ICARUS Chamber Experiment: Nguyen Group_20220525_Nitrogen Dioxide/Ammonium Sulfate/Ozone/Hydrogen Peroxide/beta-Pinene_Nitrate radical_Ammonium sulfate

d789110
| DOI: 10.5065/EBFK-CS78
 
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Abstract:

Goals:
To quantify SOA yield and gas-phase product yields (particularly of C10 nitrooxy-hydroperoxide and other organonitrates) from humid nighttime RO2+HO2-dominated NO3-initiated chemistry of b-pinene.

Summary:
The chamber was humidified, after which H2O2, NO2, and O3 were injected in the chamber and allowed to equilibrate, forming NO3 and HO2. Ammonium sulfate seed particles were injected. Then b-pinene was injected and decayed by simultaneous reaction with ozone and NO3. Gas phase organics were monitored by CF3O- CIMS (units: normalized counts), particle formation was monitored by SMPS, and RH / T / O3 / NOx were monitored throughout.

O3/NOx data sometimes require post-correction not applied here, including subtraction of an ozone interference from H2O2 (1 ppm H2O2 is detected as about 12 ppb ozone) and correction for an in-line HEPA filter (see timeline for applicable timing) that scrubs about 10% of NO2 and 45% of ozone.

CIMS ran out of reagent gas ~90 minutes before end of experiment.

Organization: Nguyen Group
Lab Affiliation: UC Davis
Chamber: Tran's big bag of air

Experiment Category: Gas phase chemical reaction, Aerosol formation
Oxidant: Nitrate radical
Reactants: Nitrogen Dioxide, Ammonium Sulfate, Ozone, Hydrogen Peroxide, beta-Pinene
Reaction Type: Dark oxidation
Relative Humidity: 67
Temperature: 22
Seed Name: Ammonium sulfate
Pressure: approximate 1 atm

Temporal Range:
2022-05-25 to 2022-05-25
Variables:
Nitrogen Dioxide
Vertical Levels:
See the detailed metadata for level information.
Data Types:
Platform_Observation
Data Contributors:
UC-DAVIS/CHEMISTRY
Department of Chemistry, University of California, Davis
Related Resources:
Icarus Dataset at UC-Davis
Total Volume:
0.17 MB
Data Formats:
ASCII (see dataset documentation)
Metadata Record:
Data License:
Data LicenseThis work is licensed under a Creative Commons Attribution 4.0 International License.
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