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Two‐dimensional ionospheric flow pattern associated with auroral streamers
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| Zeitschriftentitel: | Journal of Geophysical Research: Space Physics |
|---|---|
| Personen und Körperschaften: | , , , , , , , |
| In: | Journal of Geophysical Research: Space Physics, 117, 2012, A2 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
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| Schlagwörter: |
| author_facet |
Shi, Yong Zesta, Eftyhia Lyons, Larry R. Yang, J. Boudouridis, A. Ge, Y. S. Ruohoniemi, J. M. Mende, S. Shi, Yong Zesta, Eftyhia Lyons, Larry R. Yang, J. Boudouridis, A. Ge, Y. S. Ruohoniemi, J. M. Mende, S. |
|---|---|
| author |
Shi, Yong Zesta, Eftyhia Lyons, Larry R. Yang, J. Boudouridis, A. Ge, Y. S. Ruohoniemi, J. M. Mende, S. |
| spellingShingle |
Shi, Yong Zesta, Eftyhia Lyons, Larry R. Yang, J. Boudouridis, A. Ge, Y. S. Ruohoniemi, J. M. Mende, S. Journal of Geophysical Research: Space Physics Two‐dimensional ionospheric flow pattern associated with auroral streamers 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 |
shi, yong |
| spelling |
Shi, Yong Zesta, Eftyhia Lyons, Larry R. Yang, J. Boudouridis, A. Ge, Y. S. Ruohoniemi, J. M. Mende, S. 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/10.1029/2011ja017110 <jats:p>We present direct two‐dimensional flow observations and auroral images from the Super Dual Auroral Radar Network (SuperDARN) radar and Wideband Imaging Camera onboard Imager for Magnetopause‐to‐Aurora Global Exploration (IMAGE/WIC) imager to investigate the ionospheric flow pattern associated with auroral streamers for four events. Using the SuperDARN observations allows us to observe the flow associated with the streamers in the context of the larger‐scale background convection. For all four cases studied, streamers developed from preexisting east‐west (EW) arcs that initiated from bead‐like or small‐scale auroral intensifications around the auroral poleward boundary. We find a vortex‐like flow pattern with clockwise sense surrounding both the initial auroral forms and the ensuing streamers. We also found in three cases signatures of flow bifurcations at the equatorward end of the streamers, which suggests a double vortex‐like flow pattern with the counterclockwise vortex east of the clockwise one. Our results are consistent with the double‐vortex flow structure that results from interchange convection associated with a plasma sheet bubble predicted by different numerical simulations. This supports several previous studies and offers more complete observational evidence that the observed flow pattern may be the ionospheric manifestation of interchange instability in the plasma sheet.</jats:p> Two‐dimensional ionospheric flow pattern associated with auroral streamers Journal of Geophysical Research: Space Physics |
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10.1029/2011ja017110 |
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Biologie Allgemeine Naturwissenschaft Physik Technik Geologie und Paläontologie Geographie Chemie und Pharmazie Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft |
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| title |
Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_unstemmed |
Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_full |
Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_fullStr |
Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_full_unstemmed |
Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_short |
Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_sort |
two‐dimensional ionospheric flow pattern associated with auroral streamers |
| 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/10.1029/2011ja017110 |
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2012 |
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<jats:p>We present direct two‐dimensional flow observations and auroral images from the Super Dual Auroral Radar Network (SuperDARN) radar and Wideband Imaging Camera onboard Imager for Magnetopause‐to‐Aurora Global Exploration (IMAGE/WIC) imager to investigate the ionospheric flow pattern associated with auroral streamers for four events. Using the SuperDARN observations allows us to observe the flow associated with the streamers in the context of the larger‐scale background convection. For all four cases studied, streamers developed from preexisting east‐west (EW) arcs that initiated from bead‐like or small‐scale auroral intensifications around the auroral poleward boundary. We find a vortex‐like flow pattern with clockwise sense surrounding both the initial auroral forms and the ensuing streamers. We also found in three cases signatures of flow bifurcations at the equatorward end of the streamers, which suggests a double vortex‐like flow pattern with the counterclockwise vortex east of the clockwise one. Our results are consistent with the double‐vortex flow structure that results from interchange convection associated with a plasma sheet bubble predicted by different numerical simulations. This supports several previous studies and offers more complete observational evidence that the observed flow pattern may be the ionospheric manifestation of interchange instability in the plasma sheet.</jats:p> |
