’95-’99 AM NMOC/NOy Ratios for the
Plaza Monitoring Site
0
5
10
15
20
1994
1995
1996
1997
1998
1999
2000
NMOC/NO
y
NO
x
Limited
VOC Limited
From Perry,
JL and Owens, PM, “Weekday/Weekend Variability and Long-Term Trends in
Traffic, CO, NOy, and Ozone for
the Charlotte Metropolitan Area during the 1990's, AWMA, June 2001