2021 Summer Undergraduate Research Program (SURP) Symposium

Location

Ballroom, Maucker Student Union, University of Northern Iowa

Presentation Type

Poster Presentation (UNI Access Only)

Document Type

poster

Abstract

The atmospheric mixed layer is the near-surface layer of air directly impacted by processes at the earth's surface, including the emission of air pollution. The dispersion and resulting concentration of pollutants within the atmosphere are affected by the depth of the atmospheric mixed layer. Sources of particulate matter with an aerodynamic diameter of 2.5 microns and smaller (PM2.5) include both natural (e.g., fugitive dust) and anthropogenic (e.g., fossil fuel combustion) emissions. Twenty-four-hour average concentrations of PM2.5 above 35.5 µg/m^3 are detrimental to human health and can affect lung and heart function. Other effects of particulate pollution include poor visibility and changes to atmospheric reflectance. This study evaluates the relationship between mixed layer depth and exceedances of the 24-hour National Ambient Air Quality Standards (NAAQS) in Iowa for 2012-2015.

Start Date

30-7-2021 11:30 AM

End Date

30-7-2021 1:15 PM

Event Host

Summer Undergraduate Research Program, University of Northern Iowa

Faculty Advisor

Alan Czarnetzki

Department

Department of Earth and Environmental Sciences

File Format

application/pdf

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Jul 30th, 11:30 AM Jul 30th, 1:15 PM

Structure of the Atmospheric Boundary Layer During PM2.5 NAAQS Exceedances in Iowa

Ballroom, Maucker Student Union, University of Northern Iowa

The atmospheric mixed layer is the near-surface layer of air directly impacted by processes at the earth's surface, including the emission of air pollution. The dispersion and resulting concentration of pollutants within the atmosphere are affected by the depth of the atmospheric mixed layer. Sources of particulate matter with an aerodynamic diameter of 2.5 microns and smaller (PM2.5) include both natural (e.g., fugitive dust) and anthropogenic (e.g., fossil fuel combustion) emissions. Twenty-four-hour average concentrations of PM2.5 above 35.5 µg/m^3 are detrimental to human health and can affect lung and heart function. Other effects of particulate pollution include poor visibility and changes to atmospheric reflectance. This study evaluates the relationship between mixed layer depth and exceedances of the 24-hour National Ambient Air Quality Standards (NAAQS) in Iowa for 2012-2015.