is estimated from the distant orchard edge to sampling point.
Considering tropospheric oxidation rate of CP by OH is
1.4 104 s1 (for [OH] ¼ 1.5 106 molecule cc1
; Munoz et al., ~
2014), about 3% of drifted CP is expected to oxidize to CPO during
transport; similar to the measured ratio of CPO to CP.