Other
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa51b1615f&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA51B-1615
Other
[2415] Ionosphere / Equatorial Ionosphere, [2447] Ionosphere / Modeling And Forecasting
Scientific paper
We do not fully understand all the relevant physics of the equatorial ionosphere, so that current models do not completely agree with each other and are not able to accurately reproduce observations. To understand the strengths and the limitations of theoretical, time-dependent, low-latitude ionospheric models in representing observed ionospheric structure and variability and to better understand the underlying ionospheric physics and develop improved models, we initiated a multi-year Equatorial-PRIMO workshop at the CEDAR meeting this year. Two sets of ionosphere-plasmasphere models are participated: non self-consistent models including Ionospheric Forecast Model (IFM), Ionosphere-Plasmasphere Model (IPM), Low Latitude Ionospheric Specification Model (LLIONS), Physically Based Model (PBMOD), Global Ionosphere and Plasmasphere (GIP), SAMI2 is Another Model of the Ionosphere (SAMI2) and self-consistent models including SAMI3 is Also a Model of the Ionosphere (SAMI3), Thermosphere-Ionosphere-Electrodynamics general circulation model (TIE-GCM), Thermosphere-Ionosphere-Mesosphere-Electrodynamics general circulation model (TIME-GCM), Global Ionosphere-Thermosphere Model (GITM), the Coupled Thermosphere Ionosphere Plasmasphere Electrodynamics (CTIPe), Integrated Dynamics through Earth’s Atmosphere (IDEA). In order to have fair comparisons, we set the Burnside factor (the collision frequency between O+-O) to 1 and F10.7 to 120. All the models are run under geomagnetic quiet conditions in equinox, June solstice, and December solstice. Diurnal variation of electron density, neutral density, wind velocity, and vertical drifts at Jicamarca longitude at equatorial region from these models will be compared. Currently, of the non self-consistent models, PBMOD, SAMI2 and GIP have been run under these conditions. For the self-consistent models, calculations using CTIPe, GITM and TIE-GCM have been carried out. Furthermore, since the lower boundary conditions can be an important source in reproducing ionospheric variability and causing differences in the models, we implement the Whole Atmosphere Model (WAM) as the lower boundary of CTIPe. The comparisons of CTIPe neutral wind and electron density with and without WAM as lower boundary will help us determine the possibility of testing the same lower boundary conditions in participated models. We present these results and describe our vision of the way forward for Equatorial-PRIMO.
Akmaev Rashid A.
Anderson Dale N.
Codrescu Mihail
Crowley Geoff
Eccles Vincent J.
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