Physics
Scientific paper
Sep 1963
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1963jatp...25..481k&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 25, no. 9, pp. 481-494
Physics
1
Scientific paper
Two models were considered for the height distribution of electron density. Model A corresponds to that of "normal" ionosphere at winter-night-time while Model B corresponds to that of "aurora-excited" ionosphere. Assuming the atmosphere to be that of the "ARDC Model Atmosphere, 1959", the atmospheric conductivities k0 to k3, over Fort Churchill at winter-night-time were calculated for each model. Model A--K0 (Longitudinal conductivity) increases upwards over the range considered. The peak values of k1 (Pedersen conductivity), k2 (Hall conductivity) and k3 (Cowling conductivity) are 1·64 × 10-16, 2·89 × 10-16, 6·13 × 10-16 e.m.u. cm respectively. The peak values of k1, k2 and k3 occur at the heights of 119, 106 and 96 km respectively. The total integrated conductivities, K1, K2, K3 are 10·96 × 10-10, 8·86 × 10-10, 10·16 × 10-9 e.m.u. cm respectively. The values of K1, K2, K3 over Fort Churchill at winter-night-time are approximately of the corresponding values over White Sands at summer-day-time in the sunspot maximum year. Model B--K0 increases abruptly in the region of auroral heights. The peak values of k1, K2, k3 for Model B are 8·32 × 10-14, 2·70 × 10-13 and 2·86 × 10-12 e.m.uE cm respectively. The peak values of k1, K2 and k3 occur at 115, 105, and 102 km respectively. The total integrated conductivities, K1, K2, K3 are respectively 21·38 × 10-8, 40·59 × 10-8 and 22·49 × 10-7 e.m.u. cm for Model B. The effective layers for k1, k2 and k3 for Model B are confined to the region of auroral heights. In particular, the effective layers of k3 are very thin and located in the region of 100-110 km. The height-integrated conductivities of "aurora excited" ionosphere are approximately 200 times greater than those of quiet ionosphere.
Kim Jinyoung Serena
Kim Yeon Han
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