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Global MHD simulation of the magnetosphere for November 24, 1996
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| Zeitschriftentitel: | Journal of Geophysical Research: Space Physics |
|---|---|
| Personen und Körperschaften: | , , , |
| In: | Journal of Geophysical Research: Space Physics, 106, 2001, A1, S. 361-380 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Slinker, S. P. Fedder, J. A. Ruohoniemi, J. M. Lyon, J. G. Slinker, S. P. Fedder, J. A. Ruohoniemi, J. M. Lyon, J. G. |
|---|---|
| author |
Slinker, S. P. Fedder, J. A. Ruohoniemi, J. M. Lyon, J. G. |
| spellingShingle |
Slinker, S. P. Fedder, J. A. Ruohoniemi, J. M. Lyon, J. G. Journal of Geophysical Research: Space Physics Global MHD simulation of the magnetosphere for November 24, 1996 Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics |
| author_sort |
slinker, s. p. |
| spelling |
Slinker, S. P. Fedder, J. A. Ruohoniemi, J. M. Lyon, J. G. 0148-0227 American Geophysical Union (AGU) Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics http://dx.doi.org/10.1029/2000ja000603 <jats:p>Using Wind‐measured solar wind data, we have simulated the Earth's magnetosphere and ionosphere for the period 1930–2330 UT on November 24, 1996. The simulation model is a global, three‐dimensional, MHD formulation. This event is the focus of a Geospace Environment Modeling (GEM) substorm challenge. The event features a strongly northward interplanetary magnetic field (IMF) period, followed by a sudden rotation to steadily southward. About 80 min after the Wind‐observed north‐south transition a substorm was observed by the Polar‐visible imaging system (VIS). There was good data coverage throughout this period, and the modeling community was challenged to simulate the event. During the northward period the simulation produces a small open polar cap at high magnetic latitudes, especially on the dawnside, where a polar arc was observed by the Polar‐VIS and was reproduced in the simulation results. The simulation also shows the ionospheric response to the southward transition in the IMF propagate from the day side to the night side in only a few minutes, consistent with Super Dual Auroral Radar Network (SuperDARN) data. Later, the simulation also produces a substorm, but it occurs nearly a half hour earlier than was observed. Numerical experiments were performed by altering the solar wind IMF to investigate the sensitivity of substorm onset timing to this parameter. The model substorms occur spontaneously and do not show a strong correlation between an IMF‐induced convection reduction and the onset. The initial event in the expansion onset of the simulation substorm is the beginning of fast magnetic reconnection at ∼ 20 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub> in the stressed magnetotail.</jats:p> Global MHD simulation of the magnetosphere for November 24, 1996 Journal of Geophysical Research: Space Physics |
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Chemie und Pharmazie Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft Biologie Allgemeine Naturwissenschaft Physik Technik Geologie und Paläontologie Geographie |
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| title |
Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_unstemmed |
Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_full |
Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_fullStr |
Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_full_unstemmed |
Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_short |
Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_sort |
global mhd simulation of the magnetosphere for november 24, 1996 |
| topic |
Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics |
| url |
http://dx.doi.org/10.1029/2000ja000603 |
| publishDate |
2001 |
| physical |
361-380 |
| description |
<jats:p>Using Wind‐measured solar wind data, we have simulated the Earth's magnetosphere and ionosphere for the period 1930–2330 UT on November 24, 1996. The simulation model is a global, three‐dimensional, MHD formulation. This event is the focus of a Geospace Environment Modeling (GEM) substorm challenge. The event features a strongly northward interplanetary magnetic field (IMF) period, followed by a sudden rotation to steadily southward. About 80 min after the Wind‐observed north‐south transition a substorm was observed by the Polar‐visible imaging system (VIS). There was good data coverage throughout this period, and the modeling community was challenged to simulate the event. During the northward period the simulation produces a small open polar cap at high magnetic latitudes, especially on the dawnside, where a polar arc was observed by the Polar‐VIS and was reproduced in the simulation results. The simulation also shows the ionospheric response to the southward transition in the IMF propagate from the day side to the night side in only a few minutes, consistent with Super Dual Auroral Radar Network (SuperDARN) data. Later, the simulation also produces a substorm, but it occurs nearly a half hour earlier than was observed. Numerical experiments were performed by altering the solar wind IMF to investigate the sensitivity of substorm onset timing to this parameter. The model substorms occur spontaneously and do not show a strong correlation between an IMF‐induced convection reduction and the onset. The initial event in the expansion onset of the simulation substorm is the beginning of fast magnetic reconnection at ∼ 20 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub> in the stressed magnetotail.</jats:p> |
