Data · dataset · 2026
ICARUS Chamber Experiment: Caltech Atmospheric Chamber_20150130_METHACROLEIN/Methyl nitrite/10102-44-0_Hydroxyl radical_Ammonium sulfate_RH40%
Listed in National Center for Atmospheric Research
Goals: This experiment was done to study the Methacrolein high NO2 photooxidation in the presence of wet ammonium sulfate (AS) seeds at RH 40%, since the other experiments were done at low RH and without seed particles.
Description
The hypothesis is that particle liquid water will decrease SOA formation because water will hydrolyze HMML instead of allowing it to oligomerize on the particle surface. This liquid water is also hypothesized to liberate 2-methylgycleric acid (2MGA) from the aerosol to the gas phase.
Summary
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Interestingly, gas-phase 2MGA is not significantly enhanced and aerosol mass is not significantly decreased in the 40% RH experiment (Experiment #12) compared to the dry experiments. It is possible that the liquid water content under these conditions (30% by volume) is not high enough to dominate the reaction with HMML or there is a barrier to 2MGA volatilization. We do see the hypothesis confirmed in the fully deliquesced particle in the 85% RH experiment (150208) Organization: Caltech Atmospheric Chamber Lab Affiliation: California Institute of Technology, Pasadena, CA Chamber: Near/Far Bag 2012-2015 (Tran) Experiment Category: Gas phase chemical reaction, Aerosol formation Oxidant: Hydroxyl radical Reactants: METHACROLEIN, Methyl nitrite, 10102-44-0 Reaction Type: Photooxidation Relative Humidity: 40 Temperature: 25 Seed Name: Ammonium sulfate Pressure: 750 Torr
Links
Get the data
- Resource Homepage doi.org/10.5065/b9xa-zt95 ↗
download · DOI / persistent id · from data ucar edu
Where it is published
- data.ucar.edu /dataset/icarus-chamber-experiment-caltech-atmospheric-chamber_… ↗
National Center for Atmospheric Research dataset page
landing page · from data ucar edu
Catalogue records · 1
- CKAN API data.ucar.edu/api/3/action/package_show?id=5b55f58c-0574-4fe3-9cdf-a0805cb3c… ↗
metadata API · from data ucar edu
Topics
- From keywords
- Chemistry · Earth & Environmental Science · Life Sciences · Ocean & Atmospheric Science · Social Science
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| National Center for Atmospheric Research | 5b55f58c-0574-4fe3-9cdf-a0805cb3c8f3 | 12 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| concepts[field].local:field:chemistry | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:life-sciences | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:ocean-atmospheric | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| concepts[field].local:field:social-science | mapping · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| created_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| description | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /notes |
| publication_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 | |
| title | source · data ucar edu | connector:data_ucar_edu@1.0.0 | /title |
| updated_date | source · data ucar edu | connector:data_ucar_edu@1.0.0 |