^a R_tot = R_CH4 + R_CO + R_NO2 + R_sumVOC = k_OH+CH4 [CH₄] + k_OH+CO [CO] + k_OH+NO2 [NO₂] + ∑ (k_OH+VOC [VOC]); may not match sum of individual contributions due to skewness.

^b Data from Table 1 in Gilman et al. (2009).

^c Wind directions limited to 60–140 degrees, all times of year.

^d Only summer (DOY 120–270, May through September) in addition to wind direction limitation.

^e Methane was assumed to be constant at 2000 ppb, and carbon monoxide was made to vary smoothly between 100 (winter maximum) and 60 ppb (summer minimum), at the Floresville site.

^f Number in parentheses reflects reactivity excluding oxygenated VOCs.