edu.ucar.opensky::technotes:501 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T03:58:00.823303 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7xw4j7r Parameterization of the ion convection and the auroral oval in the NCAR Thermospheric General Circulation Models 2012-07-01T00:00:00Z publication https://n2t.org/ark:/85065/d7xw4j7r https://doi.org/10.5065/D6N29TXZ Emery, Barbara A. author Roble, Raymond G. author Ridley, E. Cicely author Richmond, Arthur D. author Knipp, D. author Crowley, G. author Evans, D. author Rich, F. author Maeda, S. author UCAR/NCAR - Library publisher The ion convection and auroral precipitation are important inputs to the global thermospheric energy and momentum balance. In the NCAR TGCM, they are described by analytical models whose characteristics are specified by three parameters: total polar cap potential drop Ψ IMF By component, and hemispheric power input HP. The characteristics of the ion convection model are determined from electric potential patterns derived from ionospheric electrodynamic mapping on 3 days using incoherent scatter radars, satellites and magnetometers. These characteristics are sorted in By and compared with various models that have been described in the literature. NOAA and DMSP satellite electron precipitation data over 20 days have been averaged to specify the characteristics of the auroral precipitation. The relationship of hemispheric power to other parameters is explored. Finally, a specific period is examined and the parameterization is adjusted to fit the observations. Updates to the parameterizations since 1989 are then described in the section 6 before the Conclusions. All parameterizations, original and 2012 values, are listed along with cross-referenced equation and figure numbers in Table A of Appendix A. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Solar-atmosphere/space-weather models Solar energetic particle properties Ionosphere/magnetosphere dynamics theme U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2021-09-17 revision 11.2 NASA Global Change Master Directory originator Valids List: Science and Services Keywords Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation