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Global simulation of proton precipitation due to field line curvature during substorms
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| Zeitschriftentitel: | Journal of Geophysical Research: Space Physics |
|---|---|
| Personen und Körperschaften: | , , , , |
| In: | Journal of Geophysical Research: Space Physics, 117, 2012, A5 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
|
| Schlagwörter: |
| author_facet |
Gilson, M. L. Raeder, J. Donovan, E. Ge, Y. S. Kepko, L. Gilson, M. L. Raeder, J. Donovan, E. Ge, Y. S. Kepko, L. |
|---|---|
| author |
Gilson, M. L. Raeder, J. Donovan, E. Ge, Y. S. Kepko, L. |
| spellingShingle |
Gilson, M. L. Raeder, J. Donovan, E. Ge, Y. S. Kepko, L. Journal of Geophysical Research: Space Physics Global simulation of proton precipitation due to field line curvature during substorms 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 |
gilson, m. l. |
| spelling |
Gilson, M. L. Raeder, J. Donovan, E. Ge, Y. S. Kepko, L. 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/10.1029/2012ja017562 <jats:p>The low latitude boundary of the proton aurora (known as the Isotropy Boundary or IB) marks an important boundary between empty and full downgoing loss cones. There is significant evidence that the IB maps to a region in the magnetosphere where the ion gyroradius becomes comparable to the local field line curvature. However, the location of the IB in the magnetosphere remains in question. In this paper, we show simulated proton precipitation derived from the Field Line Curvature (FLC) model of proton scattering and a global magnetohydrodynamic simulation during two substorms. The simulated proton precipitation drifts equatorward during the growth phase, intensifies at onset and reproduces the azimuthal splitting published in previous studies. In the simulation, the pre‐onset IB maps to 7–8 R<jats:sub>E</jats:sub> for the substorms presented and the azimuthal splitting is caused by the development of the substorm current wedge. The simulation also demonstrates that the central plasma sheet temperature can significantly influence when and where the azimuthal splitting takes place.</jats:p> Global simulation of proton precipitation due to field line curvature during substorms Journal of Geophysical Research: Space Physics |
| doi_str_mv |
10.1029/2012ja017562 |
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Online Free |
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Physik Technik Geologie und Paläontologie Geographie Chemie und Pharmazie Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft Biologie Allgemeine Naturwissenschaft |
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American Geophysical Union (AGU), 2012 |
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American Geophysical Union (AGU), 2012 |
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| title |
Global simulation of proton precipitation due to field line curvature during substorms |
| title_unstemmed |
Global simulation of proton precipitation due to field line curvature during substorms |
| title_full |
Global simulation of proton precipitation due to field line curvature during substorms |
| title_fullStr |
Global simulation of proton precipitation due to field line curvature during substorms |
| title_full_unstemmed |
Global simulation of proton precipitation due to field line curvature during substorms |
| title_short |
Global simulation of proton precipitation due to field line curvature during substorms |
| title_sort |
global simulation of proton precipitation due to field line curvature during substorms |
| 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/10.1029/2012ja017562 |
| publishDate |
2012 |
| physical |
|
| description |
<jats:p>The low latitude boundary of the proton aurora (known as the Isotropy Boundary or IB) marks an important boundary between empty and full downgoing loss cones. There is significant evidence that the IB maps to a region in the magnetosphere where the ion gyroradius becomes comparable to the local field line curvature. However, the location of the IB in the magnetosphere remains in question. In this paper, we show simulated proton precipitation derived from the Field Line Curvature (FLC) model of proton scattering and a global magnetohydrodynamic simulation during two substorms. The simulated proton precipitation drifts equatorward during the growth phase, intensifies at onset and reproduces the azimuthal splitting published in previous studies. In the simulation, the pre‐onset IB maps to 7–8 R<jats:sub>E</jats:sub> for the substorms presented and the azimuthal splitting is caused by the development of the substorm current wedge. The simulation also demonstrates that the central plasma sheet temperature can significantly influence when and where the azimuthal splitting takes place.</jats:p> |
