Abstract
Winds determined from 52 photographically tracked trails of rocket-borne chemical releases in the 90- to 140-km altitude range, launched between October of 1962 and June of 1966, are used in both a correlation analysis and a linear regression analysis with several solar and geomagnetic disturbance indices. Results indicate that the altitude interval considered may be broken up into two distinctly different regions of solar influence: the regions above and below 110 km. Significant increases in the geomagnetic index Kp over a 15-hour interval centered on a time lag of 21 hours after increases in atmospheric circulation below 110 km suggest either a dynamo type of interaction or an increase in the geomagnetic field strength, produced by corpuscular radiation which lags behind the electromagnetic radiation and accompanying atmospheric circulation variations. Apparently continuous associations, with indicated periods of about one solar rotation, between both the solar radio noise index F10.7 and the Zurich sunspot number Rz and the northward wind component magnitude above 110 km indicate that long-term variations in the winds in this region are related to similar variations in solar EUV radiation.
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