Measurements of peroxycarboxylic nitric anhydrides (= PAN, PPN, MPAN) and aldehydes (acetaldehyde, propanal, and methacrolein) were made at Nashville, Tennessee, in 1999 and Houston, Texas, in 2000. The data were interpreted with a sequential reaction model that included reaction of aldehydes with hydroxl radical and formation or loss of PANs mediated by peroxyacyl radicals. The comparison of the measured ratios with those predicted by the model showed disagreement for PAN/acetaldehyde and PPN/propanal in Nashville but agreement in Houston. These features are consistent with the relative importance of isoprene to PAN formation at each site.
Revised: November 10, 2005 |
Published: December 15, 2001
Citation
Roberts J.M., C. Stroud, B.T. Jobson, M. Trainer, D. Hereid, E.J. Williams, and F.C. Fehsenfeld, et al. 2001.Application of a Sequential Reaction Model to PANS and Aldehyde Measurements in Two Urban Areas.Geophysical Research Letters 28, no. 24:4583-4586.PNNL-SA-40553.