Table 1. Instruments at Downtown Sites (CTC, NCore)a.
| measurement | instrument PI/Ref. |
|---|---|
| Particulate Matter | |
| Real-time nonrefractory PM composition via ACSM at Ncore | Weber, GT/Mao, UAF126 |
| PM2.5, PM10 via BAM, PM2.5 speciation on 24-h filters | ADEC at NCORE |
| PM2.5 absorption at 7 wavelengths via Magee Scientific AE-33 Aethalometer | Mao, UAF |
| Real-time nonrefractory PM composition via HR-ToF-AMS | D’Anna/Temime-Roussel, LCE, France59,62 |
| Particle organic composition via CHARON PTR-ToF-MS | |
| Nitrate multi-isotopic analysis (δ15N, δ17O, δ18O) via high-volume PM sampler, and aerosol composition | Albertin/Bekki/Savarino, LATMOS/IGE127 |
| PM absorption and scattering (401, 870 nm; black carbon & brown carbon) via PAX | Yokelson, U. Montana60 |
| PM absorption at 405, 515, 660, and 785 nm, via PAAS-4λ | Schnaiter, KIT, Germany61 |
| Inorganic ion composition via PILS-IC | Weber, GT/Mao, UAF64 |
| Total ammonia (soluble gas plus PM NH4+) via mist chamber | Weber, GT65 |
| Size-resolved sulfate isotopes via high-volume PM sampler | Alexander, U. Washington128 |
| Particulate mass and elemental composition via EDXRF | Creamean, CSU129 |
| Particle Ice nucleation measurements, on and offline | Creamean, CSU71,72 |
| Offline single-particle morphology and elemental composition via computer controlled-scanning electron microscopy with energy dispersive X-ray (CCSEM-EDX) spectroscopy of MOUDI samples (0.18–18 μm) | Pratt, UMich.69,70 |
| Water-soluble ions in bulk aerosol (total PM) via filter/IC | Dibb, UNH130 |
| PM size distributions, total PM number concentration, black carbon in PM1 | D’Anna/Temime-Roussel, LCE, France |
| Size resolved water-soluble ions and metals via MOUDI and PM2.5 filters | Weber, GT84 |
| Photooxidant production in PM2.5 from filters | Anastasio, UCD131−133 |
| Particle water via wet/dry optical particle counters | Weber, GT134 |
| Gases | |
| Volatile organic compounds/via CHARON PTR-ToF-MS | D’Anna, France62 |
| Reactive gases: O3, SO2, CO, NOx | Simpson, UAF36 |
| High precision CO | Hu, U. Montana135 |
| NO2 multi-isotopic analysis (δ15N, δ17O, δ18O) via denuder gas sampling | Albertin/Bekki/Savarino, LATMOS/IGE136 |
| Formaldehyde (HCHO) via COFFEE and Aeris instruments. | St. Clair, UMBC63,137 |
| CO2, H2O via LiCor analyzer | Brus, FMI, Finland |
| Meteorological Measurements | |
| Temperature gradient (3m, 6m, 11m, 23m on CTC roof), winds on CTC roof | Simpson, UAF36 |
| Photolysis rate measurements for NO2 and other gases via radiometers | Flynn, U. Houston |
| Wind Lidar profiling (first half of study) | Dieudonné, LPCA/UCLO, France |
| Snow sampling | |
| Snow ionic composition, surface and pits | Dibb, UNH138 |
| Nitrate multi-isotopic analysis (δ15N, δ17O, δ18O) in snow samples | Albertin/Bekki/Savarino, LATMOS/IGE, France |
| Ionic composition, metals, and organic tracers in snow samples | Scoto, Italy75,76 |
a
The reference is for the technique used.