Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Engineering
Effects Of 2000-2050 Global Climate Change On Ozone And Particulate Matter Air Quality In The United States Using Models-3/Cmaq System, Yun-Fat Lam
Doctoral Dissertations
The Models-3/Community Multi-scale Air Quality modeling system (CMAQ), coupled with Goddard Institute for Space Studies (GISS) atmospheric General Circulation Model (GCM), fifth Generation Mesoscale Model system (MM5), and Goddard Earth Observing System-CHEMistry (GEOS-Chem), was used to simulate atmospheric concentration of ozone and particulate matter over the continental United States 12-km and 36-km (CONUS) domains at year 2000 and year 2050. In the study, GISS GCM model outputs interfaced with MM5 were utilized to supply the current and future meteorological conditions for CMAQ. The conventional CMAQ profile initial and boundary conditions were replaced by time-varied and layer-varied GEOS-Chem outputs. The future …
Improving Ozone Sip Modeling In Complex Terrain At A Fine Grid Resolution, Yunhee Kim
Improving Ozone Sip Modeling In Complex Terrain At A Fine Grid Resolution, Yunhee Kim
Doctoral Dissertations
Meteorological variables such as temperature, wind speed, wind directions, and Planetary Boundary Layer (PBL) heights have critical implications for air quality simulations. Sensitivity simulations with five different PBL schemes associated with three different Land Surface Models (LSMs) were conducted to examine the impact of meteorological variables on the predicted ozone concentrations using the Community Multiscale Air Quality (CMAQ) version 4.5 with local perspective. Additionally, the nudging analysis for winds was adopted with three different coefficients to improve the wind fields in the complex terrain at 4-km grid resolution. The simulations focused on complex terrain having valley and mountain areas for …
Impact Of Ground-Level Aviation Emissions On Air Quality In The Western United States, Eric Edward Clark
Impact Of Ground-Level Aviation Emissions On Air Quality In The Western United States, Eric Edward Clark
Boise State University Theses and Dissertations
The aviation industry has experienced sustained growth since its inception result- ing in an increase in air pollutant emissions. Exposure to particulate matter less than 2.5 µm in diameter (PM2.5) has been linked to respiratory health problems because it penetrates deepest into human lungs.
This thesis focused on the concentrations of three secondary aerosol species (i.e., sulfate, nitrate + ammonium and organic carbon) as they relate to the formation of total PM2.5. There were three goals of this research: evaluate differences in total PM2.5 concentration as (1) ground-level aviation emissions (i.e., up to 3,000 …