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Carbon monoxide over the Amazon Basin during the wet season

Authors :
Harriss, R. C
Sachse, G. W
Hill, G. F
Gregory, G. L
Wade, L. O
Source :
Journal of Geophysical Research. 95
Publication Year :
1990
Publisher :
United States: NASA Center for Aerospace Information (CASI), 1990.

Abstract

Measurements of the distribution of carbon monoxide in the lower atmosphere (150-5000 m) over the Amazon region of Brazil during the wet season, taken in conjunction with the 1987 NASA Global Tropospheric Experiment/Amazon Boundary Layer Experiment (ABLE 2B), are analyzed. About 100 hr of airborne, in situ CO measurements were obtained using a tunable diode laser system, providing insights into factors influencing the basin-scale distribution of CO in the Amazonian troposphere during wet season conditions. Distribution of CO over the altitudes 0.15-4.5 km was influenced by such factors as surface emissions from biological sources and long-range transport of pollutants from Northern Hemisphere sources. It is noted that the disruption of mixed layer growth and decay processes has a particularly important influence on CO concentration in the daytime lower troposphere and that the correlation of CO with O3 was positive under conditions influenced by Northern Hemisphere air and negative under all other conditions observed.

Subjects

Subjects :
Geophysics

Details

Language :
English
ISSN :
01480227
Volume :
95
Database :
NASA Technical Reports
Journal :
Journal of Geophysical Research
Publication Type :
Report
Accession number :
edsnas.19900065063
Document Type :
Report