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The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation
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| Zeitschriftentitel: | Journal of Geophysical Research: Space Physics |
|---|---|
| Personen und Körperschaften: | , , , , , , , , |
| In: | Journal of Geophysical Research: Space Physics, 103, 1998, A5, S. 9121-9141 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
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| Schlagwörter: |
| author_facet |
Berchem, J. Raeder, J. Ashour‐Abdalla, M. Frank, L. A. Paterson, W. R. Ackerson, K. L. Kokubun, S. Yamamoto, T. Lepping, R. P. Berchem, J. Raeder, J. Ashour‐Abdalla, M. Frank, L. A. Paterson, W. R. Ackerson, K. L. Kokubun, S. Yamamoto, T. Lepping, R. P. |
|---|---|
| author |
Berchem, J. Raeder, J. Ashour‐Abdalla, M. Frank, L. A. Paterson, W. R. Ackerson, K. L. Kokubun, S. Yamamoto, T. Lepping, R. P. |
| spellingShingle |
Berchem, J. Raeder, J. Ashour‐Abdalla, M. Frank, L. A. Paterson, W. R. Ackerson, K. L. Kokubun, S. Yamamoto, T. Lepping, R. P. Journal of Geophysical Research: Space Physics The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation 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 |
berchem, j. |
| spelling |
Berchem, J. Raeder, J. Ashour‐Abdalla, M. Frank, L. A. Paterson, W. R. Ackerson, K. L. Kokubun, S. Yamamoto, T. Lepping, R. P. 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/10.1029/97ja02926 <jats:p>This paper reports a comparison between Geotail observations of plasmas and magnetic fields at 200 <jats:italic>R<jats:sub>E</jats:sub></jats:italic> in the Earth's magnetotail with results from a time‐dependent, global magnetohydrodynamic (MHD) simulation of the interaction of the solar wind with the magnetosphere. The study focuses on observations from July 7, 1993, during which the Geotail spacecraft crossed the distant tail magnetospheric boundary several times while the interplanetary magnetic field (IMF) was predominantly northward and was marked by slow rotations of its clock angle. Simultaneous IMP 8 observations of solar wind ions and the IMF were used as driving input for the MHD simulation, and the resulting time series were compared directly with those from the Geotail spacecraft. The very good agreement found provided the basis for an investigation of the response of the distant tail associated with the clock angle of the IMF. Results from the simulation show that the stresses imposed by the draping of magnetosheath field lines and the asymmetric removal of magnetic flux tailward of the cusps altered considerably the shape of the distant tail as the solar wind discontinuities convected downstream of Earth. As a result, the cross section of the distant tail was considerably flattened along the direction perpendicular to the IMF clock angle, the direction of the neutral sheet following that of the IMF. The simulation also revealed that the combined action of magnetic reconnection and the slow rotation of the IMF clock angle led to a braiding of the distant tail's magnetic field lines along the axis of the tail, with the plane of the braid lying in the direction of the IMF.</jats:p> The distant tail at 200 <i>R<sub>E</sub></i>: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation Journal of Geophysical Research: Space Physics |
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| title |
The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_unstemmed |
The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_full |
The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_fullStr |
The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_full_unstemmed |
The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_short |
The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_sort |
the distant tail at 200 <i>r<sub>e</sub></i>: comparison between geotail observations and the results from a global magnetohydrodynamic simulation |
| 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/10.1029/97ja02926 |
| publishDate |
1998 |
| physical |
9121-9141 |
| description |
<jats:p>This paper reports a comparison between Geotail observations of plasmas and magnetic fields at 200 <jats:italic>R<jats:sub>E</jats:sub></jats:italic> in the Earth's magnetotail with results from a time‐dependent, global magnetohydrodynamic (MHD) simulation of the interaction of the solar wind with the magnetosphere. The study focuses on observations from July 7, 1993, during which the Geotail spacecraft crossed the distant tail magnetospheric boundary several times while the interplanetary magnetic field (IMF) was predominantly northward and was marked by slow rotations of its clock angle. Simultaneous IMP 8 observations of solar wind ions and the IMF were used as driving input for the MHD simulation, and the resulting time series were compared directly with those from the Geotail spacecraft. The very good agreement found provided the basis for an investigation of the response of the distant tail associated with the clock angle of the IMF. Results from the simulation show that the stresses imposed by the draping of magnetosheath field lines and the asymmetric removal of magnetic flux tailward of the cusps altered considerably the shape of the distant tail as the solar wind discontinuities convected downstream of Earth. As a result, the cross section of the distant tail was considerably flattened along the direction perpendicular to the IMF clock angle, the direction of the neutral sheet following that of the IMF. The simulation also revealed that the combined action of magnetic reconnection and the slow rotation of the IMF clock angle led to a braiding of the distant tail's magnetic field lines along the axis of the tail, with the plane of the braid lying in the direction of the IMF.</jats:p> |
