Diurnal Statistics for Temperature, Relative Humidity, Wind Speed, PM10, and PM2.5 Concentrations at ’A’ą̈y Chù’ Valley in Kluane National Park, Yukon, Canada for June 2021

Diurnal Statistics for Temperature, Relative Humidity, Wind Speed, PM10, and PM2.5 Concentrations at ’A’ą̈y Chù’ Valley in Kluane National Park, Yukon, Canada 2021. GPS Coordinates for Site are 60°59'55.25"N, 138°31'24.05"W. Sampling conducted from June 4th to July 2nd, 2021

PM measurements: Two Multichannel Optical Particle Counters (OPC; Fast-Response Multichannel Monitor, FAI Instruments) were used to measure the size distribution and concentrations of the PM during the campaign. The OPC inlet heights were matched to the ARA N-FRM sampler inlet heights. Particles of diameters between 0.28 and 10 µm were measured at an initial time resolution of 4 Hz and a flow rate of 1 L min−1. Dilution with filtered air at a 6:1 ratio was used to avoid saturation of the detector during dusty periods.

Meteorological Measurements: Wind speed and direction was measured throughout the campaign using cup anemometers equipped with wind vanes (NRG 40C) at various heights between ground level and 10 m, averaged to 10-minute resolution. The data used for the purposes of this publication was measured by an anemometer positioned between 2.5 and 4.7 m above ground during the reported measurement period. The height of the anemometer was adjusted at times to account for sand dunes migrating in the sampling site. Temperature and RH were measured throughout the campaign using digital air temperature and RH sensors (Campbell CS215) at 1.3 m off the ground.