Identification

Title

ICARUS Chamber Experiment: Ziemann_20190320_Methyl nitrite/Nitric oxide/2-Decyl nitrate_Hydroxyl radical_DOS

Abstract

Goals: Determine SOA yield of OH radical oxidation of the VOC Summary: Experiments were performed at ambient temperature (?25°C) and pressure (?84?kPa) in an 8?m3 FEP Teflon environmental chamber. Purified air was supplied by AADCO clean air generators (<5?ppb hydrocarbons, and <1% RH). The chamber was first seeded with ?200?µg m?3 of either dioctyl sebocate (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 by flushing with 15?L min?1 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?min 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?×?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). Organization: Ziemann Lab Affiliation: University of Colorado, Boulder, Boulder, CO, USA Chamber: Janet (Chamber 1) Experiment Category: Gas phase chemical reaction, Photolysis, any phase, Aerosol formation Oxidant: Hydroxyl radical Reactants: Methyl nitrite, Nitric oxide, 2-Decyl nitrate Reaction Type: Photooxidation Relative Humidity: 1 Temperature: 25 Seed Name: DOS Pressure: 630

Resource type

dataset

Resource locator

https://gdex.ucar.edu/dataset/id/5951a953-0d27-4dc2-9451-a4acc5ad8725.html

protocol: https

applicationProfile: browser

name: ICARUS Chamber Experiment: Ziemann_20190320_Methyl nitrite/Nitric oxide/2-Decyl nitrate_Hydroxyl radical_DOS

description: Metadata 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

Keywords

Keyword set

keyword value

Dataset

originating controlled vocabulary

title

reference date

date type

revision

effective date

2014-10-16

Keyword set

keyword value

EARTH SCIENCE > ATMOSPHERE > AEROSOLS

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

originating controlled vocabulary

title

reference date

date type

revision

effective date

2018-03-15

Keyword set

keyword value

Other > Physical Models > Laboratory > Laboratory

originating controlled vocabulary

title

reference date

date type

revision

effective date

2018-03-15

Keyword set

keyword value

In Situ/Laboratory Instruments > Chemical Meters/Analyzers

originating controlled vocabulary

title

reference date

date type

revision

effective date

2018-03-15

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

2019-03-20

End position

2019-03-20

Dataset reference date

date type

publication

effective date

2022-01-07

date type

modified

effective date

2022-01-07

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

Compressed Archive File (application/zip)

version of format

Constraints related to access and use

Constraint set

Use constraints

Creative Commons Attribution 4.0 International License.

Limitations on public access

These data are openly accessible by all registered users. Accounts are available free of charge following the registration of user information with a valid email address.

Responsible organisations

Responsible party

organisation name

Ziemann

email address

marla.devault@colorado.edu

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact

organisation name

UCAR/NCAR - GDEX

email address

datahelp@ucar.edu

responsible party role

pointOfContact

Metadata date

2022-01-27T09:12:22-07:00

Metadata language