Key Points:

On a molar basis, the total measured VOC emitted by western U.S. wildfires relative to CO (sum of ERs) ranges from 90.0 ppbv ppmv-1 to 206.1 ppbv ppmv-1, with an average of 148.3 ± 29.6 ppbv ppmv-1. This sum of ERs is also similar to the laboratory-determined sum of 144.5 ppbv ppmv-1 for western U.S. fuels (Koss et al., 2018). ................
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