Skip to Main Content
Passive monitoring techniques for evaluating atmospheric ozone and nitrogen exposure and deposition to California ecosystemsAuthor(s): Mark E. Fenn; Andrzej Bytnerowicz; Susan L. Schilling
Source: Gen. Tech. Rep. PSW-GTR-257. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station
Publication Series: General Technical Report (GTR)
Station: Pacific Southwest Research Station
PDF: Download Publication (9.0 MB)
DescriptionMeasuring the exposure of ecosystems to ecologically relevant pollutants is needed for evaluating ecosystem effects and to identify regions and resources at risk. In California, ozone (O3) and nitrogen (N) pollutants are of greatest concern for ecological effects. "Passive" monitoring methods have been developed to obtain spatially extensive measurements of atmospheric pollutant concentrations and deposition flux inputs of N and other nutrient ions in California ecosystems. Two general types of passive samplers have been used: (1) passive samplers for determining time-averaged concentrations of gaseous pollutants in the atmosphere and (2) ion exchange resin (IER) collectors for measuring ionic deposition inputs. Common pollutants measured with passive samplers include nitrogen dioxide, nitric oxide, nitric acid vapor, ammonia, and O3. Common ions measured with IER deposition samplers include nitrate, ammonium, sulfate, phosphate, chloride, calcium, magnesium, potassium, and sodium. Laboratory and field methods, and the principles of use and appropriate applications for these atmospheric and deposition samplers, are described. Data from monitoring networks using these techniques help identify areas at risk and provide the foundation for describing pollution impacts to sensitive resources. In this report, several alternative approaches for estimating N deposition are also considered as a guide for selecting appropriate techniques in ecosystemeffects studies in California and elsewhere. We emphasized that measurements of N deposition in precipitation (wet deposition) alone are highly inadequate for characterizing deposition inputs under the climatic conditions of California and much of the arid West. Dry deposition of N must also be accounted for by using methods such as those described herein.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationFenn, Mark E.; Bytnerowicz, Andrzej; Schilling, Susan L. 2018. Passive monitoring techniques for evaluating atmospheric ozone and nitrogen exposure and deposition to California ecosystems. Gen. Tech. Rep. PSW-GTR-257. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 129 p.
KeywordsNitrogen deposition, passive samplers, ozone, air pollution, dry deposition, ecosystem effects, atmospheric deposition
- Air pollution and watershed research in the central Sierra Nevada of California: nitrogen and ozone
- Ozone, nitric acid, and ammonia air pollution is unhealthy for people and ecosystems in southern Sierra Nevada, California
- Large-scale monitoring of air pollution in remote and ecologically important areas
XML: View XML