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Do we need a geoelectric index?The need for a geoelectric index (GI) measuring the global level of atmospheric electrical activity for a given time is assessed, and methods for defining a GI are compared. Current problems in atmospheric and space electrodynamics (the global circuit, solar-terrestrial coupling, lightning effects on the ionosphere/magnetosphere, and mesospheric generators), atmospheric chemistry (the stratospheric ozone cycle and atmospheric gravity waves), and meteorology (fog forecasting) are reviewed to illustrate the usefullness of a GI. Derivations of a GI from in situ electrical measurements and from ground or satellite remote sensing of source properties are described, and a system based on ground measurement of the intensity of the Schumann resonance lines (as proposed by Polk, 1982) is found to be the most practical, requiring as few as three (automatically operated) stations for global coverage.
Document ID
19870053002
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Holzworth, R.
(Washington, University Seattle, United States)
Volland, H.
(Bonn, Universitaet Germany)
Date Acquired
August 13, 2013
Publication Date
July 1, 1986
Publication Information
Publication: EOS
Volume: 67
ISSN: 0096-3941
Subject Category
Geophysics
Accession Number
87A40276
Funding Number(s)
CONTRACT_GRANT: NAGW-724
CONTRACT_GRANT: NSF ATM-82-12283
CONTRACT_GRANT: NAG5-604
CONTRACT_GRANT: NSF ATM-84-11326
Distribution Limits
Public
Copyright
Other

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