NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Formic and acetic acid over the central Amazon region, Brazil. I - Dry seasonThe concentrations of formic and acetic acids in the gas phase, atmospheric aerosol, and rainwater samples collected in Amazonia at ground level and in the atmosphere during the Amazon Boundary Layer Experiment in July/August 1985 were analyzed by ion exchange chromatography. The diurnal behavior of both acids at ground level and their vertical distribution in the forest canopy point to the existence of vegetative sources as well as to production by chemical reactions in the atmosphere. The concentrations of formic and acetic acids in the gas phase were about 2 orders of magnitude higher than the corresponding concentrations in the atmospheric aerosol. In rainwater, the total formate and acetate represented about one half of the anion equivalents, in contrast to less than 10 percent of the soluble anionic equivalents contributed by these acids in the atmospheric aerosol. The observed levels of these ions in rainwater are considered to be the result of a combination of chemical reactions in hydrometeors and the scavenging of the gaseous acids by cloud droplets.
Document ID
19880040047
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Andreae, M. O.
(Max-Planck-Inst. fuer Chemie Mainz, Germany)
Andreae, T. W.
(Max-Planck-Institut fuer Chemie Mainz, Federal Republic of Germany, United States)
Talbot, R. W.
(Max-Planck-Inst. fuer Chemie Mainz, Germany)
Harriss, R. C.
(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
88A27274
Funding Number(s)
CONTRACT_GRANT: NSF ATM-84-07137
CONTRACT_GRANT: NAG1-588
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available