ICARUS Chamber Experiment: 2014 FIXCIT Study_20140113_ALPHA-PINENE/nitric oxide/OZONE/formaldehyde_Nitrate radical_Ammonium sulfate_HO2 fate, dry RH, seed added at end

Goals:; Study alpha-pinene + NO3 chemistry by injecting 150 ppb NO2 & 75 ppb O3, plus HCHO. Run the experiment so as to optimize for the formation of the nitrooxyhydroperoxide (MW = 231), which we detected during SOAS and to prevent the dominance of RO2 + RO2 reactions. We will see if we can better understand the gas phase nitrate yields from alpha-pinene nighttime chemistry when we run the experiment in a more atmospherically relevant way than has been done in the past. We will also inject ammonium sulfate seed at the end of the experiment to see, which and to what degree, the gas phase nitrates partition into the particle phase.

Summary:; We formed a very high yield of nitrooxyhydroperoxide. In fact most of the other masses detected by the CF3O- CIMS were significantly smaller. After the nitrooxyhydroperoxide signal began to level out, we ramped the temperature to determine if any species came off the walls. The signal for the nitrooxyhydroperoxide and other signals did increase, but not substantially. We then cooled the chamber and injected seed. There was uptake seen by the AMS (~10 ug/m^3). At the very end we turned on lights, and saw the nitrooxyhydroperoxide signal increase instead of decay. There was still alpha-pinene left unreacted at this point as confirmed via the PTR-MS. O3 increased to around ~500 ppb over only 30 minutes after lights turned on, so likely this provided enough NO3 to be competitive with OH.

Organization: 2014 FIXCIT Study; Lab Affiliation: California Institute of Technology; Chamber: Seinfeld chambers

Experiment Category: Gas phase chemical reaction; Oxidant: Nitrate radical; Reactants: ALPHA-PINENE, nitric oxide, OZONE, formaldehyde; Reaction Type: Dark oxidation; Relative Humidity: 5; Temperature: 25; Seed Name: Ammonium sulfate; Pressure: 755

To Access Resource:

Questions? Email Resource Support Contact:

  • Bob Dattore
    dattore@ucar.edu
    UCAR/NCAR - Research Data Archive

Temporal Range

  • Begin:  2014-01-13
    End:  2014-01-13

Keywords

Resource Type dataset
Temporal Range Begin 2014-01-13
Temporal Range End 2014-01-13
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
Related Links

Related Resource #1 : ICARUS Dataset at UC-Davis

Additional Information N/A
Resource Format ASCII
Standardized Resource Format ASCII
Asset Size 0.00 MB
Legal Constraints

Creative Commons Attribution 4.0 International License


Access Constraints None
Software Implementation Language N/A

Resource Support Name Bob Dattore
Resource Support Email dattore@ucar.edu
Resource Support Organization UCAR/NCAR - Research Data Archive
Distributor NCAR Research Data Archive
Metadata Contact Name N/A
Metadata Contact Email rdahelp@ucar.edu
Metadata Contact Organization NCAR Research Data Archive

Author Wennberg, Paul O.
Seinfeld, John H.
Crounse, John D.
Nguyen, Tran B.
Publisher Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory
Publication Date 2021-10-12
Digital Object Identifier (DOI) https://doi.org/10.5065/bj92-0x12
Alternate Identifier d789017
Resource Version N/A
Topic Category environment
Progress completed
Metadata Date 2025-06-18T01:05:01Z
Metadata Record Identifier edu.ucar.rda::d789017
Metadata Language eng; USA
Suggested Citation Wennberg, Paul O., Seinfeld, John H., Crounse, John D., Nguyen, Tran B.. (2021). ICARUS Chamber Experiment: 2014 FIXCIT Study_20140113_ALPHA-PINENE/nitric oxide/OZONE/formaldehyde_Nitrate radical_Ammonium sulfate_HO2 fate, dry RH, seed added at end. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://doi.org/10.5065/bj92-0x12. Accessed 18 June 2025.

Harvest Source