Statistics of geomagnetic storms: Global simulations perspective
We present results of 131 geomagnetic storm simulations using the University of Michigan Space Weather Modeling Framework Geospace configuration. We compare the geomagnetic indices derived from the simulation with those observed, and use 2D cuts in the noon-midnight planes to compare the magnetopaus...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-09-01
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| Series: | Frontiers in Astronomy and Space Sciences |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fspas.2022.972150/full |
| _version_ | 1818029189012389888 |
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| author | Tuija I. Pulkkinen Austin Brenner Austin Brenner Qusai Al Shidi Gabor Toth |
| author_facet | Tuija I. Pulkkinen Austin Brenner Austin Brenner Qusai Al Shidi Gabor Toth |
| author_sort | Tuija I. Pulkkinen |
| collection | DOAJ |
| description | We present results of 131 geomagnetic storm simulations using the University of Michigan Space Weather Modeling Framework Geospace configuration. We compare the geomagnetic indices derived from the simulation with those observed, and use 2D cuts in the noon-midnight planes to compare the magnetopause locations with empirical models. We identify the location of the current sheet center and look at the plasma parameters to deduce tail dynamics. We show that the simulation produces geomagnetic index distributions similar to those observed, and that their relationship to the solar wind driver is similar to that observed. While the magnitudes of the Dst and polar cap potentials are close to those observed, the simulated AL index is consistently underestimated. Analysis of the magnetopause position reveals that the subsolar position agrees well with an empirical model, but that the tail flaring in the simulation is much smaller than that in the empirical model. The magnetotail and ring currents are closely correlated with the Dst index, and reveal a strong contribution of the tail current beyond 8 RE to the Dst index during the storm main phase. |
| first_indexed | 2024-12-10T05:15:44Z |
| format | Article |
| id | doaj.art-fbf96d33812f40139236cd24ebb76983 |
| institution | Directory Open Access Journal |
| issn | 2296-987X |
| language | English |
| last_indexed | 2024-12-10T05:15:44Z |
| publishDate | 2022-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Astronomy and Space Sciences |
| spelling | doaj.art-fbf96d33812f40139236cd24ebb769832022-12-22T02:00:58ZengFrontiers Media S.A.Frontiers in Astronomy and Space Sciences2296-987X2022-09-01910.3389/fspas.2022.972150972150Statistics of geomagnetic storms: Global simulations perspectiveTuija I. Pulkkinen0Austin Brenner1Austin Brenner2Qusai Al Shidi3Gabor Toth4Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United StatesDepartment of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United StatesDepartment of Aerospace Engineering, University of Michigan, Ann Arbor, MI, United StatesDepartment of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United StatesDepartment of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, United StatesWe present results of 131 geomagnetic storm simulations using the University of Michigan Space Weather Modeling Framework Geospace configuration. We compare the geomagnetic indices derived from the simulation with those observed, and use 2D cuts in the noon-midnight planes to compare the magnetopause locations with empirical models. We identify the location of the current sheet center and look at the plasma parameters to deduce tail dynamics. We show that the simulation produces geomagnetic index distributions similar to those observed, and that their relationship to the solar wind driver is similar to that observed. While the magnitudes of the Dst and polar cap potentials are close to those observed, the simulated AL index is consistently underestimated. Analysis of the magnetopause position reveals that the subsolar position agrees well with an empirical model, but that the tail flaring in the simulation is much smaller than that in the empirical model. The magnetotail and ring currents are closely correlated with the Dst index, and reveal a strong contribution of the tail current beyond 8 RE to the Dst index during the storm main phase.https://www.frontiersin.org/articles/10.3389/fspas.2022.972150/fullMHD simulationsmagnetosphere-ionophere couplingmagnetopausering currenttail currentgeomagnetic index and solar conditions |
| spellingShingle | Tuija I. Pulkkinen Austin Brenner Austin Brenner Qusai Al Shidi Gabor Toth Statistics of geomagnetic storms: Global simulations perspective Frontiers in Astronomy and Space Sciences MHD simulations magnetosphere-ionophere coupling magnetopause ring current tail current geomagnetic index and solar conditions |
| title | Statistics of geomagnetic storms: Global simulations perspective |
| title_full | Statistics of geomagnetic storms: Global simulations perspective |
| title_fullStr | Statistics of geomagnetic storms: Global simulations perspective |
| title_full_unstemmed | Statistics of geomagnetic storms: Global simulations perspective |
| title_short | Statistics of geomagnetic storms: Global simulations perspective |
| title_sort | statistics of geomagnetic storms global simulations perspective |
| topic | MHD simulations magnetosphere-ionophere coupling magnetopause ring current tail current geomagnetic index and solar conditions |
| url | https://www.frontiersin.org/articles/10.3389/fspas.2022.972150/full |
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