During the four years from 1948 to 1952 radiosonde flights were made from Belmar, New Jersey up to altitudes of 40 kilometers. Seasonal averages of the temperature and wind data obtained from these flights indicate a definite seasonal trend at all the observed altitudes. On the average the temperatures above 16 kilometers are higher in the summer and lower in the winter, increasing with altitude at a rate of one and one-half to two degrees centigrade per kilometer. The average wind speed above twenty-two kilometers increases with altitude; however, it varies greatly in speed and direction with the change in seasons, being in general strong and westerly during the winter and light and easterly during the summer.
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