Ionospheric disturbances by severe tropospheric weather storms

Details Ionospheric disturbances by severe tropospheric weather storms Ionospheric disturbances by severe tropospheric weather storms

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37.1357p&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 37, Oct. 1975, p. 1357-1363. Research supported by the Research Corp.;

Computer Science

Sound

9

Acoustic Propagation, Ionospheric Disturbances, Radio Observation, Thunderstorms, Troposphere, Doppler Effect, Frequency Shift, Ionospheric Sounding, Radio Echoes

Scientific paper

Radio observations made near Gainesville, Florida, are reported. Wavelike ionospheric disturbances were observed when thunderstorms with tops (radar heights) in excess of about 40,000 ft occurred within a radius of 250 km about the radio reflection (middle) point in the ionosphere. It appears that the nighttime storms are more efficient in exciting the ionospheric waves. These waves have periods ranging between 1 and 5 min and were detected as Doppler shifts in the ionospheric radio echoes. The spectral content of the ionospheric wave varies from one storm to another. Even for a given storm, the spectral characteristics of the ionospheric response varied from hour to hour. It is suggested that the observed periods were characteristics of the acoustic sources in thundercloud cells. Smearing of the Doppler records was very common during the occurrence of the (summer) afternoon storms. It is suspected that the smearing may be a manifestation of a different form of ionospheric effect of these clouds.

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