Open AccessAre whistler ducts created by thunderstorm electrostatic fields?
Author(s) -
Rodger Craig J.,
Thomson Neil R.,
Dowden Richard L.
Publication year - 1998
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/97ja02927
Subject(s) - whistler , ionosphere , electric field , plasma , physics , conductivity , geophysics , thunderstorm , earth's magnetic field , computational physics , duct (anatomy) , meteorology , flux (metallurgy) , atmospheric electricity , electrical resistivity and conductivity , atmospheric sciences , magnetic field , materials science , quantum mechanics , medicine , pathology , metallurgy
Park and Helliwell [1971] suggested that whistler ducts might be caused by plasma interchange of geomagnetic flux tubes driven by thundercloud electrostatic fields. At present, this is the most favored whistler duct creation mechanism. Theoretical formulations have been developed to calculate high‐altitude electric fields due to electrified clouds, taking into account the presence of the ionosphere. Previous studies have calculated the values of these fields, making use of approximated conductivity profiles. Calculations are undertaken using more accurate representations of more modern conductivity profiles than those used previouly. Preference is given to experimental rather than theoretically derived conductivity profiles. These calculations indicate that under “typical” conductivity conditions the high‐altitude electric fields from even giant thunderclouds are too small to create a realistic whistler duct in a realistic period. This is the case for both day and night conditions.