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Carbon Monoxide
Carbon monoxide is another carbonaceous gas in the earth's atmosphere
that participates in the global carbon cycle. Figure 13 gives the
sources and sinks of carbon monoxide in teragrams of carbon per year. Fossil
fuel combustion is a significant source, as is biomass burning. Carbon
monoxide also can be produced in secondary oxidation reactions with methane
or non-methane hydrocarbons (NMHC). Major sinks include reaction with
the hydroxyl radical and soil uptake. These estimates also carry large
uncertainties, but again it is very likely that anthropogenic sources dominate
natural sources. Carbon monoxide is much more reactive than carbon dioxide,
so its lifetime in the atmosphere is comparably shorter.
Measurements of N2O from satellites are described by
NASA.
