Accession Number : ADA599154


Title :   Ionosphere-Thermosphere Coupling - Data Analysis and Numerical Simulation Study


Descriptive Note : Final rept.14 Nov 2012-18 Oct 2013


Corporate Author : NEW MEXICO UNIV ALBUQUERQUE


Personal Author(s) : Christodoulou, Christos


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a599154.pdf


Report Date : 12 Dec 2013


Pagination or Media Count : 28


Abstract : The well-known Fang parameterizations of monoenergetic particle impact ionization have been applied to the complex energy spectra measured by the DMSP F16 satellite to calculate the ionization rates from electron and ion precipitations for a northern hemisphere pass from 0030 UT to 0106 UT on August 6, 2011. The particle impact ionization rates using the Fang parameterizations showed a clear enhancement at F-region altitudes in the polar cap region mainly due to the low-energy precipitating electrons. The general circulation models (GCMs), the NCAR Thermosphere-Ionosphere-Electrodynamics General Circulation Model (TIE-GCM) and the Global Ionosphere Thermosphere Model (GITM) do not capture the observed features shown in the total particle ionization rate when applying the Fang parameterizations to DMSP measurements. The difference between the GCM simulations and those obtained by the Fang models, applied to DMSP data, is due to the difference of both the inputs to the models and the parameterization of the ionization rates.


Descriptors :   *IONOSPHERE , *THERMOSPHERE , ELECTRONS , HEMISPHERES , IONIZATION , IONOSPHERIC MODELS , IONS , LOW ENERGY , NORTHERN HEMISPHERE , NUMERICAL ANALYSIS , OPTIMIZATION , POLAR CAP , POLAR REGIONS , PRECIPITATION


Subject Categories : Atmospheric Physics


Distribution Statement : APPROVED FOR PUBLIC RELEASE