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| author | Shi, Yong, Zesta, Eftyhia, Lyons, Larry R., Yang, J., Boudouridis, A., Ge, Y. S., Ruohoniemi, J. M., Mende, S. |
| author_facet | Shi, Yong, Zesta, Eftyhia, Lyons, Larry R., Yang, J., Boudouridis, A., Ge, Y. S., Ruohoniemi, J. M., Mende, S., Shi, Yong, Zesta, Eftyhia, Lyons, Larry R., Yang, J., Boudouridis, A., Ge, Y. S., Ruohoniemi, J. M., Mende, S. |
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| description | <jats:p>We present direct two‐dimensional flow observations and auroral images from the Super Dual Auroral Radar Network (SuperDARN) radar and Wideband Imaging Camera onboard Imager for Magnetopause‐to‐Aurora Global Exploration (IMAGE/WIC) imager to investigate the ionospheric flow pattern associated with auroral streamers for four events. Using the SuperDARN observations allows us to observe the flow associated with the streamers in the context of the larger‐scale background convection. For all four cases studied, streamers developed from preexisting east‐west (EW) arcs that initiated from bead‐like or small‐scale auroral intensifications around the auroral poleward boundary. We find a vortex‐like flow pattern with clockwise sense surrounding both the initial auroral forms and the ensuing streamers. We also found in three cases signatures of flow bifurcations at the equatorward end of the streamers, which suggests a double vortex‐like flow pattern with the counterclockwise vortex east of the clockwise one. Our results are consistent with the double‐vortex flow structure that results from interchange convection associated with a plasma sheet bubble predicted by different numerical simulations. This supports several previous studies and offers more complete observational evidence that the observed flow pattern may be the ionospheric manifestation of interchange instability in the plasma sheet.</jats:p> |
| doi_str_mv | 10.1029/2011ja017110 |
| facet_avail | Online, Free |
| finc_class_facet | Biologie, Allgemeine Naturwissenschaft, Physik, Technik, Geologie und Paläontologie, Geographie, Chemie und Pharmazie, Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft |
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| imprint_str_mv | American Geophysical Union (AGU), 2012 |
| institution | DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Zi4, DE-Gla1, DE-15, DE-Pl11, DE-Rs1, DE-14, DE-105, DE-Ch1, DE-L229 |
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| language | English |
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| mega_collection | American Geophysical Union (AGU) (CrossRef) |
| 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 | Shi, Yong Zesta, Eftyhia Lyons, Larry R. Yang, J. Boudouridis, A. Ge, Y. S. Ruohoniemi, J. M. Mende, S. 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/10.1029/2011ja017110 <jats:p>We present direct two‐dimensional flow observations and auroral images from the Super Dual Auroral Radar Network (SuperDARN) radar and Wideband Imaging Camera onboard Imager for Magnetopause‐to‐Aurora Global Exploration (IMAGE/WIC) imager to investigate the ionospheric flow pattern associated with auroral streamers for four events. Using the SuperDARN observations allows us to observe the flow associated with the streamers in the context of the larger‐scale background convection. For all four cases studied, streamers developed from preexisting east‐west (EW) arcs that initiated from bead‐like or small‐scale auroral intensifications around the auroral poleward boundary. We find a vortex‐like flow pattern with clockwise sense surrounding both the initial auroral forms and the ensuing streamers. We also found in three cases signatures of flow bifurcations at the equatorward end of the streamers, which suggests a double vortex‐like flow pattern with the counterclockwise vortex east of the clockwise one. Our results are consistent with the double‐vortex flow structure that results from interchange convection associated with a plasma sheet bubble predicted by different numerical simulations. This supports several previous studies and offers more complete observational evidence that the observed flow pattern may be the ionospheric manifestation of interchange instability in the plasma sheet.</jats:p> Two‐dimensional ionospheric flow pattern associated with auroral streamers Journal of Geophysical Research: Space Physics |
| spellingShingle | Shi, Yong, Zesta, Eftyhia, Lyons, Larry R., Yang, J., Boudouridis, A., Ge, Y. S., Ruohoniemi, J. M., Mende, S., Journal of Geophysical Research: Space Physics, Two‐dimensional ionospheric flow pattern associated with auroral streamers, 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 | Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_full | Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_fullStr | Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_full_unstemmed | Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_short | Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_sort | two‐dimensional ionospheric flow pattern associated with auroral streamers |
| title_unstemmed | Two‐dimensional ionospheric flow pattern associated with auroral streamers |
| 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/10.1029/2011ja017110 |