Real‐time 3‐D modeling of the ground electric field due to space weather events. A concept and its validation

Show simple item record Kruglyakov, Mikhail Kuvshinov, Alexey Marshalko, Elena 2022-04-14T09:14:29Z 2022-04-14T09:14:29Z 2022
dc.description.abstract We present a methodology that allows researchers to simulate in real time the spatiotemporal dynamics of the ground electric field (GEF) in a given 3-D conductivity model of the Earth based on continuously augmented data on the spatiotemporal evolution of the inducing source. The formalism relies on the factorization of the source by spatial modes (SM) and time series of respective expansion coefficients and exploits precomputed GEF kernels generated by corresponding SM. To validate the formalism, we invoke a high-resolution 3-D conductivity model of Fennoscandia and consider a realistic source built using the Spherical Elementary Current Systems (SECS) method as applied to magnetic field data from the International Monitor for Auroral Geomagnetic Effect network of observations. The factorization of the SECS-recovered source is then performed using the principal component analysis. Eventually, we show that the GEF computation at a given time instant on a 512 × 512 grid requires less than 0.025 s provided that GEF kernels due to pre-selected SM are computed in advance. Taking the 7–8 September 2017 geomagnetic storm as a space weather event, we show that real-time high-resolution 3-D modeling of the GEF is feasible. This opens a practical opportunity for GEF (and eventually geomagnetically induced currents) nowcasting and forecasting.
dc.language.iso en
dc.publisher American Geophysical Union
dc.relation.ispartofseries Space weather: the international journal of research and applications
dc.rights CC BY 4.0
dc.subject ground electric field (GEF)
dc.subject methodology
dc.subject 3-D conductivity model
dc.subject Earth
dc.subject augmented data
dc.subject spatiotemporal evolution
dc.subject formalism
dc.title Real‐time 3‐D modeling of the ground electric field due to space weather events. A concept and its validation
dc.format.volume 20
dc.format.issue 4
dc.identifier.urn URN:NBN:fi-fe2022041429174
dc.contributor.organization Ilmatieteen laitos fi
dc.contributor.organization Finnish Meteorological Institute en
dc.relation.doi 10.1029/2021SW002906
dc.relation.issn 1542-7390
dc.type.okm A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.type.okm A1 Journal article (refereed), original research en

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