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Measurements of atmospheric hydrocarbons and biogenic emission fluxes in the Amazon boundary layerTropospheric mixing ratios of methane, C2-C10 hydrocarbons, and carbon monoxide were measured over the Amazon tropical forest near Manaus, Amazonas, Brazil, in July and August 1985. The measurements, consisting mostly of altitude profiles of these gases, were all made within the atmospheric boundary layer up to an altitude of 1000 m above ground level. Data characterize the diurnal hydrocarbon composition of the boundary layer. Biogenic emissions of isoprene control hydroxyl radical concentrations over the forest. Biogenic emission fluxes of isoprene and terpenes are estimated to be 25,000 micrograms/sq m per day and 5600 micrograms/sq m per day, respectively. This isoprene emission is equivalent to 2 percent of the net primary productivity of the tropical forest. Atmospheric oxidation of biogenic isoprene and terpenes emissions from the Amazon forest may account for daily increases of 8-13 ppb for carbon monoxide in the planetary boundary layer.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Zimmerman, P. R.
(National Center for Atmospheric Research Boulder, CO, United States)
Greenberg, J. P.
(National Center for Atmospheric Research Boulder, CO, United States)
Westberg, C. E.
(National Center for Atmospheric Research Boulder, CO, 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
Accession Number
Distribution Limits

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