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Coupled Thermosphere Ionosphere Plasmasphere Electrodynamics Model

CCMC Services available for CTIPe
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Model Developer(s)
Timothy Fuller-Rowell, Mihail Codrescu, et al.
NOAA Space Weather Prediction Center

Model Description
The Coupled Thermosphere Ionosphere Plasmasphere Electrodynamics Model (CTIPe) model consists of four distinct components:

All four components of the CTIPe are run concurrently and are fully coupled with respect to energy, momentum, and continuity.

The thermospheric code simulates the time-dependent global structure of the wind vector, temperature, and density of the neutral thermosphere by numerically solving the non-linear primitive equations of momentum, energy, and continuity on a 3D spherical polar grid rotating with the Earth. The latitude resolution is 2 deg, longitude resolution is 18 deg, and the vertical direction is divided into 15 levels in logarithm of pressure from lower boundary of 1 Pa at 80 km altitude. The equation of motion includes Coriolis effects, horizontal pressure gradients, horizontal and vertical viscosity, and ion drag. The non-linear energy equation describes horizontal and vertical advection of energy, horizontal and vertical heat conduction by both molecular and turbulent diffusion, heating by solar UV and EUV radiation, cooling by infrared radiation, and ionospheric Joule heating. The continuity equation incorporates three major species: atomic oxygen, molecular nitrogen and molecular oxygen and include chemistry, transport and the mutual diffusion between species.

The high-latitude ionosphere convection model calculates field-aligned ion velocity components from the field-aligned momentum equation. The model includes chemistry, gravity, and ion-ion and ion-neutral collisional drag. The ionosphere is computed self-consistently with the thermosphere pole-ward of 23 degrees latitude in both hemispheres. Transport under the influence of magnetospheric electric fields is explicitly treated, assuming ExB drifts and collisions with neutral particles.

The plasmasphere model solves coupled equations of continuity, momentum and energy balance along many closed flux tubes concurrently. The orientation of flux tubes is determined by eccentric dipole approximation to the Earth's magnetic field. Each flux-tube is subject to ExB drift.

Model Input

Model Output

References and relevant publications

Codrescu, M. V., T. J. Fuller-Rowell, J. C. Foster, J. M. Holt, and S. J. Cariglia, Electric field variability associated with the Millstone Hill electric field model, J. Geophys. Res., 105, 5265,5273, 2000.

Fuller-Rowell, T.J., M. V. Codrescu, B. G. Fejer, W. Borer, F. Marcos and D. N. Anderson, Dynamics of the low-latitude thermosphere: Quiet and disturbed conditions, J. Atmos. Terr. Phys., 59, 1533-1540, 1997.

Fuller-Rowell, T.J., D. Rees, S. Quegan, R.J. Moffett, M.V. Codrescu, and G.H. Millward, STEP Handbook on Ionospheric Models (ed. R.W. Schunk), Utah State University, 1996.

Hagan, M. E., M. D. Burrage, J. M. Forbes, J. Hackney, W. J. Randel, and X. Zhang, GSWM-98: Results for migrating solar tides, J. Geophys. Res., 104, 6813-6828, 1999.

Millward, G. H., R. J. Moffett, S. Quegan, and T. J. Fuller-Rowell, STEP Handbook on Ionospheric Models (ed. R.W. Schunk), Utah State University, 1996b.

Mueller-Wodarg, I.C.F., A.D. Aylward and T.J. Fuller-Rowell, Tidal Oscillations in the Thermosphere: A Theoretical Investigation of their Sources, J. Atmos. Terr. Phys., 63, 899-914, 2001.

Stanley C. Solomon and Liying Qian, Solar extreme-ultraviolet irradiance for general circulation models, Journal of Geophysical Research, 110, A10306, doi:10.1029/2005JA011160, 2005.

Weimer, D. R., Predicting surface geomagnetic variations using ionospheric electrodynamic models, J. Geophys. Res., Vol. 110, No. A12, A12307, 2005.

CCMC Contact(s)


Developer Contact(s)
Mihail Codrescu

Tim Fuller-Rowell

National Aeronautics and Space Administration Air Force Materiel Command Air Force Office of Scientific Research Air Force Research Laboratory Air Force Weather Agency NOAA Space Environment Center National Science Foundation Office of Naval Research

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