Measurements of non-methane hydrocarbons, ozone, and meteorological and trace gas data were made at four rural sites within the southeastern United states as a part of the Southern Oxidants Sutyd. Fifty-six C_2-C(10) hydrocarbons were collected from 1200-1300 local time, once ever six days from September 1992 through October 1993. The light molecular wight alkanes (ethane, propane, n-butane, iso-butane), ethene and acetylene display a seasonal variation of a winter maximum and summer minimum.
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