Chen Wangchun

Date of Award

12-2001

Degree Name

Master of Arts

Department

Chemistry

First Advisor

Dr. Steven Bertman

Second Advisor

Dr. Donald Schreiber

Third Advisor

Dr. Subra Muralidharan

Access Setting

Masters Thesis-Open Access

Abstract

Simultaneous measurements of PAN, PPN and MPAN were made during the SOS 1999 Nashville campaign at Dickson site. The PANs data at this site were rich and complex. PAN and MP AN showed obvious diurnal change but PPN did not during this period. PAN and ozone have a clear positive relationship. Due to the special location of the site, winds from different directions bring anthropogenic hydrocarbons (AHCs) or biogenic hydrocarbons (BHCs) to the site. The data showed that the influence of AHCs and BHCs on PANs compounds varied on different days. Average values of PAN/PPN and PAN/MPAN from MLR may be interpretable regionally to use to calculate the contribution of AHC and BHC on the formation of ozone. But care must be taken to consider the contribution on individual days because of the variance in the ratio of PAN/PPN in AHC condition. The ratio of PAN/MP AN in BHC condition is more complicated. The ratio may be influenced by NOx and OH• level. No characteristic ratio is applicable in different complicated BHC conditions.

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