Acetone measurements in the upper troposphere and lower stratosphere - Implications for hydroxyl radical abundances

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Acetone, Atmospheric Composition, Gas Chromatography, Hydroxyl Radicals, Stratosphere, Troposphere, Abundance, Aerosols, Air Pollution, Air Sampling, Atlantic Ocean, Atmospheric Chemistry, Mass Spectroscopy

Scientific paper

The first measurements of atmospheric acetone abundances over an extended altitude range (5900-11,300 m) covering the lowermost part of the stratosphere and the upper troposphere are reported. The measured upper tropospheric abundances, averaging 120 parts per trillion by volume, are substantially lower than the average values of 470 p.p.t.v. measured at ground level. Above the tropopause, a marked decrease of the acetone mixing ratio was observed. These data have interesting implications for the chemistry of nonmethane hydrocarbons and possibly also hydroxyl radical abundances.

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