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Modeling the Geomag...
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
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- Dimmock, Andrew P. (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Welling, D. T. (författare)
- Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA.
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- Rosenqvist, L. (författare)
- Swedish Def Res Agcy, Stockholm, Sweden.
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- Forsyth, C. (författare)
- UCL Mullard Space Sci Lab, Dorking, Surrey, England.
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- Freeman, M. P. (författare)
- British Antarctic Survey, Cambridge, England.
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- Rae, I. J. (författare)
- UCL Mullard Space Sci Lab, Dorking, Surrey, England.;Northumbria Univ, Newcastle Upon Tyne, Tyne & Wear, England.
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- Viljanen, A. (författare)
- Finnish Meteorol Inst, Helsinki, Finland.
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- Vandegriff, E. (författare)
- Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA.
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- Boynton, R. J. (författare)
- Univ Sheffield, Dept Automat Control & Syst Engn, Sheffield, S Yorkshire, England.
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- Balikhin, M. A. (författare)
- Univ Sheffield, Dept Automat Control & Syst Engn, Sheffield, S Yorkshire, England.
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- Yordanova, Emiliya (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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(creator_code:org_t)
- American Geophysical Union (AGU), 2021
- 2021
- Engelska.
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Ingår i: Space Weather. - : American Geophysical Union (AGU). - 1542-7390. ; 19:5
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We must be able to predict and mitigate against geomagnetically induced current (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 September 7-8, 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 magnetohydrodynamic 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.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
Nyckelord
- Geomagnetic storm
- GICs
- model validation
- space weather
- substorms
- SWMF
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Dimmock, Andrew ...
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Welling, D. T.
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Rosenqvist, L.
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Forsyth, C.
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Freeman, M. P.
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Rae, I. J.
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visa fler...
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Viljanen, A.
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Vandegriff, E.
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Boynton, R. J.
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Balikhin, M. A.
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Yordanova, Emili ...
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visa färre...
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