Identification

Title

ICARUS Chamber Experiment: 2014 FIXCIT Study_20140124_4-hydroxy-3-nitrooxy ISOPN/Methyl nitrite/nitric oxide/_Hydroxyl radical_Ammonium sulfate_4,3-isoprene hydroxynitrate + OH, high NO, 50% RH, (NH4)2SO4 seed

Alternative title(s)

d789019

Abstract

<p>Goals:<br/> To observe the products of 4-OH-3-ONO2-ISOPN + OH oxidation in the presence of wet ammonium sulfate seeds. In particular, we would like to achieve a constraint on the yield of the dihydroxydinitrate (DHDN) product. In addition to DHDN, expected products include C4-hydroxy-carbonyl nitrate (MVKN, MW = 149), formaldehyde, hydroxyacetone, and glycolaldehyde.</p> <p>We also explored GTHOS OH interference at the end of the experiment. We conclusively saw increasing interference once NO was titrated out of the bag, and significant amounts of ozone were present. It scaled with ozone addition.</p> <p>Summary:<br/> John Crounse successfully separated most of the hexanes/ethyl acetate from a synthesized sample of 4,3 ISOPN. RH was added to the bag to 55%. GHTOS managed to grab a humid background, which is key. Isoprene hydroxy nitrate was successfully added to the bag. No impurities were noticed on the GC from the 4,3 ISOPN standard. Lights were turned on (we should do it off-hour so that NO-CL can measure right when lights turn on/off). Mostly the methylvinylketone nitrate (MVKN, MW = 149) was made. AMS noticed about 4 ug/m^3 of organic mass, and TD-LIF reported ~70ppt of aerosol particles. After about 2 hours, oxidation significantly slowed down. When 100% lights on, oxidation sped up a bit, but leveled off, as did NO concentration, indicating a lack of OH. Potentially significant photolysis of M-234 was noticed.</p> <p>When lights were turned off, everything stabilized. There was enough NO to completely titrate the roughly 20ppb O3 that had formed during the experiment. After lights off, multiple levels of O3 were added to the bag to explore the OH interference question.</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, Aerosol formation<br/> Oxidant: Hydroxyl radical<br/> Reactants: 4-hydroxy-3-nitrooxy ISOPN, Methyl nitrite, nitric oxide<br/> Reaction Type: Photooxidation<br/> Relative Humidity: 52<br/> Temperature: 26<br/> Seed Name: Ammonium sulfate<br/> Pressure: 750 Torr</p>

Resource type

dataset

Resource locator

https://gdex.ucar.edu/datasets/d789019/

protocol: https

name: Dataset Description

description: Related Link

function: information

https://gdex.ucar.edu/datasets/d789019/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

2014-01-24

End position

2014-01-24

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

2025-10-09T01:32:57Z

Metadata language