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Title: Thermospheric Neutral Winds in the Temperate Latitude Station Delhi
Authors: Lumb, H. M.
Setty, C. S. G. K.
Issue Date: Dec-1973
Publisher: NISCAIR-CSIR, India
Abstract: Simultaneous time-dependent continuity equations for ions and the equation of motion for ions and neutral particles are solved numerically in the height range of 120-800 km for temperate latitude station (Delhi, 28.5oN) and in both the momentum equations; the non-linear acceleration terms are omitted. Wind system Is calculated using Jacchia's model atmosphere [Jacchia, L. G., Smithsonion Contr. Astrophys., 8 (1965b), 215].As compared to earlier workers [Geisler, J. E., J. atmos. terr. Phys., 29(1967),1469; and Kohl, H. & King, J. W., J. atmos. terr. Phys., 29 (1967), 1045],who solved only momentum equation, in this paper the equations have been coupled through ion-neutral collision frequency to take into account the feed-back interaction between the ions and neutral air equations. The horizontal wind velocities vary with height and time, and are of the order of 200 msec-1 at about 300 km during night and about 120 msec-1 during daytime for medium solar activity. The zonal wind has a small prevailing eastward component in confirmation with the super-rotation of the upper atmosphere discovered by D. G. King-Hele [Planet. Space Sci., J2 (1964 b), 835], from small changes in the orbital inclination of artificial satellites.
Page(s): 254-260
ISSN: 0975-105X (Online); 0367-8393 (Print)
Appears in Collections:IJRSP Vol.02(4) [December 1973]

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