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Coupled Thermosphere/Ionosphere Plasmasphere (CTIP) Model
Entry ID: ION_THERMO_FULLER_ROLLELL
Abstract: The coupled thermosphere-ionosphere-plasmasphere (CTIP) model consists of three
-A global thermosphere model;
-A high latitude ionosphere model;
-A mid and low-latitude ionosphere/plasmasphere model.
All three model components 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. e 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
deg 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.
ISO Topic Category
Creation and Review Dates