Single-particle measurements of black carbon (BC) aerosol and simultaneous measurements of carbon monoxide (CO) were acquired aboard the NOAA WP-3D aircraft during the 2006 Texas Air Quality Study (TexAQS). Observed average BC mass loadings, estimated to account for ∼90% of the ambient BC mass, decreased by more than 2 orders of magnitude from the polluted boundary layer to the clean middle troposphere (6 km). A strong positive, but non-linear, correlation was observed between simultaneous measurements of BC and CO. Based on an analysis of all the data below 1 km, we report a compact relationship between BC and CO with a slope of 5.8 ± 1.0 ng BC (kg dry air)-1 (ppb CO)-1 that is representative of regional urban and industrial emissions from Houston and Dallas. The BC /CO emission ratio for a fresh biomass-burning plume was estimated at 9 ± 2 ng kg-%1 ppb-1. Copyright 2008 by the American Geophysical Union.
CITATION STYLE
Spackman, J. R., Schwarz, J. P., Gao, R. S., Watts, L. A., Thomson, D. S., Fahey, D. W., … Ryerson, T. B. (2008). Empirical correlations between black carbon aerosol and carbon monoxide in the lower and middle troposphere. Geophysical Research Letters, 35(19). https://doi.org/10.1029/2008GL035237
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