On the use of surface equivalent potential temperature in isolating the influence of local as opposed to transported sources on aerosol concentrations
| Autor: | J. A. Samson, J. S. Obremski, Liaquat Husain, Vincent A. Dutkiewicz |
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| Rok vydání: | 1989 |
| Předmět: |
Atmospheric Science
Ecology Meteorology Paleontology Soil Science Forestry Aquatic Science Particulates Oceanography Atmospheric sciences Aerosol Troposphere Atmosphere Depth sounding Geophysics Space and Planetary Science Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Environmental science Surface layer Precipitation Equivalent potential temperature Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 94:11117 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/jd094id08p11117 |
| Popis: | An atmospheric aerosol transport hypothesis is presented. An analytical technique, based on an analysis of surface equivalent potential temperature, is used to isolate meteorological conditions that encourage an introduction of transported (advected) aerosols into the surface layer. The difference between the equivalent potential temperature at the surface and 700- mbars and the identification of periods of precipitation, are used to define the stability characteristics of the lower troposphere. It is suggested that these three meteorological parameters provide an excellent indication of the horizontal and vertical exchange occurring in the lower troposphere. These parameters, calculated for six upper air sounding stations in North America, are used to isolate those time periods when aerosol populations are most likely influenced by local as opposed to advected sources. Sources of particulate SO{sub 4}, Al, Se, and crustal corrected V measured at sampling sites in New York State are evaluated with this technique. {copyright} American Geophysical Union 1989 |
| Databáze: | OpenAIRE |
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