COVID-AQS 2020 Instruments

InstrumentSpecies MeasuredPI
Los Gatos Research (LGR) N2O/CO Analyzer using cavity enhanced absorption CO, H2O, N2O Jeff Peischl
GC-MS Gas Chromatography-Mass Spectrometry Saturated, unsaturated, and oxygenated hydrocarbons, alkyl nitrates, other volatile organic compounds Jessica Gilman
PTR-ToF-MS Proton transfer reaction time of flight mass spectrometer Volatile Organic Compounds (VOCs) Matt Coggon/Carsten Warneke
NO_LIF Laser induced fluorescence measurement of nitric oxide NO Drew Rollins
NOx Chemiluminescence Thermo Scientific model 42i with custom blue light converter NOx = NO + NO2 Steve Brown / Delphine Farmer (CSU)
O3 UV photometer Thermo Scientific model 49c O3 Steve Brown / Eric Williams
Picarro Cavity ring-down spectroscopy CO2, CH4 Jeff Peischl
AMS Aerosol Mass Spectrometer PM 1 composition Ann Middlebrook
UHSAS Ultra-High Sensitivity Aerosol Spectrometer Aerosol concentration in the 0.07-1.0 µm diameter range Ann Middlebrook
POPS Printed Optical Particle Spectrometer Total aerosol size distributions 0.14 - 2.5 µm (or micron) Lizzy Asher / Troy Thornberry

The CSL TOPAZ lidar measures ozone (O3) mixing ratio and aerosol backscatter vertical profiles from near the surface to 6-8 km above ground level (AGL) every 8 minutes. The lidar also measures the same parameters along a horizontal path over south-central Boulder. Currently, TOPAZ measurements are performed usually twice per week on clear or partly cloudy days, for several hours each. In addition, surface O3 and temperature, humidity, wind speed and direction, as well as barometric pressure are measured continuously from the TOPAZ truck.

TOPAZ and met station/O3 monitor data archives are available.

Continuous Scanning Doppler Lidar measurements are being made from the third floor of DSRC. These measurements provide estimates of mixed layer height and horizontal wind profiles every 15 minutes. Doppler lidar wind and mixing height observations provide information on transport patterns and the depth of the volume that O3 precursors are mixed into. In addition, spatially resolved, nearly horizontal, scanning data can be used to determine airmass trajectories for in-situ sensors.

Doppler data (MicroDop data and Dalek data) are available real-time.