Identification

Title

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

Alternative title(s)

d789017

Abstract

<p>Goals:<br/> Study alpha-pinene + NO3 chemistry by injecting 150 ppb NO2 &amp; 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.</p> <p>Summary:<br/> 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.</p> <p>Organization: 2014 FIXCIT Study<br/> Lab Affiliation: California Institute of Technology<br/> Chamber: Seinfeld chambers</p> <p>Experiment Category: Gas phase chemical reaction<br/> Oxidant: Nitrate radical<br/> Reactants: ALPHA-PINENE, nitric oxide, OZONE, formaldehyde<br/> Reaction Type: Dark oxidation<br/> Relative Humidity: 5<br/> Temperature: 25<br/> Seed Name: Ammonium sulfate<br/> Pressure: 755</p>

Resource type

dataset

Resource locator

https://gdex.ucar.edu/datasets/d789017/

protocol: https

name: Dataset Description

description: Related Link

function: information

https://gdex.ucar.edu/datasets/d789017/dataaccess/

protocol: https

name: Data Access

description: Related Link

function: download

Unique resource identifier

code

codeSpace

Dataset language

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

environment

Keywords

Keyword set

keyword value

dataset

originating controlled vocabulary

title

reference date

date type

revision

effective date

2021-03-30

Keyword set

keyword value

LABORATORY > LABORATORY

originating controlled vocabulary

title

reference date

date type

revision

effective date

2025-10-03

Keyword set

keyword value

ICARUS > Integrated Chamber Atmospheric data Repository for Unified Science

originating controlled vocabulary

title

reference date

date type

revision

effective date

2025-10-03

Keyword set

keyword value

EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES

originating controlled vocabulary

title

reference date

date type

revision

effective date

2025-10-03

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

2014-01-13

End position

2014-01-13

Dataset reference date

date type

publication

effective date

2021-10-12

Frequency of update

notPlanned

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Creative Commons Attribution 4.0 International License

Limitations on public access

None

Responsible organisations

Responsible party

organisation name

email address

datahelp@ucar.edu

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

NSF NCAR Geoscience Data Exchange

email address

datahelp@ucar.edu

web address

https://gdex.ucar.edu

name: NSF NCAR Geoscience Data Exchange

description: The Geoscience Data Exchange (GDEX), managed by the Computational and Information Systems Laboratory (CISL) at NSF NCAR, contains a large collection of meteorological, atmospheric composition, and oceanographic observations, and operational and reanalysis model outputs, integrated with NSF NCAR High Performance Compute services to support atmospheric and geosciences research.

function: download

responsible party role

pointOfContact

Metadata date

2025-10-09T01:33:28Z

Metadata language