McNamara, Stephen M; Pratt, Kerri A (2020): 10-min averages of ambient ClNO2, N2O5, HNO3, and O3 measured at 12 m above ground level in Ann Arbor, Michigan, USA, from February 1 to March 10, 2016 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.912746
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Abstract:
These data represent continuous measurements of tropospheric nitryl chloride (ClNO2), dinitrogen pentoxide (N2O5), and nitric acid (HNO3) using chemical ionization mass spectrometry, and ozone (O3) using a chemiluminescence O3 monitor. The study was conducted from February 1 to March 10, 2016, at the University of Michigan in Ann Arbor, MI, USA. All measurements were conducted at 12 m above ground level.
Supplement to:
McNamara, Stephen M; Kolesar, K R; Wang, S; Kirpes, R M; May, Nathaniel W; Gunsch, M J; Cook, R D; Fuentes, J D; Hornbrook, R S; Apel, E C; China, S; Laskin, A; Pratt, Kerri A (in review): Observation of Road Salt Aerosol Driving Inland Wintertime Atmospheric Chlorine Chemistry. ACS Central Science
Related to:
Bertram, T H; Thornton, J A; Riedel, T P (2009): An experimental technique for the direct measurement of N2O5 reactivity on ambient particles. Atmospheric Measurement Techniques, 2(1), 231-242, https://doi.org/10.5194/amt-2-231-2009
Liao, Jingjuan; Sihler, H; Huey, L G; Neuman, J A; Tanner, D J; Frieß, Udo; Platt, U; Flocke, F M; Orlando, J J; Shepson, P B; Beine, Harry J; Weinheimer, A J; Sjostedt, S J; Nowak, J B; Knapp, D J; Staebler, Ralf M; Zheng, W; Sander, R; Hall, S R; Ullmann, K (2011): A comparison of Arctic BrO measurements by chemical ionization mass spectrometry and long path-differential optical absorption spectroscopy. Journal of Geophysical Research, 116, https://doi.org/10.1029/2010JD014788
McNamara, Stephen M; W Raso, Angela R; Wang, S; Thanekar, Sham; Boone, Eric J; Kolesar, K R; Peterson, Peter K; Simpson, William R; Fuentes, J D; Shepson, P B; Pratt, Kerri A (2019): Springtime Nitrogen Oxide-Influenced Chlorine Chemistry in the Coastal Arctic. Environmental Science & Technology, 53(14), 8057-8067, https://doi.org/10.1021/acs.est.9b01797
Thaler, Robert D; Mielke, Levi H; Osthoff, Hans D (2011): Quantification of Nitryl Chloride at Part Per Trillion Mixing Ratios by Thermal Dissociation Cavity Ring-Down Spectroscopy. Analytical Chemistry, 83(7), 2761-2766, https://doi.org/10.1021/ac200055z
Funding:
National Science Foundation (NSF), grant/award no. 1738588: Snowpack Chlorine Chemistry in Wintertime Urban Boundary Layer / AGS-1738588
Coverage:
Latitude: 42.278600 * Longitude: -83.736900
Date/Time Start: 2016-02-01T00:00:00 * Date/Time End: 2016-03-10T12:20:00
Minimum Elevation: 12.0 m * Maximum Elevation: 12.0 m
Event(s):
Comment:
CIMS-specific parameters (Mc Namara et al, 2019):
- Average CIMS sensitivity to Cl2 (as I(Cl2)- at m/z 197): 3.0 ± 0.4 Hz/ppt (note a)
- Relative sensitivity factors used (all relative to I(Cl2)- sensitivity at m/z 197): I(35ClNO2)- (m/z 208): 3.7 ± 0.4 (note b), I(N2O5)- (m/z 235): 0.85 ± 0.08 (note c), I(HNO3)- (m/z 190): 2.3 ± 0.5 (note d)
- Detection limits (corresponding to 2 min background periods), campaign average: ClNO2: 0.9 ppt, N2O5: 4 ppt, HNO3: 34 ppt
- Sampling line loss correction, to account for wall losses of ClNO2, N2O5, and HNO3 within the sampling line, was applied to the ambient CIMS data as follows: ClNO2: +20%, N2O5: +14%, HNO3: +3%
Calibration:
- Note a: Cl2 calibrations were performed every 2 h during the campaign by adding Cl2 from a permeation source (VICI Metronics), in N2, to the CIMS inlet air flow. Characterization of the permeation source was completed via the absorption method described by Liao et al (2011). All other species were calibrated offline relative to Cl2 (noted above).
- Note b: ClNO2 was synthesized similarly to Thaler et al (2011) and quantified by thermal dissociation to NO2.
- Note c: N2O5 was synthesized similarly to Bertram et al (2009) and quantified via measurement of NO2.
- Note d: HNO3 was obtained using a permeation source (VICI Metronics) and quantified via measurement of NO3- using ion chromatography (McNamara et al, 2019).
Background measurements were performed every 15 min by passing the air flow through a scrubber containing glass wool and stainless steel wool, heated to 120°C (McNamara et al, 2019).
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Pratt, Kerri A | Geocode – Eastern Standard Time, UTC-5h | ||
| 2 | Nitryl chloride | ClNO2 | pptv | Pratt, Kerri A | Chemical Ionization mass spectrometer (CIMS), THS Instruments, reagent ion I(H2O)n- | |
| 3 | Nitryl chloride, uncertainty | ClNO2 unc | pptv | Pratt, Kerri A | Chemical Ionization mass spectrometer (CIMS), THS Instruments, reagent ion I(H2O)n- | |
| 4 | Dinitrogen pentoxide | N2O5 | pptv | Pratt, Kerri A | Chemical Ionization mass spectrometer (CIMS), THS Instruments, reagent ion I(H2O)n- | |
| 5 | Dinitrogen pentoxide, uncertainty | N2O5 unc | pptv | Pratt, Kerri A | Chemical Ionization mass spectrometer (CIMS), THS Instruments, reagent ion I(H2O)n- | |
| 6 | Nitric acid | HNO3 | pptv | Pratt, Kerri A | Chemical Ionization mass spectrometer (CIMS), THS Instruments, reagent ion I(H2O)n- | |
| 7 | Nitric acid, uncertainty | HNO3 unc | pptv | Pratt, Kerri A | Chemical Ionization mass spectrometer (CIMS), THS Instruments, reagent ion I(H2O)n- | |
| 8 | Ozone mixing ratio | O3 mix ratio | ppbv | Pratt, Kerri A | Chemiluminescence O3 monitor, 2B Technologies model 205 dual-beam |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
38355 data points
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