Identification

Title

ICARUS Chamber Experiment: 2014 FIXCIT Study_20140121_ISOPRENE/hydrogen peroxide_Hydroxyl radical_No Seed_Isoprene + OH, low NO, dry, no seeds, lower initial concentration

Alternative title(s)

d789025

Abstract

<p>Goals:<br/> Study isoprene low NO chemistry. The experiment will be similar to the experiment run on 01/02/2014, but the loading will be lower, so as to limit RO2 + RO2 chemistry.</p> <p>Summary:<br/> We injected isoprene initially and like the experiment run on 01/19/2014 there was ISOPOOH contamination during the injection. We decided given the goals of the experiment to flush the bag for several hours to remove the ISOPOOH. After several hours of flushing the ISOPOOH was roughly around 200 ppt (see the worked up data for a more precise number). The source of contamination was found, and everything was cleaned again. No ISOPOOH was injected during the second injection of isoprene. Because we started the experiment later (i.e., after rush hour), the NO background was a lot lower than previous experiments (~10 ppt in the beginning). The lower isoprene loading in this experiment allowed for the HO2 pathway to dominate over the RO2 pathway and allowed for later generation products to form. During the experiment we saw ISOPOOH form and decay away. Unexpectedly IEPOX also formed and decayed away. There seemed to be a lower than expected amount of IEPOX formed. Perhaps wall loss was greater in this experiment than on 01/02/2014. For the PTR-MS and GC-FID, we trapped ISOPOOH/IEPOX at -40 C, so that yields of MVK and MACR for the experiment could be determined without the ISOPOOH/IEPOX interference.</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: Hydroxyl radical<br/> Reactants: ISOPRENE, hydrogen peroxide<br/> Reaction Type: Photooxidation<br/> Relative Humidity: 5<br/> Temperature: 27<br/> Pressure: 750 Torr</p>

Resource type

dataset

Resource locator

https://gdex.ucar.edu/datasets/d789025/

protocol: https

name: Dataset Description

description: Related Link

function: information

https://gdex.ucar.edu/datasets/d789025/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

2014-01-21

End position

2014-01-21

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

2025-10-09T01:33:14Z

Metadata language