An Evaluation of the Contributions of Short and Long Range Pollutant Transport on Southern Ontario's Atmospheric Sulfur Content

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dc.contributor.advisorMcLaren, Robert
dc.contributor.authorPritchard-Oh, Austin Michael
dc.date.accessioned2023-08-04T15:04:55Z
dc.date.available2023-08-04T15:04:55Z
dc.date.issued2023-08-04
dc.date.updated2023-08-04T15:04:55Z
dc.degree.disciplineChemistry
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractSulfur dioxide (SO2), particle sulfate (p-SO4-2), and total sulfur (SOx) were evaluated at York University, in Toronto, Canada, using a ThermoFisher SO2 analyzer and an Aerodyne Aerosol Mass Spectrometer. These measurements were compared with a dataset from 2002-2020, which demonstrated a downward trend in atmospheric sulfur. Toronto’s atmospheric sulfur decline has plateaued in recent years. Current mean SO2 was 0.37 ppb, p-SO4-2 was 0.60 μg/m3, and SOx was 1.6 μg/m3. There were no significant seasonal or daytime/nighttime differences. The effects of pollutant transport and major contributors to Toronto’s sulfur were determined. Major contributors to SO2 included Hamilton metal refineries, Greater Toronto Area chemical production facilities, the Nanticoke petroleum refinery, and vehicle emissions. Major contributors to p-SO4-2 are Sarnia petroleum and chemical production, Sudbury metal refineries, and long-range transport from the Ohio River Valley. A field study mass-balance determination of Sarnia’s SO2 emissions was estimated at 0.18 tonnes/hr (4,300 kg/day).
dc.identifier.urihttps://hdl.handle.net/10315/41292
dc.languageen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectAtmospheric chemistry
dc.subjectEnvironmental science
dc.subjectAnalytical chemistry
dc.subject.keywordsAtmosphere
dc.subject.keywordsAtmospheric chemistry
dc.subject.keywordsAnalytical chemistry
dc.subject.keywordsEnvironment
dc.subject.keywordsSulfur
dc.subject.keywordsSulphur
dc.subject.keywordsSulfate
dc.subject.keywordsSulphate
dc.subject.keywordsParticle sulfate
dc.subject.keywordsSO2
dc.subject.keywordsSO4
dc.subject.keywordsSOx
dc.subject.keywordsToronto
dc.subject.keywordsYork University
dc.subject.keywordsPollution
dc.subject.keywordsChange in sulfur
dc.subject.keywordsPollutant transport
dc.subject.keywordsLong range
dc.subject.keywordsShort range
dc.subject.keywordsSarnia
dc.subject.keywordsOhio River Valley
dc.subject.keywordsPetroleum emissions
dc.subject.keywordsAerodyne
dc.subject.keywordsAMS
dc.subject.keywordsAerosol mass spectrometer
dc.subject.keywordsThermo Fisher
dc.subject.keywordsSO2 fluorescence
dc.titleAn Evaluation of the Contributions of Short and Long Range Pollutant Transport on Southern Ontario's Atmospheric Sulfur Content
dc.typeElectronic Thesis or Dissertation

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