Computer Science – Sound
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jatp...42...45s&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 42, Jan. 1980, p. 45-50.
Computer Science
Sound
6
Ionospheric Electron Density, Rocket Sounding, Sporadic E Layer, Wind Shear, Ionospheric Ion Density, Metal Ions, Vertical Distribution, Wind Profiles
Scientific paper
Electron density profiles of sporadic-E layers have been observed with good height resolution using rocket-borne probes. These generally show a simple shape consistent with the effect of a linear wind shear acting on metallic ions. Occasionally more complex shapes have been recorded, including double peaks and, on one occasion, a nearly rectangular profile. A direct method of obtaining the wind profile from the concentration profile of metallic ions has been developed. The metallic ion concentration profile itself is obtained from the electron density profile. Both procedures derive from the steady-state continuity equation. For linear wind shears it is found that the maximum value of the shear is about 50 m/s/km which corresponds to a Richardson number of 1/4. Layers of complex shape are associated with non-linear wind shears in which the maximum shear considerably exceeds this value. It is concluded that the complex profiles of sporadic-E layers can be interpreted as an effect of unstable wind shears.
Miller Kenneth L.
Smith George L.
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