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Statistical study of substorm timing sequence
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| Zeitschriftentitel: | Journal of Geophysical Research: Space Physics |
|---|---|
| Personen und Körperschaften: | , , , , , , |
| In: | Journal of Geophysical Research: Space Physics, 114, 2009, A12 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
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| Schlagwörter: |
| author_facet |
Lin, Naiguo Frey, H. U. Mende, S. B. Mozer, F. S. Lysak, R. L. Song, Y. Angelopoulos, V. Lin, Naiguo Frey, H. U. Mende, S. B. Mozer, F. S. Lysak, R. L. Song, Y. Angelopoulos, V. |
|---|---|
| author |
Lin, Naiguo Frey, H. U. Mende, S. B. Mozer, F. S. Lysak, R. L. Song, Y. Angelopoulos, V. |
| spellingShingle |
Lin, Naiguo Frey, H. U. Mende, S. B. Mozer, F. S. Lysak, R. L. Song, Y. Angelopoulos, V. Journal of Geophysical Research: Space Physics Statistical study of substorm timing sequence 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 |
lin, naiguo |
| spelling |
Lin, Naiguo Frey, H. U. Mende, S. B. Mozer, F. S. Lysak, R. L. Song, Y. Angelopoulos, V. 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/10.1029/2009ja014381 <jats:p>Observations of timing sequences of substorms expected in various onset mechanisms are examined by using a space‐time diagram, which correlates observed space signatures and auroral signatures on the ground during substorm onset. Results from a statistical study of 11 substorms show that signatures in the midtail (<jats:italic>x</jats:italic> ∼ 15–25 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub>) typically occur before the ground signatures and those in the near‐Earth tail (<jats:italic>x</jats:italic> ∼ 10 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub>) and that signatures in the midtail region observed prior to the substorm onset often occur at a time which was shorter than that expected from MHD wave propagation between the different regions. This suggests that the disturbance onsets in different active regions do not seem to have a simple causal relationship between them as described by the reconnection or current disruption models of substorms. The activation of perturbed fields and plasma flows in space including the signatures of reconnection and current disruption may occur in multiple localized regions throughout the stressed tail current sheet. The activation seems to be continuously observed well after the substorm onset. These results to some extent are consistent with suggested global Alfvénic interaction considerations, in which the substorm onset is the result of Alfvénic interaction in the global current systems.</jats:p> Statistical study of substorm timing sequence Journal of Geophysical Research: Space Physics |
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10.1029/2009ja014381 |
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Allgemeine Naturwissenschaft Physik Technik Geologie und Paläontologie Geographie Chemie und Pharmazie Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft Biologie |
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Statistical study of substorm timing sequence |
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Statistical study of substorm timing sequence |
| title_full |
Statistical study of substorm timing sequence |
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Statistical study of substorm timing sequence |
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Statistical study of substorm timing sequence |
| title_short |
Statistical study of substorm timing sequence |
| title_sort |
statistical study of substorm timing sequence |
| 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/10.1029/2009ja014381 |
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2009 |
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<jats:p>Observations of timing sequences of substorms expected in various onset mechanisms are examined by using a space‐time diagram, which correlates observed space signatures and auroral signatures on the ground during substorm onset. Results from a statistical study of 11 substorms show that signatures in the midtail (<jats:italic>x</jats:italic> ∼ 15–25 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub>) typically occur before the ground signatures and those in the near‐Earth tail (<jats:italic>x</jats:italic> ∼ 10 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub>) and that signatures in the midtail region observed prior to the substorm onset often occur at a time which was shorter than that expected from MHD wave propagation between the different regions. This suggests that the disturbance onsets in different active regions do not seem to have a simple causal relationship between them as described by the reconnection or current disruption models of substorms. The activation of perturbed fields and plasma flows in space including the signatures of reconnection and current disruption may occur in multiple localized regions throughout the stressed tail current sheet. The activation seems to be continuously observed well after the substorm onset. These results to some extent are consistent with suggested global Alfvénic interaction considerations, in which the substorm onset is the result of Alfvénic interaction in the global current systems.</jats:p> |
