What question did this study set out to answer?

To develop and validate a three-dimensional, time-dependent global numerical model capable of simulating thermospheric dynamics under diverse solar and geomagnetic conditions.

November 1, 1980Journal of the Atmospheric Sciences

A Three-Dimensional Time-Dependent Global Model of the Thermosphere

View Full Paper

Ask AI

Bookmark

To develop and validate a three-dimensional, time-dependent global numerical model capable of simulating thermospheric dynamics under diverse solar and geomagnetic conditions.
Solved self-consistent neutral gas equations of continuity, momentum, and energy including Coriolis, inertial, viscosity, and nonlinear terms under a single-species mean molecular weight assumption.
Integrated solar UV/EUV radiation heating alongside high-latitude geomagnetic energy and momentum sources, including Joule heating, ion drag, and empirical polar electric fields.
Evaluated steady-state simulations against ground-based, rocket, and satellite observations across quiet and active geomagnetic conditions (Kp 0–4) and solar activity levels (F10.7 of ~75 to 165 × 10⁻²² W m⁻² Hz⁻¹).
Solar EUV flux matched observed temperatures during low geomagnetic activity when solar heating efficiency was raised from 0.30–0.35 to approximately 0.45 alongside a minor polar source.
Empirical polar electric fields accurately reproduced observed wind patterns across middle, auroral, and polar latitudes under quiet and moderate geomagnetic activity with an added high-latitude energy input of 10⁹ to 10¹⁰ W per hemisphere.
Observed temperature and meridional wind discrepancies indicated the presence of an additional high-latitude energy source attributable to low-energy (suprathermal to several hundred eV) particle precipitation rather than keV electrons.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Simulation study reveals global dynamical behavior in the terrestrial thermosphere, indicating that solar ultraviolet flux and polar electrodynamic forces primarily drive upper atmospheric...

Cite This Study

Fuller‐Rowell et al. (1980) studied this question.

synapsesocial.com/papers/6a707e08e36a167817e247ba https://doi.org/10.1175/1520-0469(1980)037<2545:atdtdg>2.0.co;2

View Full Paper

Ask AI

Bookmark

Implication

Simulation study reveals global dynamical behavior in the terrestrial thermosphere, indicating that solar ultraviolet flux and polar electrodynamic forces primarily drive upper atmospheric...

A Three-Dimensional Time-Dependent Global Model of the Thermosphere

Key Points

Discussion

Implication

Cite This Study

A Three-Dimensional Time-Dependent Global Model of the Thermosphere

Key Points

Discussion

Implication

Cite This Study

Also Consider

Also Consider