title: The use of passive sampling to monitor forest exposure to O3, NO2 and SO2: a review and some case studies.
abstract: The use of passive sampler systems is reviewed and discussed. These devices are able to determine both spatial and temporal differences in canopy exposure, as is demonstrated by their use in extensive monitoring of air-pollution exposure in forest health plots. Categorising forest health monitoring plots according to air-pollution exposure permits cause-effect analysis of certain forest health responses. In addition, passive sampling may identify areas affected by interaction between different gaseous pollutants. Passive samplers at the stand level can be used to resolve vertical profiles of ozone within the stand, and edge effects, which are important in exposure of understorey and ground flora. Recent case studies using passive samplers to determine forest exposure to gaseous pollutants indicate a potential for the development of spatial models on regional-, landscape-, and stand-level scales and the verification of atmospheric transport models.
authors.affiliation: Natural Resources Canada, Canadian Forest Service-Atlantic Forestry Centre, PO Box 4000, Fredericton, NB, Canada E3B 5P7. rcox@nrcan.gc.ca
authors.forename: Roger M
authors.initials: RM
authors.lastname: Cox
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D004781:Environmental Exposure / Q000032:analysis; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D009509:New Brunswick; D009585:Nitrogen Dioxide / Q000032:analysis; D010126:Ozone / Q000032:analysis; D013458:Sulfur Dioxide / Q000032:analysis; D014197:Trees
chemical_list: D000393:Air Pollutants; D013458:Sulfur Dioxide; D010126:Ozone; D009585:Nitrogen Dioxide