Studies of magnetotail dynamics and energy evolution during substorms using MHD simulations
We examine the distribution and propagation of energy in the plasma sheet and lobes using observations and simulations for three substorms. The substorms occurred on 9 March 1995, 10 December 1996, and 27 August 2001 and have been simulated using the Lyon-Fedder-Mobarry magneto-hydrodynamic code. Al...
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2009
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ftdoajarticles:oai:doaj.org/article:ba958b5a3de144a9ab2371b74d8c47c7 2023-05-15T16:29:22+02:00 Studies of magnetotail dynamics and energy evolution during substorms using MHD simulations S. Brogl R. E. Lopez M. Wiltberger H. K. Rassoul 2009-04-01T00:00:00Z https://doi.org/10.5194/angeo-27-1717-2009 https://doaj.org/article/ba958b5a3de144a9ab2371b74d8c47c7 EN eng Copernicus Publications https://www.ann-geophys.net/27/1717/2009/angeo-27-1717-2009.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-27-1717-2009 0992-7689 1432-0576 https://doaj.org/article/ba958b5a3de144a9ab2371b74d8c47c7 Annales Geophysicae, Vol 27, Pp 1717-1727 (2009) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2009 ftdoajarticles https://doi.org/10.5194/angeo-27-1717-2009 2023-01-08T01:29:24Z We examine the distribution and propagation of energy in the plasma sheet and lobes using observations and simulations for three substorms. The substorms occurred on 9 March 1995, 10 December 1996, and 27 August 2001 and have been simulated using the Lyon-Fedder-Mobarry magneto-hydrodynamic code. All three events occur over North America and show a clear substorm current wedge over the ground magnetometer chains of Alaska, Canada, and Greenland. The three simulations show the thinning of the plasma sheet during the growth phase of the event and an increase in the relative amount of thermal energy due to the compression of the plasma sheet. Generally, the total lobe energy, polar cap flux, and lobe magnetic field strength simultaneously increase during the growth phase, and polar cap flux and total lobe energy only start dropping at substorm onset, as measured by the CANOPUS magnetometer chain. Starting at time of onset and continuing throughout the expansion phase a transfer of magnetic energy from the lobes into the plasma sheet occurs, with the increase in the plasma sheet energy ranging from 30–40% of the energy that is released from the lobes. Article in Journal/Newspaper Greenland Alaska Directory of Open Access Journals: DOAJ Articles Canada Canopus ENVELOPE(161.517,161.517,-77.550,-77.550) Greenland Annales Geophysicae 27 4 1717 1727 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 S. Brogl R. E. Lopez M. Wiltberger H. K. Rassoul Studies of magnetotail dynamics and energy evolution during substorms using MHD simulations |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
We examine the distribution and propagation of energy in the plasma sheet and lobes using observations and simulations for three substorms. The substorms occurred on 9 March 1995, 10 December 1996, and 27 August 2001 and have been simulated using the Lyon-Fedder-Mobarry magneto-hydrodynamic code. All three events occur over North America and show a clear substorm current wedge over the ground magnetometer chains of Alaska, Canada, and Greenland. The three simulations show the thinning of the plasma sheet during the growth phase of the event and an increase in the relative amount of thermal energy due to the compression of the plasma sheet. Generally, the total lobe energy, polar cap flux, and lobe magnetic field strength simultaneously increase during the growth phase, and polar cap flux and total lobe energy only start dropping at substorm onset, as measured by the CANOPUS magnetometer chain. Starting at time of onset and continuing throughout the expansion phase a transfer of magnetic energy from the lobes into the plasma sheet occurs, with the increase in the plasma sheet energy ranging from 30–40% of the energy that is released from the lobes. |
format |
Article in Journal/Newspaper |
author |
S. Brogl R. E. Lopez M. Wiltberger H. K. Rassoul |
author_facet |
S. Brogl R. E. Lopez M. Wiltberger H. K. Rassoul |
author_sort |
S. Brogl |
title |
Studies of magnetotail dynamics and energy evolution during substorms using MHD simulations |
title_short |
Studies of magnetotail dynamics and energy evolution during substorms using MHD simulations |
title_full |
Studies of magnetotail dynamics and energy evolution during substorms using MHD simulations |
title_fullStr |
Studies of magnetotail dynamics and energy evolution during substorms using MHD simulations |
title_full_unstemmed |
Studies of magnetotail dynamics and energy evolution during substorms using MHD simulations |
title_sort |
studies of magnetotail dynamics and energy evolution during substorms using mhd simulations |
publisher |
Copernicus Publications |
publishDate |
2009 |
url |
https://doi.org/10.5194/angeo-27-1717-2009 https://doaj.org/article/ba958b5a3de144a9ab2371b74d8c47c7 |
long_lat |
ENVELOPE(161.517,161.517,-77.550,-77.550) |
geographic |
Canada Canopus Greenland |
geographic_facet |
Canada Canopus Greenland |
genre |
Greenland Alaska |
genre_facet |
Greenland Alaska |
op_source |
Annales Geophysicae, Vol 27, Pp 1717-1727 (2009) |
op_relation |
https://www.ann-geophys.net/27/1717/2009/angeo-27-1717-2009.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-27-1717-2009 0992-7689 1432-0576 https://doaj.org/article/ba958b5a3de144a9ab2371b74d8c47c7 |
op_doi |
https://doi.org/10.5194/angeo-27-1717-2009 |
container_title |
Annales Geophysicae |
container_volume |
27 |
container_issue |
4 |
container_start_page |
1717 |
op_container_end_page |
1727 |
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1766019069396385792 |