2026-09-19T01:18:18Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/1140942026-06-16T17:24:36Zcom_1721.1_7582com_1721.1_7581col_1721.1_131024
Noelle Eckley Selin.
Rider, Elizabeth Ndayu
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences.
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences
n-us-il
2018-03-12T19:29:38Z
2018-03-12T19:29:38Z
2017
2017
http://hdl.handle.net/1721.1/114094
1027220301
Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2017.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 21-24).
To quantify the effects of the NO, SIP call in urban and rural locales, surface ozone data from the Air Quality System is analyzed. Methods from extreme value theory are applied to calculate and compare 20-year return levels at 5 urban and 17 rural/suburban sites in Illinois based upon maximum daily 8-. hour average ozone concentrations from summer (JJA) for two periods (1992- 2002 and 2003-2013) and a threshold of 70 (ppb). Between the two periods, 21 out of 22 sites experienced a decrease in 20-year return levels. The magnitude of these decreases does not indicate a strong correlation between population density and air quality improvements, however, further analysis is required.
by Elizabeth Ndayu Rider.
S.B.
39 pages
eng
Massachusetts Institute of Technology
MIT theses are protected by copyright. They may be viewed, downloaded, or printed from this source but further reproduction or distribution in any format is prohibited without written permission.
http://dspace.mit.edu/handle/1721.1/7582
Earth, Atmospheric, and Planetary Sciences.
Air quality applications of extreme value theory : return levels of extreme ozone events in Chicago and surrounding areas
Thesis
application/pdf
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Publication
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