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Physical Sciences and Mathematics Commons™
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Oceanography and Atmospheric Sciences and Meteorology
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Articles 1 - 3 of 3
Full-Text Articles in Physical Sciences and Mathematics
Non-Methane Hydrocarbon Source Apportionment And Btex Risk Assessment Of Winter 2015 In Roosevelt, Utah, Jerimiah Lamb
Non-Methane Hydrocarbon Source Apportionment And Btex Risk Assessment Of Winter 2015 In Roosevelt, Utah, Jerimiah Lamb
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Non-Methane Hydrocarbons (NMHC) monitored in Roosevelt Utah including Benzene, Toluene, Ethylbenzene and Xylene (collectively known as BTEX) are associated with deleterious effects including cancer. This study was designed to assess the origin and effect of the toxicants and addressed two points: 1) Source identification using the USEPA’s Positive Matrix Factorization (PMF) and NOAA’s Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model and 2) A human health risk assessment based on ambient concentrations of BTEX collected at the Roosevelt site. Model fit indicated that the primary contributor to total NMHCs was local oil and gas operations and was supported by previous …
Design And Characterization Of A Time-Of-Flight Mass Spectrometer For Composition Measurements In The Upper Atmosphere, E. Addison Everett
Design And Characterization Of A Time-Of-Flight Mass Spectrometer For Composition Measurements In The Upper Atmosphere, E. Addison Everett
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The mesosphere/lower thermosphere (MLT) is perhaps the least understood region of Earth's atmosphere. Too high for balloons and winged aircraft, yet too low for satellites, direct access to the MLT to make in-situ measurements is via high-speed sounding rockets for brief periods of at most a few minutes. Mass spectrometers have previously been used to make composition measurements in this region. But, mass spectrometry in the MLT is difficult, mainly due to the ambient pressures here and also the high speeds and short flight durations of sounding rocket missions. Time-of-flight mass spectrometers (TOF-MS) are capable of making fast, accurate measurements …
Modeling And Projection Of The North American Monsoon Using A High-Resolution Regional Climate Model, Jonathan D.D. Meyer
Modeling And Projection Of The North American Monsoon Using A High-Resolution Regional Climate Model, Jonathan D.D. Meyer
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The North American Monsoon (NAM) is a dominant climate feature across the southwestern United States and Mexico during the summertime. Rainfall from the NAM elicits a significant response from the regional ecology as well as supports the socioeconomic well-being of both rural and urban populations. Due to the large variability in the yearly intensity and location of where the NAM rainfall occurs, the region is highly susceptible to prolonged and exceptional periods of drought; compounded by significant population growth projections through the 21st century. Reliable prediction for the NAM is highly beneficial on timescales ranging from shortterm weather forecasting to …