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| author | Lin, Naiguo, Frey, H. U., Mende, S. B., Mozer, F. S., Lysak, R. L., Song, Y., Angelopoulos, V. |
| author_facet | Lin, Naiguo, Frey, H. U., Mende, S. B., Mozer, F. S., Lysak, R. L., Song, Y., Angelopoulos, V., Lin, Naiguo, Frey, H. U., Mende, S. B., Mozer, F. S., Lysak, R. L., Song, Y., Angelopoulos, V. |
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| description | <jats:p>Observations of timing sequences of substorms expected in various onset mechanisms are examined by using a space‐time diagram, which correlates observed space signatures and auroral signatures on the ground during substorm onset. Results from a statistical study of 11 substorms show that signatures in the midtail (<jats:italic>x</jats:italic> ∼ 15–25 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub>) typically occur before the ground signatures and those in the near‐Earth tail (<jats:italic>x</jats:italic> ∼ 10 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub>) and that signatures in the midtail region observed prior to the substorm onset often occur at a time which was shorter than that expected from MHD wave propagation between the different regions. This suggests that the disturbance onsets in different active regions do not seem to have a simple causal relationship between them as described by the reconnection or current disruption models of substorms. The activation of perturbed fields and plasma flows in space including the signatures of reconnection and current disruption may occur in multiple localized regions throughout the stressed tail current sheet. The activation seems to be continuously observed well after the substorm onset. These results to some extent are consistent with suggested global Alfvénic interaction considerations, in which the substorm onset is the result of Alfvénic interaction in the global current systems.</jats:p> |
| doi_str_mv | 10.1029/2009ja014381 |
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| imprint_str_mv | American Geophysical Union (AGU), 2009 |
| institution | DE-D275, DE-Bn3, DE-Brt1, DE-D161, DE-Zwi2, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1, DE-L229 |
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| spelling | Lin, Naiguo Frey, H. U. Mende, S. B. Mozer, F. S. Lysak, R. L. Song, Y. Angelopoulos, V. 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/10.1029/2009ja014381 <jats:p>Observations of timing sequences of substorms expected in various onset mechanisms are examined by using a space‐time diagram, which correlates observed space signatures and auroral signatures on the ground during substorm onset. Results from a statistical study of 11 substorms show that signatures in the midtail (<jats:italic>x</jats:italic> ∼ 15–25 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub>) typically occur before the ground signatures and those in the near‐Earth tail (<jats:italic>x</jats:italic> ∼ 10 <jats:italic>R</jats:italic><jats:sub><jats:italic>E</jats:italic></jats:sub>) and that signatures in the midtail region observed prior to the substorm onset often occur at a time which was shorter than that expected from MHD wave propagation between the different regions. This suggests that the disturbance onsets in different active regions do not seem to have a simple causal relationship between them as described by the reconnection or current disruption models of substorms. The activation of perturbed fields and plasma flows in space including the signatures of reconnection and current disruption may occur in multiple localized regions throughout the stressed tail current sheet. The activation seems to be continuously observed well after the substorm onset. These results to some extent are consistent with suggested global Alfvénic interaction considerations, in which the substorm onset is the result of Alfvénic interaction in the global current systems.</jats:p> Statistical study of substorm timing sequence Journal of Geophysical Research: Space Physics |
| spellingShingle | Lin, Naiguo, Frey, H. U., Mende, S. B., Mozer, F. S., Lysak, R. L., Song, Y., Angelopoulos, V., Journal of Geophysical Research: Space Physics, Statistical study of substorm timing sequence, 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 | Statistical study of substorm timing sequence |
| title_full | Statistical study of substorm timing sequence |
| title_fullStr | Statistical study of substorm timing sequence |
| title_full_unstemmed | Statistical study of substorm timing sequence |
| title_short | Statistical study of substorm timing sequence |
| title_sort | statistical study of substorm timing sequence |
| title_unstemmed | Statistical study of substorm timing sequence |
| 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/10.1029/2009ja014381 |