" For PAN and PPN, from Atkinson et al. (1997a); for MPAN, from Roberts and Bertman (1992); for PnBN, PiBN, and n- and /-c4H9c(0)00N02, from Grosjean et al. (1994a, 1994b) over a limited temperature range (291-299 K). Note that PAN is not in the high-pressure limit at 298 K and 1 atm, whereas the higher homologs are. h Assuming no back reaction with N02 (see text).

PAN loss rate (s"1)

FIGURE 6.19 Calculated first-order loss rates of PAN due to thermal decomposition, OH reaction, and photolysis as a function of altitude (assuming diurnally averaged actinic fluxes for 30°N, July 4) (adapted from Talukdar et al, 1995).

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