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Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis
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| Zeitschriftentitel: | Geophysical Research Letters |
|---|---|
| Personen und Körperschaften: | , , , , , , , |
| In: | Geophysical Research Letters, 42, 2015, 17, S. 6906-6915 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
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| Schlagwörter: |
| author_facet |
Li, W. Thorne, R. M. Bortnik, J. Baker, D. N. Reeves, G. D. Kanekal, S. G. Spence, H. E. Green, J. C. Li, W. Thorne, R. M. Bortnik, J. Baker, D. N. Reeves, G. D. Kanekal, S. G. Spence, H. E. Green, J. C. |
|---|---|
| author |
Li, W. Thorne, R. M. Bortnik, J. Baker, D. N. Reeves, G. D. Kanekal, S. G. Spence, H. E. Green, J. C. |
| spellingShingle |
Li, W. Thorne, R. M. Bortnik, J. Baker, D. N. Reeves, G. D. Kanekal, S. G. Spence, H. E. Green, J. C. Geophysical Research Letters Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis General Earth and Planetary Sciences Geophysics |
| author_sort |
li, w. |
| spelling |
Li, W. Thorne, R. M. Bortnik, J. Baker, D. N. Reeves, G. D. Kanekal, S. G. Spence, H. E. Green, J. C. 0094-8276 1944-8007 American Geophysical Union (AGU) General Earth and Planetary Sciences Geophysics http://dx.doi.org/10.1002/2015gl065342 <jats:title>Abstract</jats:title><jats:p>Determining preferential solar wind conditions leading to efficient radiation belt electron acceleration is crucial for predicting radiation belt electron dynamics. Using Van Allen Probes electron observations (>1 MeV) from 2012 to 2015, we identify a number of efficient and inefficient acceleration events separately to perform a superposed epoch analysis of the corresponding solar wind parameters and geomagnetic indices. By directly comparing efficient and inefficient acceleration events, we clearly show that prolonged southward <jats:italic>B</jats:italic><jats:sub>z</jats:sub>, high solar wind speed, and low dynamic pressure are critical for electron acceleration to >1 MeV energies in the heart of the outer radiation belt. We also evaluate chorus wave evolution using the superposed epoch analysis for the identified efficient and inefficient acceleration events and find that chorus wave intensity is much stronger and lasts longer during efficient electron acceleration events, supporting the scenario that chorus waves play a key role in MeV electron acceleration.</jats:p> Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis Geophysical Research Letters |
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10.1002/2015gl065342 |
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American Geophysical Union (AGU), 2015 |
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| title |
Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_unstemmed |
Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_full |
Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_fullStr |
Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_full_unstemmed |
Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_short |
Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_sort |
solar wind conditions leading to efficient radiation belt electron acceleration: a superposed epoch analysis |
| topic |
General Earth and Planetary Sciences Geophysics |
| url |
http://dx.doi.org/10.1002/2015gl065342 |
| publishDate |
2015 |
| physical |
6906-6915 |
| description |
<jats:title>Abstract</jats:title><jats:p>Determining preferential solar wind conditions leading to efficient radiation belt electron acceleration is crucial for predicting radiation belt electron dynamics. Using Van Allen Probes electron observations (>1 MeV) from 2012 to 2015, we identify a number of efficient and inefficient acceleration events separately to perform a superposed epoch analysis of the corresponding solar wind parameters and geomagnetic indices. By directly comparing efficient and inefficient acceleration events, we clearly show that prolonged southward <jats:italic>B</jats:italic><jats:sub>z</jats:sub>, high solar wind speed, and low dynamic pressure are critical for electron acceleration to >1 MeV energies in the heart of the outer radiation belt. We also evaluate chorus wave evolution using the superposed epoch analysis for the identified efficient and inefficient acceleration events and find that chorus wave intensity is much stronger and lasts longer during efficient electron acceleration events, supporting the scenario that chorus waves play a key role in MeV electron acceleration.</jats:p> |
