The Mobile Observations of Ultrafine Particles (MOV-UP) Study: Winter 2018 Sampling

The Mobile ObserVations of Ultrafine Particles (MOV-UP) Study is a two-year project intended to quantify air quality impacts of air traffic for communities located near, and below the flight paths of the SeaTac airport. The study aims to assess ultrafine particle concentrations within 10 miles of the airport in the directions of aircraft take-offs and landings over the course of 4 seasons. To date, sampling has been completed for Winter 2018. Over this time period, 16 days of mobile sampling were conducted using a suite of mobile instruments capable of detecting particles between 10-20, 20-36 and >36 nm in diameter on a 10 second time-scale. Black carbon (BC) particle concentration was collected on the 10 second scale as well as the full range of particle size distribution from 10 nm to 1 µm on the 1 minute time scale. The mean wind direction during the drives was from the SW. There were two days with wind from the NW, which resulted in reversal of the landing and take-off direction at the airport. A v...