OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) · 1986 · 35 citations · 0 references
Natural SciencesEarth SciencesEnvironmental SciencesAir PollutionAtmospheric ChemistryAtmospheric ScienceAir Pollution DispersionAir Pollution InstrumentationAir Pollution MeasurementAir Pollution ModelingAir SamplingSource SamplingAtmospheric Pollutant TransportEnvironmental TracersLong-range Atmospheric TransportLong-range TransportSamplingTracer Release ExperimentsTracer SamplingTracer Studies
The Cross‑Appalachian Tracer Experiment (CAPTEX ’83) was a large field study that used a perfluorocarbon tracer to simulate long‑range atmospheric transport and diffusion of pollutants. CAPTEX ’83 released seven tracers (five from Dayton, Ohio, and two from Sudbury, Ontario) between mid‑September and October 1983, deploying 80 ground‑level samplers 300–1100 km away, collecting ~3 000 3‑ and 6‑hour samples, and supplementing with 7 aircraft that gathered >1 600 samples at 200–900 km transects, while rawinsonde observations were quadrupled and 10 additional stations added.
The Cross-Appalachian Tracer Experiment (CAPTEX '83) was a major field study using a perfluorocarbon tracer to simulate the long-range transport and diffusion of pollutants in the atmosphere. The experiment consisted of 7 tracer releases, 5 from Dayton, Ohio, and 2 from Sudbury, Ontario, during mid-September through October 1983. Automatic, sequential ground-level samplers were operated at 80 sites in the northeastern United States and southeastern Canada at distances of 300 to 1100 km from the release sites. About 3000 3- and 6-hour-long samples were collected in the sampling network during CAPTEX. To determine the vertical distribution of tracer, seven aircraft collected over 1600 samples at various plume transects from 200 to 900 km from the releases. The regular rawinsonde observations in the CAPTEX sampling area were increased to 4 times daily following each release, and 10 additional rawinsonde stations were established to fill spacial gaps in the regular network while operating on a similar time schedule.