Type of Document Dissertation Author Augustine, Andrew Douglas Author's Email Address email@example.com URN etd-12152010-142448 Title An Assessment of Atmospheric Factors Impacting Tropospheric Ozone in the Baton Rouge, Louisiana, Non-attainment Zone Degree Doctor of Philosophy (Ph.D.) Department Geography & Anthropology Advisory Committee
Advisor Name Title Rohli, Robert V Committee Chair Brown, David P Committee Member Hsu, Shih A Committee Member Wang, Lei Committee Member Friedland, Carol Jean Dean's Representative Keywords
- air pollution
- synoptic climatology
Date of Defense 2010-12-07 Availability unrestricted AbstractBaton Rouge, Louisiana, is one of the metropolitan areas in the United States that currently does not meet the national ambient air quality standard for tropospheric ozone. In addition to petrochemical and other industrial activities, the climatological characteristics of the area meaningfully impact the development of tropospheric ozone. This research study attempts to assess factors contributing to elevated concentrations of tropospheric ozone.
Hourly observations of surface ozone concentrations were analyzed for eleven ambient air quality stations in the Baton Rouge metropolitan nonattainment zone (BRNAZ). Data covering a 15-year period, January 1993 – Dec 2007, was characterized according to varying temporal scales: annually, seasonally, monthly, and daily. Utilizing an environment-to-circulation approach, surface ozone concentrations were related to broad-scale steering circulation patterns.
The combination of principal components analysis and k-means cluster analysis enabled the 700 hPa geopotential height fields for 792 days which experienced elevated ozone (70 ppb) to be categorized into nine clusters, representing the major modes of synoptic variability related to surface ozone concentrations in the BRNAZ. Overall ozone forcing patterns were broadly determined to be synoptic subsidence, Gulf High, and non-meteorological related.
The third major component of this study involved a series of ozonesonde launches in the spring of 2006. The primary purpose of the launches was to investigate the diurnal variation in the vertical distribution of tropospheric ozone within the BRNAZ. The data collected indicated subsidence, radiational cooling, frontal passage, advection, and turbulent mixing influenced the development of tropospheric ozone.
Filename Size Approximate Download Time (Hours:Minutes:Seconds)
28.8 Modem 56K Modem ISDN (64 Kb) ISDN (128 Kb) Higher-speed Access AndrewDAugustine_diss.pdf 21.92 Mb 01:41:29 00:52:11 00:45:40 00:22:50 00:01:56
If you have questions or technical problems, please Contact LSU-ETD Support.