A tracer calibration of back trajectory analysis at the Grand Canyon
| Autor: | Jonathan D. W. Kahl, Desong Liu, Luis. A. de P Vasconeelos, Warren H. White, Edward S. Macias |
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| Rok vydání: | 1996 |
| Předmět: |
Canyon
Atmospheric Science geography geography.geographical_feature_category genetic structures Ecology Meteorology Calibration (statistics) Paleontology Soil Science Forestry Grid cell Aquatic Science Oceanography Monitoring site Geophysics Space and Planetary Science Geochemistry and Petrology TRACER Earth and Planetary Sciences (miscellaneous) Trajectory Environmental science Trajectory analysis Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research: Atmospheres. 101:19329-19335 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/95jd02609 |
| Popis: | The potential of routine back trajectory analyses to locate sources of contaminants in air at Grand Canyon is investigated with data on methylchloroform (CH 3 CCl 3 ) concentrations collected during the Subregional Cooperative Electric Utility, Department of Defense, National Park Service, and Environmental Protection Agency Study(SCENES). Following a now-standard approach, the distribution of back trajectory segment endpoints over a latitude-longitude grid is examined as a function of measured concentrations at the fixed monitoring site. Grid cells in which segment endpoints are preferentially associated with high concentrations are then identified as candidate emissions sources. The method correctly identifies southern California as a source of CH 3 CCl 3 . An objective rationale is developed for screening out chance associations, attributable to statistical fluctuations, and the results are evaluated for real and hypothetical tracers with known, simple distributions. |
| Databáze: | OpenAIRE |
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