edu.ucar.gdex::d789262 eng; USA utf-8 dataset NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu NSF NCAR Geoscience Data Exchange 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. download pointOfContact 2025-07-21T20:50:41Z ISO 19115 Geographic Information - Metadata ISO19115:2003/Cor 1 2006 https://doi.org/10.5065/4td4-fr39 https://doi.org/10.5065/4td4-fr39 https Related Resource #1 Icarus Dataset at UC-Davis ICARUS Chamber Experiment: Ziemann_20150830_Methyl nitrite/Nitric oxide/3-Dodecanone_Hydroxyl radical_DOS d789262 2022-01-07 publication Ziemann, Paul author NSF National Center for Atmospheric Research publisher Goals: Determine SOA yield of OH radical oxidation of the VOC Summary: Experiments were conducted in an 8.0 m^3 Teflon chamber at ambient temperature (25 degreeC) and pressure (630 Torr). Chamber air (< 5 ppbv hydrocarbons and < 1% RH) was supplied by two AADCO 737-Series pure air generators. The chamber was first seeded with dioctyl sebacate (DOS) particles generated using an evaporation condensation source, and then a measured amount of dodecanone isomer was added from a heated glass bulb in a flow of nitrogen, followed by NO and methyl nitrite, which were each added from a calibrated glass bulb that was filled to a measured pressure on a vacuum manifold and then flushed with nitrogen. After adding each component a Teflon-coated fan was used to actively mix the chamber for 30 s. Concentrations of dodecanone, NO, and methyl nitrite were 1, 5, and 5 ppmv, with 200 g/m^3 DOS seed particles added. To initiate the reaction, blacklights that cover two walls of the chamber were turned on for 60 minutes at light intensities equivalent to NO2 photolysis rate constant of 0.37 min^-1, respectively, to generate OH radicals from methyl nitrite photolysis 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, 3-Dodecanone Reaction Type: Photooxidation Relative Humidity: 1 Temperature: 25 Seed Name: DOS Pressure: 630 completed datahelp@ucar.edu pointOfContact notPlanned dataset https://gdex.ucar.edu/images/ds_logos/default_200_200.png Logo thumbnail from URL png ASCII dataset Resource Type 2021-03-30 revision 4.4 DataCite Metadata Working Group orginator resourceTypeGeneral LABORATORY > LABORATORY U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-02-27 revision 23.4 NASA Global Change Master Directory orginator Valids List: Platforms ICARUS > Integrated Chamber Atmospheric data Repository for Unified Science U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-02-27 revision 23.4 NASA Global Change Master Directory orginator Valids List: Projects EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > TRACE GASES/TRACE SPECIES U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2026-02-27 revision 23.4 NASA Global Change Master Directory orginator Valids List: Science and Services Keywords Creative Commons Attribution 4.0 International License None eng utf-8 environment 2015-08-30 2015-08-30 NSF NCAR Geoscience Data Exchange datahelp@ucar.edu https://gdex.ucar.edu distributor 7.438 https://gdex.ucar.edu/datasets/d789262/ https Dataset Description Related Link information https://gdex.ucar.edu/datasets/d789262/dataaccess/ https Data Access Related Link download none asNeeded