A study in progress near Seattle-Tacoma International Airport (SEATAC) found concencrated ultra-fine particulates (UFP) timed with overflights. That is, more paticulate density (measured in a mobile sensor array) as a jetliner passed overhead.
The data allows aviation-produced volumes to be stated as a percent of the total volume and refine exposure (dosage) to small areas for correlation with health statistics. Mobility also allows measuring under routes used in different "flow" and runway use configurations.
The SEATAC study also expanded the USC study around LAX, with similar results.
SMAAC Note: FAA flight recordings can count flights over a small area and use height and speed data to derive the UFP density over time. If UFP emissions by density were modeled in the International Noise Model based on the above findings, there would be a high correlation with noise exposure intensity on the ground. Since intensity (loudness) is expressed as an expotential function and density, weight and volume for particulates are linear:
1. There would be a correlation of high-DNL (or ldn) and a much higher UFP density at modeled points.
2. Per flight, UFP density at a lower DNL contour would be proportionally higher.
3. This means that UFP densities would coincide with DNL values as mapped but are more likely the cause of increased adverse health outcomes than noise intensity.
2009 US EPA Integrated Science Assessment
Evidence of UFP adverse health effects :
• Cardiovascular-related hospital admissions – Cardiovascular effects • Emergency department visits– Respiratory effects
• Changes in lung function
• Pulmonary inflammation
• Limited evidence for increases in emergency
department visits and hospital admissions