HIPPO-3 Airborne Oxygen Instrument (AO2) https://data.eol.ucar.edu/dataset/121.009 Summary The NCAR Airborne Oxygen Instrument (AO2) was mounted on the NCAR GV during the HIPPO-3 project. The submitted AO2 data are in 1 flat ascii text file per flight. Each file contains running 10-second medians (of the original ~ 2.5-second data) at 1 Hz matching the times in the RAF data files. The files are in NASA Ames 1001 format, with a final comment line of variable names (UT CO2_AO2orig O2_AO2orig APO_AO2orig CO2_AO2 O2_AO2 APO_AO2), spaces separating columns, and 9999.99 for missing data. The reported times correspond to when the air entered the inlet. This instrument measures O2/N2 ratio as well as CO2 concentration. Identifiers * Local archive identifier: 121.009 * doi:10.5065/D67H1GXJ https://doi.org/10.5065/D67H1GXJ Versions 1.0 2.0: The AO2 and Medusa data sets have been updated to coincide with the publication of Stephens et al., Atmospheric Measurement Techniques, 2021. For Medusa O2 data, this has included some additional flask screening and updates to the Ar/N2 correction. For AO2 O2 data, this has included more extensive QAQC and filtering updates, revisions to the time-or-flight and mean offset corrections, and implementation of an empirical ascent/descent correction, as described in the paper. For both AO2 and Medusa, the O2 data have been updated for a span correction to the SIO O2 Scale. Citation Stephens, B., et al. 2021. HIPPO-3 Airborne Oxygen Instrument. Version 2.0. UCAR/NCAR - Earth Observing Laboratory. https://doi.org/10.5065/D67H1GXJ Accessed 28 Mar 2024. Additional citation styles can be generated by entering the DOI at CrossCite (https://citation.crosscite.org/). Acknowledgement In addition to the citation reference and any other acknowledgements, please acknowledge NCAR/EOL in your publications with text such as: Data provided by NCAR/EOL under the sponsorship of the National Science Foundation. https://data.eol.ucar.edu/ Related projects * HIPPO3: HIAPER Pole to Pole Observations 3 (HIPPO-3) https://data.eol.ucar.edu/project/HIPPO3 Additional information * Spatial Type: point * Frequency: 1 second * Language: English Categories * Aircraft Platforms * NSF/NCAR GV HIAPER Instruments * AO2 - Airborne Oxygen GCMD Science Keywords * EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > OXYGEN COMPOUNDS > MOLECULAR OXYGEN * EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > CARBON AND HYDROCARBON COMPOUNDS > ATMOSPHERIC CARBON DIOXIDE Documentation * AO2_readme_210126.pdf [124 KiB] https://data.eol.ucar.edu/file/download/4272554D6AC2/AO2_readme_210126.pdf Restrictions * EULA: fair-use.html [2 KiB] https://data.eol.ucar.edu/file/download/4272514151F8/fair-use.html Related links * companion: 112.134: Multiple Project 2008-2016 Airborne Oxygen Instrument (AO2) Data https://data.eol.ucar.edu/dataset/112.134 * homepage: EOL HIPPO Overview page https://www.eol.ucar.edu/field_projects/hippo * info: HIPPO-3 Missions https://catalog.eol.ucar.edu/hippo3/missions/missions.html * info: Airborne Oxygen Instrument Documentation https://www.eol.ucar.edu/instruments/airborne-oxygen-instrument * homepage: HIPPO-3 Project Page https://www.eol.ucar.edu/field_projects/hippo-3 * info: HIPPO Data Policy https://www.eol.ucar.edu/sites/default/files/files_live/private/HIPPO_Full_Data_Policy_lah_20170915_1.pdf Temporal coverage * Begin datetime: 2010-03-16 00:00:00 * End datetime: 2010-04-16 23:59:59 Spatial coverage * Maximum (North) Latitude: 90.00 * Minimum (South) Latitude: -70.00 * Minimum (West) Longitude: 165.00 * Maximum (East) Longitude: -80.00 Primary contact information * pointOfContact: EOL Data Support https://data.eol.ucar.edu/contact/show/1 Additional contact information * principalInvestigator: Britton B. Stephens https://data.eol.ucar.edu/contact/show/971 * author: Britton B. Stephens https://data.eol.ucar.edu/contact/show/971 * author: Ralph F. Keeling https://data.eol.ucar.edu/contact/show/1604 * author: Jonathan Bent https://data.eol.ucar.edu/contact/show/2235 * author: Andrew Watt https://data.eol.ucar.edu/contact/show/2236 * author: Stephen R. Shertz https://data.eol.ucar.edu/contact/show/2310 * author: William Paplawsky https://data.eol.ucar.edu/contact/show/2239 Alternate metadata formats * DataCite: https://data.eol.ucar.edu/dataset/121.009?format=datacite * ISO/TC 211: https://data.eol.ucar.edu/dataset/121.009?format=isotc211