Nonlinear theory of type II irregularities in the equatorial electrojet
The two fluid equations of motion describing type II irregularities in the equatorial electrojet are reformulated in terms of a scalar and vector potential for the fluid momentum densities. Elimination of the vector potential yields a single equation, first order in time, for the time evolution of the ionization density. Following Sudan and Keskinen, this equation is solved in the direct interaction approximation for the nonlinear spectral width of the two-dimensional, steady-state turbulence. Numerical results are given for the power law wavenumber spectrum which results from theoretical considerations, computer simulations, and observations of type II irregularities. These results extend the work of Sudan and Keskinen to smaller wavenumbers and higher levels of turbulence.
- Research Organization:
- Polytechnic Institute of New York, Long Island Center, Farmingdale, New York 11735
- OSTI ID:
- 5661339
- Journal Information:
- Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 23:3; ISSN PFLDA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANALYTICAL SOLUTION
COMPUTER CALCULATIONS
CURRENTS
DIFFERENTIAL EQUATIONS
ELECTRIC CURRENTS
ELECTROJETS
EQUATIONS
EQUATIONS OF MOTION
FOURIER TRANSFORMATION
FUNCTIONS
GREEN FUNCTION
INTEGRAL TRANSFORMATIONS
ION DENSITY
LAPLACE TRANSFORMATION
NONLINEAR PROBLEMS
PLASMA
POISSON EQUATION
POTENTIALS
SIMULATION
TIME DEPENDENCE
TRANSFORMATIONS
TURBULENCE