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| author | Berchem, J., Raeder, J., Ashour‐Abdalla, M., Frank, L. A., Paterson, W. R., Ackerson, K. L., Kokubun, S., Yamamoto, T., Lepping, R. P. |
| author_facet | Berchem, J., Raeder, J., Ashour‐Abdalla, M., Frank, L. A., Paterson, W. R., Ackerson, K. L., Kokubun, S., Yamamoto, T., Lepping, R. P., Berchem, J., Raeder, J., Ashour‐Abdalla, M., Frank, L. A., Paterson, W. R., Ackerson, K. L., Kokubun, S., Yamamoto, T., Lepping, R. P. |
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| description | <jats:p>This paper reports a comparison between Geotail observations of plasmas and magnetic fields at 200 <jats:italic>R<jats:sub>E</jats:sub></jats:italic> in the Earth's magnetotail with results from a time‐dependent, global magnetohydrodynamic (MHD) simulation of the interaction of the solar wind with the magnetosphere. The study focuses on observations from July 7, 1993, during which the Geotail spacecraft crossed the distant tail magnetospheric boundary several times while the interplanetary magnetic field (IMF) was predominantly northward and was marked by slow rotations of its clock angle. Simultaneous IMP 8 observations of solar wind ions and the IMF were used as driving input for the MHD simulation, and the resulting time series were compared directly with those from the Geotail spacecraft. The very good agreement found provided the basis for an investigation of the response of the distant tail associated with the clock angle of the IMF. Results from the simulation show that the stresses imposed by the draping of magnetosheath field lines and the asymmetric removal of magnetic flux tailward of the cusps altered considerably the shape of the distant tail as the solar wind discontinuities convected downstream of Earth. As a result, the cross section of the distant tail was considerably flattened along the direction perpendicular to the IMF clock angle, the direction of the neutral sheet following that of the IMF. The simulation also revealed that the combined action of magnetic reconnection and the slow rotation of the IMF clock angle led to a braiding of the distant tail's magnetic field lines along the axis of the tail, with the plane of the braid lying in the direction of the IMF.</jats:p> |
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| imprint_str_mv | American Geophysical Union (AGU), 1998 |
| institution | DE-Zi4, DE-Gla1, DE-15, DE-Pl11, DE-Rs1, DE-14, DE-105, DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161 |
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| physical | 9121-9141 |
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| spelling | Berchem, J. Raeder, J. Ashour‐Abdalla, M. Frank, L. A. Paterson, W. R. Ackerson, K. L. Kokubun, S. Yamamoto, T. Lepping, R. P. 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/10.1029/97ja02926 <jats:p>This paper reports a comparison between Geotail observations of plasmas and magnetic fields at 200 <jats:italic>R<jats:sub>E</jats:sub></jats:italic> in the Earth's magnetotail with results from a time‐dependent, global magnetohydrodynamic (MHD) simulation of the interaction of the solar wind with the magnetosphere. The study focuses on observations from July 7, 1993, during which the Geotail spacecraft crossed the distant tail magnetospheric boundary several times while the interplanetary magnetic field (IMF) was predominantly northward and was marked by slow rotations of its clock angle. Simultaneous IMP 8 observations of solar wind ions and the IMF were used as driving input for the MHD simulation, and the resulting time series were compared directly with those from the Geotail spacecraft. The very good agreement found provided the basis for an investigation of the response of the distant tail associated with the clock angle of the IMF. Results from the simulation show that the stresses imposed by the draping of magnetosheath field lines and the asymmetric removal of magnetic flux tailward of the cusps altered considerably the shape of the distant tail as the solar wind discontinuities convected downstream of Earth. As a result, the cross section of the distant tail was considerably flattened along the direction perpendicular to the IMF clock angle, the direction of the neutral sheet following that of the IMF. The simulation also revealed that the combined action of magnetic reconnection and the slow rotation of the IMF clock angle led to a braiding of the distant tail's magnetic field lines along the axis of the tail, with the plane of the braid lying in the direction of the IMF.</jats:p> The distant tail at 200 <i>R<sub>E</sub></i>: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation Journal of Geophysical Research: Space Physics |
| spellingShingle | Berchem, J., Raeder, J., Ashour‐Abdalla, M., Frank, L. A., Paterson, W. R., Ackerson, K. L., Kokubun, S., Yamamoto, T., Lepping, R. P., Journal of Geophysical Research: Space Physics, The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation, 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 | The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_full | The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_fullStr | The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_full_unstemmed | The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_short | The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| title_sort | the distant tail at 200 <i>r<sub>e</sub></i>: comparison between geotail observations and the results from a global magnetohydrodynamic simulation |
| title_unstemmed | The distant tail at 200 RE: Comparison between Geotail observations and the results from a global magnetohydrodynamic simulation |
| 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/10.1029/97ja02926 |