Dimmock, AP;
Welling, DT;
Rosenqvist, L;
Forsyth, C;
Freeman, MP;
Rae, IJ;
Viljanen, A;
... Yordanova, E; + view all
(2021)
Modeling the geomagnetic response to the September 2017 space weather event over Fennoscandia using the Space Weather Modeling Framework: Studying the impacts of spatial resolution.
Space Weather
, 19
(5)
, Article e2020SW002683. 10.1029/2020sw002683.
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Abstract
We must be able to predict and mitigate against GIC effects to minimize socio‐economic impacts. This study employs the Space Weather Modeling Framework (SWMF) to model the geomagnetic response over Fennoscandia to the 7‐8 September 2017 event. Of key importance to this study is the effects of spatial resolution in terms of regional forecasts and improved GIC modeling results. Therefore, we ran the model at comparatively low, medium, and high spatial resolutions. The virtual magnetometers from each model run are compared with observations from the IMAGE magnetometer network across various latitudes and over regional‐scales. The virtual magnetometer data from the SWMF are coupled with a local ground conductivity model which is used to calculate the geoelectric field and estimate GICs in a Finnish natural gas pipeline. This investigation has lead to several important results in which higher resolution yielded: 1) more realistic amplitudes and timings of GICs, 2) higher amplitude geomagnetic disturbances across latitudes, and 3) increased regional variations in terms of differences between stations. Despite this, substorms remain a significant challenge to surface magnetic field prediction from global MHD modeling. For example, in the presence of multiple large substorms, the associated large‐amplitude depressions were not captured, which caused the largest model‐data deviations. The results from this work are of key importance to both modelers and space weather operators. Particularly when the goal is to obtain improved regional forecasts of geomagnetic disturbances and/or more realistic estimates of the geoelectric field.
| Type: | Article |
|---|---|
| Title: | Modeling the geomagnetic response to the September 2017 space weather event over Fennoscandia using the Space Weather Modeling Framework: Studying the impacts of spatial resolution |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/2020sw002683 |
| Publisher version: | https://doi.org/10.1029/2020sw002683 |
| Language: | English |
| Additional information: | © 2021. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | Geomagnetic storm, space weather, GICs, model validation, SWMF, substorms |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10127287 |
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