Identification

Title

ICARUS Chamber Experiment: Ziemann_20180328_Methyl nitrite/Nitric oxide/4-Decyl nitrate_Hydroxyl radical_DOS

Alternative title(s)

d789273

Abstract

<p>Goals:<br/> Determine SOA yield of OH radical oxidation of the VOC</p> <p>Summary:<br/> Experiments were performed at ambient temperature (25 C) and pressure (84 kPa) in an 8 m^3 FEP Teflon environmental chamber. Purified air was supplied by AADCO clean air generators (&amp;lt; 5 ppb hydrocarbons, and &amp;lt; 1% RH). The chamber was first seeded with 200 ug/m^3 of either dioctyl sebacate (DOS) or dioctyl phthalate (DOP) polydisperse aerosol with peak particle diameter of 200 nm, which was added from an evaporation-condensation source. A measured mass of an alkyl nitrate was then added from a heated glass bulb using ultra-high purity (UHP) N2. Thermal decomposition was avoided by heating the bulb to only 65 C, well below the temperatures alkyl nitrates encounter during gas chromatographic analysis, and limiting the residence time in the gas phase to 1 s^-1 by flushing with 15 L/min of UHP N2. Glass bulbs containing a measured pressure of methyl nitrite or NO were prepared on a vacuum manifold and added to the chamber with UHP N2 in amounts sufficient to achieve concentrations of 5 ppm of each in the chamber. Reactions were initiated by turning on blacklights that are located on two sides of the chamber for 60 minutes at a light intensity corresponding to an NO2 photolysis rate constant of 0.37 min^-1. Under these conditions OH radicals were generated from the photolysis of methyl nitrite (Atkinson et al. 1981) with average concentrations of 3 x 107 molecules/cm^3, based on the amount of alkyl nitrate that reacted and an estimated rate constant for its reaction with OH radicals (Ziemann and Atkinson 2012).</p> <p>Organization: Ziemann<br/> Lab Affiliation: University of Colorado, Boulder, Boulder, CO, USA<br/> Chamber: Janet (Chamber 1)</p> <p>Experiment Category: Gas phase chemical reaction, Photolysis, any phase, Aerosol formation<br/> Oxidant: Hydroxyl radical<br/> Reactants: Methyl nitrite, Nitric oxide, 4-Decyl nitrate<br/> Reaction Type: Photooxidation<br/> Relative Humidity: 1<br/> Temperature: 25<br/> Seed Name: DOS<br/> Pressure: 630</p>

Resource type

dataset

Resource locator

https://gdex.ucar.edu/datasets/d789273/

protocol: https

name: Dataset Description

description: Related Link

function: information

https://gdex.ucar.edu/datasets/d789273/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

2018-03-28

End position

2018-03-28

Dataset reference date

date type

publication

effective date

2022-01-07

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

2025-10-09T01:40:17Z

Metadata language