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| author | Gilson, M. L., Raeder, J., Donovan, E., Ge, Y. S., Kepko, L. |
| author_facet | Gilson, M. L., Raeder, J., Donovan, E., Ge, Y. S., Kepko, L., Gilson, M. L., Raeder, J., Donovan, E., Ge, Y. S., Kepko, L. |
| author_sort | gilson, m. l. |
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| description | <jats:p>The low latitude boundary of the proton aurora (known as the Isotropy Boundary or IB) marks an important boundary between empty and full downgoing loss cones. There is significant evidence that the IB maps to a region in the magnetosphere where the ion gyroradius becomes comparable to the local field line curvature. However, the location of the IB in the magnetosphere remains in question. In this paper, we show simulated proton precipitation derived from the Field Line Curvature (FLC) model of proton scattering and a global magnetohydrodynamic simulation during two substorms. The simulated proton precipitation drifts equatorward during the growth phase, intensifies at onset and reproduces the azimuthal splitting published in previous studies. In the simulation, the pre‐onset IB maps to 7–8 R<jats:sub>E</jats:sub> for the substorms presented and the azimuthal splitting is caused by the development of the substorm current wedge. The simulation also demonstrates that the central plasma sheet temperature can significantly influence when and where the azimuthal splitting takes place.</jats:p> |
| doi_str_mv | 10.1029/2012ja017562 |
| facet_avail | Online, Free |
| finc_class_facet | Physik, Technik, Geologie und Paläontologie, Geographie, Chemie und Pharmazie, Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft, Biologie, Allgemeine Naturwissenschaft |
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| imprint | American Geophysical Union (AGU), 2012 |
| imprint_str_mv | American Geophysical Union (AGU), 2012 |
| institution | DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229, DE-D275 |
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| physical | |
| publishDate | 2012 |
| publishDateSort | 2012 |
| publisher | American Geophysical Union (AGU) |
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| series | Journal of Geophysical Research: Space Physics |
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| spelling | Gilson, M. L. Raeder, J. Donovan, E. Ge, Y. S. Kepko, L. 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/10.1029/2012ja017562 <jats:p>The low latitude boundary of the proton aurora (known as the Isotropy Boundary or IB) marks an important boundary between empty and full downgoing loss cones. There is significant evidence that the IB maps to a region in the magnetosphere where the ion gyroradius becomes comparable to the local field line curvature. However, the location of the IB in the magnetosphere remains in question. In this paper, we show simulated proton precipitation derived from the Field Line Curvature (FLC) model of proton scattering and a global magnetohydrodynamic simulation during two substorms. The simulated proton precipitation drifts equatorward during the growth phase, intensifies at onset and reproduces the azimuthal splitting published in previous studies. In the simulation, the pre‐onset IB maps to 7–8 R<jats:sub>E</jats:sub> for the substorms presented and the azimuthal splitting is caused by the development of the substorm current wedge. The simulation also demonstrates that the central plasma sheet temperature can significantly influence when and where the azimuthal splitting takes place.</jats:p> Global simulation of proton precipitation due to field line curvature during substorms Journal of Geophysical Research: Space Physics |
| spellingShingle | Gilson, M. L., Raeder, J., Donovan, E., Ge, Y. S., Kepko, L., Journal of Geophysical Research: Space Physics, Global simulation of proton precipitation due to field line curvature during substorms, 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 simulation of proton precipitation due to field line curvature during substorms |
| title_full | Global simulation of proton precipitation due to field line curvature during substorms |
| title_fullStr | Global simulation of proton precipitation due to field line curvature during substorms |
| title_full_unstemmed | Global simulation of proton precipitation due to field line curvature during substorms |
| title_short | Global simulation of proton precipitation due to field line curvature during substorms |
| title_sort | global simulation of proton precipitation due to field line curvature during substorms |
| title_unstemmed | Global simulation of proton precipitation due to field line curvature during substorms |
| 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/10.1029/2012ja017562 |