Carbon monoxide over the Amazon basin during the wet season

Journal Article · Thu Sep 20 00:00:00 EDT 1990 · Journal of Geophysical Research; (USA)

DOI:https://doi.org/10.1029/JD095iD10p16927· OSTI ID:6100647

Harriss, R C ^[1]; Sachse, G W; Hill, G F; Gregory, G L ^[2]; Wade, L O ^[3]

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1. Univ. of New Hampshire, Durham (USA)
2. NASA Langley Research Center, Hampton, VA (USA)
3. Planning Research Corp., Hampton, VA (USA)

Measurements of carbon monoxide (CO) were made over the Amazon Basin of Brazil during the 1987 wet season as part of the NASA Global Tropospheric Experiment/Amazon Boundary Layer Experiment (ABLE 2B). The distribution of CO over the altitude range sampled (0.15-4.5 km) was influenced by surface emissions from biological sources, long-range transport of pollutants from northern hemisphere sources, and by transport processes associated with local convective mixing. Surface sources are indicated by a qualitative interpretation of the typical pattern of decreasing concentrations with increasing altitude and increasing concentrations of CO at 0.15-km altitude during a transect from the Atlantic coast to the central basin. Atmospheric convective activity produced irregular patterns of variability at time scales of less than 1 hour over a localized area. The disruption of mixed layer growth and decay processes has a particularly important influence on CO concentrations in the daytime lower troposphere. Intrusions of northern hemisphere air into the central Amazon resulted in increased CO concentrations in the lower and midtroposphere. The correlation of CO with O{sub 3} was positive under conditions interpreted as being influenced by northern hemisphere air, and negative during all other meteorological conditions experienced in ABLE 2B.

• OSTI ID: 6100647
• Journal Information: Journal of Geophysical Research; (USA), Vol. 95:D10; ISSN 0148-0227
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
01 COAL, LIGNITE, AND PEAT
BRAZIL
AIR POLLUTION
CARBON MONOXIDE
ECOLOGICAL CONCENTRATION
ALTITUDE
AMAZON RIVER
ATLANTIC OCEAN
ATMOSPHERIC CHEMISTRY
CORRELATIONS
EMISSION
FORESTS
LONG-RANGE TRANSPORT
MIXING
NORTHERN HEMISPHERE
OZONE
PLANTS
POLLUTION SOURCES
SEASONAL VARIATIONS
TROPOSPHERE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMISTRY
DEVELOPING COUNTRIES
EARTH ATMOSPHERE
EARTH PLANET
ENVIRONMENTAL TRANSPORT
LATIN AMERICA
MASS TRANSFER
OXIDES
OXYGEN COMPOUNDS
PLANETS
POLLUTION
RIVERS
SEAS
SOUTH AMERICA
STREAMS
SURFACE WATERS
VARIATIONS
540120* - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)
010900 - Coal
Lignite
& Peat- Environmental Aspects