E&E - UBWOS 2012 Instruments

Measured Parameter Method Time Resolution Detection Limit Principal Investigator
NO, NO2, NOy, O3 Chemiluminescence, selective conversion 1 sec - 1 min 0.01-0.1 ppbv Eric Williams/John Holloway
NO, NO2, NO3, N2O5, O3 Cavity ring-down spectroscopy 1 sec 0.1 - 0.001 ppbv Steve Brown/Pete Edwards
HONO, NO2 Incoherent broadband absorption spectroscopy 1 min 0.2 ppbv Rebecca Washenfelder/Cora Young/Steve Brown
Acyl Peroxynitrates, Nitryl Chloride (ClNO2) Iodide ion chemical ionization mass spectrometry 1 - 5 sec 0.005 ppbv Jim Roberts
CO Vacuum UV fluorescence 1 min 2 ppbv Eric Williams/John Holloway
CO2 Infrared absorption 1 min 1 ppmv Eric Williams/John Holloway
CO2 and Methane Wavelength scanned cavity ring-down spectroscopy 1Hz every 5 sec 0.2 ppmv for CO2, 2 ppbv for CH4 Jeff Peischl/Tom Ryerson
SO2 UV fluorescence 1 min 0.1 ppbv Eric Williams/John Holloway
VOCs (see complete list below) In situ gas chromatography mass spectrometry 30 min 0.01 ppbv Jessica Gilman/Brian Lerner/Joost de Gouw
Formaldehyde, Oxygenates, Aromatics, Acetonitrile Proton-transfer reaction mass spectrometry 10sec - 1min 0.01 ppbv Felix Geiger/Carsten Warneke/Martin Graus/Joost de Gouw
Photolysis Rates Filter radiometry upwards/downwards 1 min Eric Williams/John Holloway
Meteorological Data Weather station 1 min Allen White
Boundary Layer Height, Vertical SODAR, Sonic anemometers 1 min Allen White
3-D Ozone Distribution Ozone Lidar 1 min 2 ppbv Christoph Senff/Raul Alvarez/Andy Langford
3-D Winds Mini MOPA Doppler Lidar 1 min Bob Banta/Alan Brewer/Mike Hardesty
O3, NO2, HONO, SO2, HCHO, NO3 Long Path - Differential Optical Absorption Spectroscopy (LP-DOAS) 5 mins 1ppb, 80ppt, 20ppt, 250ppt, 200ppt, 2ppt Jochen Stutz/ Max Spolaor
Acids: HNO3, HCl, HONO, HNCO, carboxylic acids, substituted phenols Negative ion proton transfer mass spectrometry 1 - 10 sec 0.01 ppbv Jim Roberts/Carsten Warneke/Martin Graus
Chemical Fluxes: HONO, NOx, O3, Other acids Eddy covariance, gradients w/ fast measurements, (see above) N/A Eric Williams/Jim Roberts
Size-Resolved Aerosol Surface Area SMPS, APS 15 min
Aerosol Chemical Composition Particle into Liquid Sampler (PiLS) 10 min Tim Bates/Trish Quinn
Snow Composition:Anions/Cations Ion chromatography N/A Trish Quinn/Tim Bates

Complete list of VOCs that will be quantified for Utah:

Ethane, Ethene, Propane, Propene, Ethyne, Butane_iso, Butane_n, Cyclopentane, Pentane_iso, Pentane_n, Hexane_n, Heptane, Octane, Nonane, Decane, Undecane

Benzene, Toluene, Benzene_135tm, Benzene_1ethyl, Xylenes_mp, Xylene_o, Benzene_vinyl (Styrene)

Acetaldehyde, Methanol, Propanal, Acetone, Ethanol, Furan, Propanol_iso, MEK, Butanol_1

Nitrate_1methyl, Nitrate_1ethyl, Nitrate_iPropyl, Nitrate_nPropyl

Isoprene, Pinene_beta, MACR, MVK, DMS (not likely that these compounds are very important to Utah) CF2Cl2, CCl4 (instrument diagnostics)

Likely additions for the Utah Ozone Study:

Butenes, Butadienes, Ethylene_oxide, Propylene_oxide, methane_thiol*, ethane_thiol, Acetonitrile, MTBE, Crotonaldehyde, 2-butoxyethanol*, Dimethyl_formamide (DMF)*, Benzaldehyde, Benzofuran, Benzonitrile, Benzyl chloride, Iso-propylbenzene (cumene), Acetophenone*, Other C9 and C10 aromatics, C4-alkylnitrates, C5-C7 aldehydes

*Never measured in ambient air by the GC-MS before, but should be detectable if they are present in appreciable quantities.

Non-detectable species on the GC-MS:

Glyoxal (measured by CARDS)
Formaldehyde and phenol (measured by PTR-MS)
Organic and inorganic acids (measured by NI-PT-CIMS)
Ethylene glycol