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Quasi-6-Day Wave Modulation of the Equatorial Electrojet
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2018
Source: Journal of Geophysical Research: Space Physics, 123(5), 4094-4109
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Journal Title:Journal of Geophysical Research: Space Physics
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Description:Theequatorialelectrojetisanenhancedeastwardcurrentinthedayside Eregionionosphere flowingalongthemagneticequator.Theequatorialelectrojetishighlyvariableasitissubjecttovarious forcing mechanismsincluding atmospheric waves from thelower layers of the atmosphere. There are occasionallytimeswhentheintensityoftheequatorialelectrojetatafixedlongitudeshowsanoscillatoryvariation with a period of approximately 6 days. We present case studies of such events based on the equatorial electrojet measurements from the CHAMP and Swarm satellites. The spatial and temporal variabilityoftheequatorialelectrojetintensityduringtheseeventsrevealscharacteristicsofawestward propagatingwavewithzonalwavenumber1,consistentwiththeeffectofthequasi-6-dayplanetarywave.
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Source:Journal of Geophysical Research: Space Physics, 123(5), 4094-4109
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ISSN:2169-9380
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