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A Suggested Conjugate Point Dependence for Intense Temperate Latitude Sporadic E
Author(s) -
Smith Ernest K.
Publication year - 1968
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1002/rds196837687
Subject(s) - latitude , earth's magnetic field , ionosphere , quiet , atmospheric sciences , temperate climate , middle latitudes , dominance (genetics) , geomagnetic latitude , physics , geodesy , geology , geophysics , magnetic field , astronomy , biology , biochemistry , botany , quantum mechanics , gene
Certain statistical features of the occurrence of intense sporadic E ( Es ) at temperate latitudes continue to defy explanation. These are: The dominance of the summer maximum, the double‐humped diurnal curve, the abrupt collapse of the summer peak as one progresses to higher latitudes than 60° geomagnetic, and the preference for quiet over magnetically disturbed days. The location of the plasmapause is found to he appropriate to explain the collapse of the summer peak; and its variation in position a possible reason for the preference for quiet days. The summer peak itself (and possibly the shape of the diurnal curve) may he attributable to conditions in the conjugate ionosphere.