Carbon monoxide, tropospheric mixing ratio

Carbon Monoxide. Methods for determining carbon monoxide include detection by conversion to mercury vapor, gas filter correlation spectrometry, TDLAS, and grab sampling followed by gas chromatograph (GC) analysis. The quantitative liberation of mercury vapor from mercury oxide by CO has been used to measure CO (73). The mercury vapor concentration is then measured by flameless atomic absorption spectrometry. A detection limit of 0.1 ppbv was reported for a 30-s response time. Accuracy was reported to be 3% at tropospheric mixing ratios. A commercial instrument providing similar performance is available. 

Reichle Jr H.G, V.S. Connors, J.A. Holland, W.D. Hypes, HA. Wallio, J.C. Casas, B.B. Gormsen, M.S. Saylor and W.D. Hesketh (1986) Middle and upper tropospheric carbon monoxide mixing ratios as measured by a satellite-bome remote sensor during November 1981. Journal of Geophysical Research 91 10865-10887... 

Volume mixing ratio (ppm) of carbone monoxide in the troposphere (Seiler, 1974). (By courtesy of Tetha)... 

Fig. 4-7. Latitudinal distribution of carbon monoxide over the Atlantic Ocean. Open circles in the upper troposphere, from aircraft measurements. Filled circles at sea level, from measurements onboard of ships. Solid curve air mass-weighted average CO mixing ratio. [Adapted from Seiler and Schmidt (1974a).]...

Measurement of Air Pollution from Satellites Carbon Monoxide Mixing Ratios in Middle Troposphere during April and October 1994... 

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