. As expected, there were positive relationships between increasing elevation of the sites and increasing O3 concentrations. No O3 exposure patterns were found on a west-to-east or south-to-north basis; however, the area known for lower O3 exposures within a smaller subsection of the study area showed consistently lower O3 exposures. Preliminary results regarding relationships of symptom responses within O3-sensitive bioindicators are also presented with black cherry (Prunus serotina, Ehrh.) and common milkweed (Asclepias syriaca, L.) showing clear evidence of increasing injury with increasing O3 exposures. Due to the extremely dry conditions encountered in north-central Pennsylvania during the 1999 growing season, O3-induced symptoms were sporadic and quite delayed until late-season rains during the latter portion of the observation period.
AB - Ogawa passive O3 samplers were used in a 13-week study (June 1-September 1, 1999) involving 11 forested and mountaintop sites in north-central Pennsylvania. Four of the sites were collocated with TECO model 49 O3 analyzers. A significant correlation (p < 0.0001) was found for 24-hr average weekly O3 concentrations between the two methodologies at the four sites with collocated monitors. As expected, there were positive relationships between increasing elevation of the sites and increasing O3 concentrations. No O3 exposure patterns were found on a west-to-east or south-to-north basis; however, the area known for lower O3 exposures within a smaller subsection of the study area showed consistently lower O3 exposures. Preliminary results regarding relationships of symptom responses within O3-sensitive bioindicators are also presented with black cherry (Prunus serotina, Ehrh.) and common milkweed (Asclepias syriaca, L.) showing clear evidence of increasing injury with increasing O3 exposures. Due to the extremely dry conditions encountered in north-central Pennsylvania during the 1999 growing season, O3-induced symptoms were sporadic and quite delayed until late-season rains during the latter portion of the observation period.
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U2 - 10.1080/10473289.2001.10464355
DO - 10.1080/10473289.2001.10464355
M3 - Article
C2 - 11575881
AN - SCOPUS:0034847923
SN - 1096-2247
VL - 51
SP - 1280
EP - 1287
JO - Journal of the Air and Waste Management Association
JF - Journal of the Air and Waste Management Association
IS - 9
ER -