JSM 2005 - Toronto

Abstract #304605

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Legend: = Applied Session, = Theme Session, = Presenter
Activity Number: 495
Type: Contributed
Date/Time: Thursday, August 11, 2005 : 8:30 AM to 10:20 AM
Sponsor: Social Statistics Section
Abstract - #304605
Title: Comparison of Spatial Characteristics of Local Air Quality Reported Using the Air Quality Index in the State of North Carolina of 1999 and 2004
Author(s): Kuo-Ping Li*+ and Chirayath Suchindran
Companies: University of North Carolina, Chapel Hill and University of North Carolina, Chapel Hill
Address: CB# 7420, McGavran-Greenberg Hall, Chapel Hill, NC, 27599-7420, United States
Keywords: spatial statistics ; air quality index ; clustering ; spatial analysis
Abstract:

Many regions in North Carolina were affected by the economic downturn following the boom in the 1990s. It is interesting to see how this would affect local air quality. In this study, we used the EPA's Air Quality Index (AQI) as the indicator of air quality. The ratio of days with a "good" AQI was computed for North Carolina counties for 1999 and 2004. The spatial correlation of these ratios were analyzed. An increase in the degree of spatial clustering of "good" counties within a range of 50 km was observed. Possible factors contributed to this increase are investigated.

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