E&E - UBWOS 2014 Instruments
Measured Parameter | Method | Time Resolution | Detection Limit | Principal Investigator |
---|---|---|---|---|
NO, NO2, NO3, N2O5, NOy, O3 | Cavity ring-down spectroscopy | 1 sec | 0.1 - 0.001 ppbv | Steve Brown/Rob Wild |
NO, NO2, NOy fluxes | Photolytic, thermal conversion, chemiluminescence | 1-10 sec | 10 - 100 pptv | Jennifer Murphy |
HONO, NO2 | Incoherent broadband absorption spectroscopy, ACES | 1 min | 0.2 ppbv | Steve Brown/Kyung-Eun Min |
HONO | Long Path Absorption Photometer | 3 min | 10 pptv | Barry Lefer/James Flynn/Sergio Alvarez |
Acyl Peroxynitrates, Nitryl Chloride (ClNO2), HONO, HO2NO2 | Iodide ion chemical ionization mass spectrometry | 1 - 5 sec | 0.005 ppbv | Patrick Veres/Jim Roberts |
CO2 and Methane (CH4) | Wavelength scanned cavity ring-down spectroscopy | 1Hz every 5 sec | 0.2 ppmv for CO2, 2 ppbv for CH4 | Jim Roberts |
O3 | UV Absorption | 10 sec | 1 ppbv | Jim Roberts |
SO2 | UV fluorescence | 1 min | 0.1 ppbv | Jim Roberts |
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 / ToF | 10 sec - 1 min | 0.01 ppbv | Carsten Warneke/Joost de Gouw/Rui Li/Shoa-Meng Li |
HCHO | Liquid scrubber Hantzsch Reaction | 1 min | 100 pptv | Barry Lefer/James Flynn/Sergio Alvarez |
O3, NO2, HONO, SO2, HCHO, NO3 | Long Path - Differential Optical Absorption Spectroscopy (LP-DOAS) | 5 min | 1ppb, 80ppt, 20ppt, 250ppt, 200ppt, 2ppt | Jochen Stutz/Catalina Tsai |
Acids: HNO3, HCl, HONO, HNCO, carboxylic acids, substituted phenols | Negative ion proton transfer mass spectrometry / ToF | 1 - 10 sec | 0.01 ppbv | Bin Yuan/John Liggio |
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 | |
Aerosol and Snow Nitrate Isotopes | Isotope Mass Spectrometry | N/A | Becky Alexander | |
Photolysis Rates | Spectral radiometry | 1 min | Hans Osthoff | |
Photolysis Rates | Broadband radiometry upwards/downwards | 1 min | Bob Zamora | |
Meteorological Data | Weather station | 1 min | Allen White | |
Boundary Layer Height, Vertical | SODAR, Sonic anemometers | 1 min | Allen White |
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
Formaldehyde and phenol (measured by PTR-MS)
Organic and inorganic acids (measured by NI-PT-CIMS)
Ethylene glycol