An association between sporadic-E and the earth's magnetic field

Details An association between sporadic-E and the earth's magnetic field An association between sporadic-E and the earth's magnetic field

Apr 1965

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965jatp...27..535g&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 27, no. 4, pp. 535-541

Physics

Scientific paper

A positive correlation was found between changes, over short time intervals [approximate]15 min, hi the horizontal component (H) of the earth's magnetic field near Brisbane, and in the amplitude of direct backscatter (Es[phi]) echoes from the constant-height sporadic-E (Esc) region some 150 km away. Es[phi] echo amplitudes and the occurrence of Esc echoes at vertical incidence were found to be positively correlated. These observations suggest a positive correlation between changes in H and in occurrence of vertical incidence Esc echoes, which is consistent with Whitehead's wind shear theory for the production of temperate zone sporadic-E. In contrast, Wilkie and McNicol (1962) reported a negative correlation between observations, at the same site, of H and sporadic-E occurrence over long time intervals [approximate] 6 hr. The latter results are consistent with Cole's (1963) mechanism of Es layer formation.

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