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| author | Li, W., Thorne, R. M., Bortnik, J., Baker, D. N., Reeves, G. D., Kanekal, S. G., Spence, H. E., Green, J. C. |
| author_facet | Li, W., Thorne, R. M., Bortnik, J., Baker, D. N., Reeves, G. D., Kanekal, S. G., Spence, H. E., Green, J. C., Li, W., Thorne, R. M., Bortnik, J., Baker, D. N., Reeves, G. D., Kanekal, S. G., Spence, H. E., Green, J. C. |
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| description | <jats:title>Abstract</jats:title><jats:p>Determining preferential solar wind conditions leading to efficient radiation belt electron acceleration is crucial for predicting radiation belt electron dynamics. Using Van Allen Probes electron observations (>1 MeV) from 2012 to 2015, we identify a number of efficient and inefficient acceleration events separately to perform a superposed epoch analysis of the corresponding solar wind parameters and geomagnetic indices. By directly comparing efficient and inefficient acceleration events, we clearly show that prolonged southward <jats:italic>B</jats:italic><jats:sub>z</jats:sub>, high solar wind speed, and low dynamic pressure are critical for electron acceleration to >1 MeV energies in the heart of the outer radiation belt. We also evaluate chorus wave evolution using the superposed epoch analysis for the identified efficient and inefficient acceleration events and find that chorus wave intensity is much stronger and lasts longer during efficient electron acceleration events, supporting the scenario that chorus waves play a key role in MeV electron acceleration.</jats:p> |
| doi_str_mv | 10.1002/2015gl065342 |
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| imprint | American Geophysical Union (AGU), 2015 |
| imprint_str_mv | American Geophysical Union (AGU), 2015 |
| 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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| physical | 6906-6915 |
| publishDate | 2015 |
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| publisher | American Geophysical Union (AGU) |
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| series | Geophysical Research Letters |
| source_id | 49 |
| spelling | Li, W. Thorne, R. M. Bortnik, J. Baker, D. N. Reeves, G. D. Kanekal, S. G. Spence, H. E. Green, J. C. 0094-8276 1944-8007 American Geophysical Union (AGU) General Earth and Planetary Sciences Geophysics http://dx.doi.org/10.1002/2015gl065342 <jats:title>Abstract</jats:title><jats:p>Determining preferential solar wind conditions leading to efficient radiation belt electron acceleration is crucial for predicting radiation belt electron dynamics. Using Van Allen Probes electron observations (>1 MeV) from 2012 to 2015, we identify a number of efficient and inefficient acceleration events separately to perform a superposed epoch analysis of the corresponding solar wind parameters and geomagnetic indices. By directly comparing efficient and inefficient acceleration events, we clearly show that prolonged southward <jats:italic>B</jats:italic><jats:sub>z</jats:sub>, high solar wind speed, and low dynamic pressure are critical for electron acceleration to >1 MeV energies in the heart of the outer radiation belt. We also evaluate chorus wave evolution using the superposed epoch analysis for the identified efficient and inefficient acceleration events and find that chorus wave intensity is much stronger and lasts longer during efficient electron acceleration events, supporting the scenario that chorus waves play a key role in MeV electron acceleration.</jats:p> Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis Geophysical Research Letters |
| spellingShingle | Li, W., Thorne, R. M., Bortnik, J., Baker, D. N., Reeves, G. D., Kanekal, S. G., Spence, H. E., Green, J. C., Geophysical Research Letters, Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis, General Earth and Planetary Sciences, Geophysics |
| title | Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_full | Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_fullStr | Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_full_unstemmed | Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_short | Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| title_sort | solar wind conditions leading to efficient radiation belt electron acceleration: a superposed epoch analysis |
| title_unstemmed | Solar wind conditions leading to efficient radiation belt electron acceleration: A superposed epoch analysis |
| topic | General Earth and Planetary Sciences, Geophysics |
| url | http://dx.doi.org/10.1002/2015gl065342 |