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Modeling the Impact of Metallic Ion Layers on Equatorial Spread With SAMI3/ESF

AuthorHuba, J.; Krall, J.; Drob, D.;
KeywordsEquatorial ionosphere; Equatorial Spread F; metal ions; sporadic E

The impact of urn:x-wiley:grl:media:grl60258:grl60258-math-0005 region metal ion layers on the development of equatorial plasma bubbles is investigated using the SAMI3/ESF model. We find that metal ion layers reduce the growth rate of the generalized Rayleigh-Taylor instability (GRTI) and act to suppress the development of equatorial plasma bubbles. This is consistent with theoretical expectations and observations and is attributed to the increase in both the Pedersen and Hall conductances. Additionally, inhomogeneities in the urn:x-wiley:grl:media:grl60258:grl60258-math-0006 region metal ion layer can map into the urn:x-wiley:grl:media:grl60258:grl60258-math-0007 layer and alter the morphology of equatorial spread urn:x-wiley:grl:media:grl60258:grl60258-math-0008 (ESF) bubble evolution. Lastly, we find that if EFS bubbles develop in the presence of a metal ion layer, then the electric fields generated by the instability can lift the metal ions into the urn:x-wiley:grl:media:grl60258:grl60258-math-0009 region. This is consistent with observations of Fe urn:x-wiley:grl:media:grl60258:grl60258-math-0010 in the urn:x-wiley:grl:media:grl60258:grl60258-math-0011 region during equatorial spread urn:x-wiley:grl:media:grl60258:grl60258-math-0012.

Year of Publication2020
JournalGeophysical Research Letters
Number of Pages
Date Published02/2020