Abstract
Abstract Narrow band slices have been taken of the radio emission spectrum from convective clouds in the frequency range from 30 mc./sec. to 550 mc./sec. and at 7.5 kc./sec. to monitor long and short range lightning discharges. Despite the careful choice of the bands to avoid interference from manmade sources, a major problem is the identification of spurious noise. In spite of these interferences, radiation apparently associated with growing convective clouds has been observed from an aircraft. The number of discharges per km.2 per sec. observed at the different frequencies is a function of receiver sensitivity, suggesting that “atmospherics” vary greatly in spectral intensity. The number of discharges observed generally exceeds previous estimates. A relation between the occurrence of sporadic E and major thunderstorm precipitation areas is reported and evaluated in light of previous observations of the similar relationships. Together, the concepts suggest a linkage between strong solar flare activity an...
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