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Atmospheric geochemistry of formic and acetic acids at a mid-latitude temperate siteTropospheric concentrations of formic and acetic acids in the gas, the aerosol, and the rainwater phases were determined in samples collected 1-2 m above ground level at an open field site in eastern Virginia. These acids were found to occur principally (98 percent or above) in the gas phase, with a marked annual seasonality, averaging 1890 ppt for formate and 1310 ppt for acetate during the growing season, as compared to 695 ppt and 700 ppt, respectively, over the nongrowing season. The data support the hypothesis that biogenic emissions from vegatation are important sources of atmospheric formic and acetic acid during the local growing season. The same time trends were observed for precipitation, although with less defined seasonality. The relative increase of the acetic acid/formic acid ratio during the nongrowing season points to the dominance of anthropogenic inputs of acetic acid from motor vehicles and biomass combustion in the wintertime.
Document ID
19880040048
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Talbot, R. W.
(NASA Langley Research Center Hampton, VA, United States)
Beecher, K. M.
(STX Corp. Hampton, VA, United States)
Harriss, R. C.
(NASA Langley Research Center Hampton, VA, United States)
Cofer, R. W., III
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
February 20, 1988
Publication Information
Publication: Journal of Geophysical Research
Volume: 93
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
88A27275
Funding Number(s)
CONTRACT_GRANT: NAS1-16978
Distribution Limits
Public
Copyright
Other

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