edu.ucar.gdex::4b271389-d4b2-47f9-a394-76c2a69f1f74 eng; USA utf8 dataset GDEX Curator UCAR/NCAR - GDEX gdex@ucar.edu pointOfContact 2022-02-10T13:37:35-07:00 ISO 19115 Geographic information - Metadata ISO 19115:2003(E) https://doi.org/10.5065/p3wa-1q97 Seasonal Variation of Thermospheric Composition Observed by NASA GOLD 2022-02-10 publication 2022-02-10 modified https://doi.org/10.5065/p3wa-1q97 UCAR/NCAR - GDEX gdex@ucar.edu publisher Qian, Liying UCAR/NCAR - High Altitude Observatory lqian@ucar.edu author We examine characteristics of the seasonal variation of thermospheric composition using column number density ratio ∑O/N2 observed by the NASA Global Observations of Limb and Disk (GOLD) mission from low-mid to mid-high latitudes. We found that the ∑O/N2 seasonal variation is hemispherically asymmetric: in the southern hemisphere, it exhibits the well-known annual and seminal pattern, with highs near the equinoxes, and primary and secondary lows near the solstices. In the northern hemisphere, it is dominated by an annual variation, with a minor semiannual component with the highs shifting towards the wintertime. We also found that the durations of the December and June solstice seasons in terms of thermospheric composition are highly variable with longitude. Our hypothesis is that ion-neutral collisional heating in the equatorial ionization anomaly region and auroral Joule heating play substantial roles in this longitudinal dependency. NASA NNH19ZDA001N-HSR, NASA 80NSSC18K0648, NASA 80NSSC19K0278, NASA NNH19ZDA001N-HGIO Liying Qian UCAR/NCAR - High Altitude Observatory lqian@ucar.edu pointOfContact application/octet-stream Dataset DataCite Resource Type 2014-10-16 revision 3.1 DataCite Metadata Working Group originator resourceTypeGeneral EARTH SCIENCE > SUN-EARTH INTERACTIONS > IONOSPHERE/MAGNETOSPHERE DYNAMICS > ION CHEMISTRY/IONIZATION EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE PROPERTIES > PARTICLE DENSITY theme NASA/GCMD Earth Science Keywords Science and Services Keywords 2018-03-15 revision 8.6 Global Change Master Directory (GCMD). 2018. GCMD Keywords, Version 8.6. Greenbelt, MD: Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://earthdata.nasa.gov/gcmd-forum EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > SPECTROMETERS/RADIOMETERS > SPECTROMETERS > GOLD > GLOBAL-SCALE OBSERVATIONS OF THE LIMB AND DISK theme NASA/GCMD Earth Science Keywords Instruments and Sensors Keywords 2018-03-15 revision 8.6 Global Change Master Directory (GCMD). 2018. GCMD Keywords, Version 8.6. Greenbelt, MD: Global Change Data Center, Science and Exploration Directorate, Goddard Space Flight Center (GSFC) National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://earthdata.nasa.gov/gcmd-forum Creative Commons Attribution 4.0 International License. None 5.0 5.0 eng; USA -180.0 180.0 -60.0 60.0 2018-10-05 2021-09-30 application/octet-stream UCAR/NCAR - CISL - CDP resourceProvider https://gdex.ucar.edu/dataset/id/4b271389-d4b2-47f9-a394-76c2a69f1f74.html https browser Seasonal Variation of Thermospheric Composition Observed by NASA GOLD Metadata Link download