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