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| author | Slinker, S. P., Fedder, J. A., Ruohoniemi, J. M., Lyon, J. G. |
| author_facet | Slinker, S. P., Fedder, J. A., Ruohoniemi, J. M., Lyon, J. G., Slinker, S. P., Fedder, J. A., Ruohoniemi, J. M., Lyon, J. G. |
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| description | <jats:p>Using Wind‐measured solar wind data, we have simulated the Earth's magnetosphere and ionosphere for the period 1930–2330 UT on November 24, 1996. The simulation model is a global, three‐dimensional, MHD formulation. This event is the focus of a Geospace Environment Modeling (GEM) substorm challenge. The event features a strongly northward interplanetary magnetic field (IMF) period, followed by a sudden rotation to steadily southward. About 80 min after the Wind‐observed north‐south transition a substorm was observed by the Polar‐visible imaging system (VIS). There was good data coverage throughout this period, and the modeling community was challenged to simulate the event. During the northward period the simulation produces a small open polar cap at high magnetic latitudes, especially on the dawnside, where a polar arc was observed by the Polar‐VIS and was reproduced in the simulation results. The simulation also shows the ionospheric response to the southward transition in the IMF propagate from the day side to the night side in only a few minutes, consistent with Super Dual Auroral Radar Network (SuperDARN) data. Later, the simulation also produces a substorm, but it occurs nearly a half hour earlier than was observed. Numerical experiments were performed by altering the solar wind IMF to investigate the sensitivity of substorm onset timing to this parameter. The model substorms occur spontaneously and do not show a strong correlation between an IMF‐induced convection reduction and the onset. The initial event in the expansion onset of the simulation substorm is the beginning of fast magnetic reconnection at ∼ 20 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub> in the stressed magnetotail.</jats:p> |
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| institution | DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-D161, DE-Zwi2 |
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| spelling | Slinker, S. P. Fedder, J. A. Ruohoniemi, J. M. Lyon, J. G. 0148-0227 American Geophysical Union (AGU) Paleontology Space and Planetary Science Earth and Planetary Sciences (miscellaneous) Atmospheric Science Earth-Surface Processes Geochemistry and Petrology Soil Science Water Science and Technology Ecology Aquatic Science Forestry Oceanography Geophysics http://dx.doi.org/10.1029/2000ja000603 <jats:p>Using Wind‐measured solar wind data, we have simulated the Earth's magnetosphere and ionosphere for the period 1930–2330 UT on November 24, 1996. The simulation model is a global, three‐dimensional, MHD formulation. This event is the focus of a Geospace Environment Modeling (GEM) substorm challenge. The event features a strongly northward interplanetary magnetic field (IMF) period, followed by a sudden rotation to steadily southward. About 80 min after the Wind‐observed north‐south transition a substorm was observed by the Polar‐visible imaging system (VIS). There was good data coverage throughout this period, and the modeling community was challenged to simulate the event. During the northward period the simulation produces a small open polar cap at high magnetic latitudes, especially on the dawnside, where a polar arc was observed by the Polar‐VIS and was reproduced in the simulation results. The simulation also shows the ionospheric response to the southward transition in the IMF propagate from the day side to the night side in only a few minutes, consistent with Super Dual Auroral Radar Network (SuperDARN) data. Later, the simulation also produces a substorm, but it occurs nearly a half hour earlier than was observed. Numerical experiments were performed by altering the solar wind IMF to investigate the sensitivity of substorm onset timing to this parameter. The model substorms occur spontaneously and do not show a strong correlation between an IMF‐induced convection reduction and the onset. The initial event in the expansion onset of the simulation substorm is the beginning of fast magnetic reconnection at ∼ 20 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub> in the stressed magnetotail.</jats:p> Global MHD simulation of the magnetosphere for November 24, 1996 Journal of Geophysical Research: Space Physics |
| spellingShingle | Slinker, S. P., Fedder, J. A., Ruohoniemi, J. M., Lyon, J. G., Journal of Geophysical Research: Space Physics, Global MHD simulation of the magnetosphere for November 24, 1996, Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics |
| title | Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_full | Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_fullStr | Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_full_unstemmed | Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_short | Global MHD simulation of the magnetosphere for November 24, 1996 |
| title_sort | global mhd simulation of the magnetosphere for november 24, 1996 |
| title_unstemmed | Global MHD simulation of the magnetosphere for November 24, 1996 |
| topic | Paleontology, Space and Planetary Science, Earth and Planetary Sciences (miscellaneous), Atmospheric Science, Earth-Surface Processes, Geochemistry and Petrology, Soil Science, Water Science and Technology, Ecology, Aquatic Science, Forestry, Oceanography, Geophysics |
| url | http://dx.doi.org/10.1029/2000ja000603 |