Abstract
Dynamo currents and resulting geomagnetic variations induced by neutral winds simulated by Middle Atmosphere Circulation Model at Kyushu University (MACMKU) are examined. Assuming a steady (having a diurnal cycle but no day-to-day variation) conductivity in the dynamo region, dynamo currents induced by the neutral winds and an additional prescribed steady diurnal (1, -2) mode to supply the in situ tides, those are not included in MACMKU, are calculated for the 10 days of the perpetual October 1st condition. As a result of neutral winds fluctuation superposed on the prescribed regular (1, -2) mode, Sq shows day-to-day and time-to-time variations. The present result suggests that neutral winds fluctuations propagated from below can induce significant day-to-day and time-to-time Sq variations even though the electromagnetic environment in the lower thermosphere is kept in a steady state.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
