The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt
Abstract
Using the electron phase space density (PSD) data measured by Van Allen Probe A from January 2013 to April 2015, we investigate the effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt during 50 geomagnetic storms. A statistical study shows that the maximum electron PSDs for various μ (μ = 630, 1096, 2290, and 3311 MeV/G) at L*~4.0 after the storm peak have good correlations with storm intensity (cc~0.70). This suggests that the occurrence and magnitude of geomagnetic storms are necessary for relativistic electron enhancements at the inner edge of the outer radiation belt (L* = 4.0). For moderate or weak storm events (SYM–H min > ~–100 nT) with weak substorm activity (AE max < 800 nT) and strong storm events (SYM–H min ≤ ~–100 nT) with intense substorms (AE max ≥ 800 nT) during the recovery phase, the maximum electron PSDs for various μ at different L* values (L* = 4.0, 4.5, and 5.0) are well correlated with storm intensity (cc > 0.77). For storm events with intense substorms after the storm peak, relativistic electron enhancements at L* = 4.5 and 5.0 are observed. This shows that intense substorms during the storm recovery phasemore »
- Authors:
-
- Shandong Univ., Weihai (China); Chinese Academy of Sciences (CAS), Beijing (China)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Wuhan Univ., Wuhan (China)
- Univ. of Science and Technology of China, Hefei (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of New Hampshire, Durham, NH (United States)
- Univ. of Colorado, Boulder, CO (United States)
- The Aerospace Corp. California, Los Angeles, CA (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- National Aeronautic and Space Administration (NASA); USDOE
- OSTI Identifier:
- 1440492
- Report Number(s):
- LA-UR-17-31424
Journal ID: ISSN 2169-9380; TRN: US1900754
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Space Physics
- Additional Journal Information:
- Journal Volume: 122; Journal Issue: 10; Journal ID: ISSN 2169-9380
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; Heliospheric and Magnetospheric Physics
Citation Formats
Tang, C. L., Wang, Y. X., Ni, B., Su, Z. P., Reeves, Geoffrey D., Zhang, J. -C., Baker, D. N., Spence, H. E., Funsten, Herbert O., and Blake, J. B. The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt. United States: N. p., 2017.
Web. doi:10.1002/2017JA024407.
Tang, C. L., Wang, Y. X., Ni, B., Su, Z. P., Reeves, Geoffrey D., Zhang, J. -C., Baker, D. N., Spence, H. E., Funsten, Herbert O., & Blake, J. B. The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt. United States. https://doi.org/10.1002/2017JA024407
Tang, C. L., Wang, Y. X., Ni, B., Su, Z. P., Reeves, Geoffrey D., Zhang, J. -C., Baker, D. N., Spence, H. E., Funsten, Herbert O., and Blake, J. B. Fri .
"The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt". United States. https://doi.org/10.1002/2017JA024407. https://www.osti.gov/servlets/purl/1440492.
@article{osti_1440492,
title = {The effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt},
author = {Tang, C. L. and Wang, Y. X. and Ni, B. and Su, Z. P. and Reeves, Geoffrey D. and Zhang, J. -C. and Baker, D. N. and Spence, H. E. and Funsten, Herbert O. and Blake, J. B.},
abstractNote = {Using the electron phase space density (PSD) data measured by Van Allen Probe A from January 2013 to April 2015, we investigate the effects of magnetospheric processes on relativistic electron dynamics in the Earth's outer radiation belt during 50 geomagnetic storms. A statistical study shows that the maximum electron PSDs for various μ (μ = 630, 1096, 2290, and 3311 MeV/G) at L*~4.0 after the storm peak have good correlations with storm intensity (cc~0.70). This suggests that the occurrence and magnitude of geomagnetic storms are necessary for relativistic electron enhancements at the inner edge of the outer radiation belt (L* = 4.0). For moderate or weak storm events (SYM–Hmin > ~–100 nT) with weak substorm activity (AEmax < 800 nT) and strong storm events (SYM–Hmin ≤ ~–100 nT) with intense substorms (AEmax ≥ 800 nT) during the recovery phase, the maximum electron PSDs for various μ at different L* values (L* = 4.0, 4.5, and 5.0) are well correlated with storm intensity (cc > 0.77). For storm events with intense substorms after the storm peak, relativistic electron enhancements at L* = 4.5 and 5.0 are observed. This shows that intense substorms during the storm recovery phase are crucial to relativistic electron enhancements in the heart of the outer radiation belt. In conclusion, our statistics study suggests that magnetospheric processes during geomagnetic storms have a significant effect on relativistic electron dynamics.},
doi = {10.1002/2017JA024407},
url = {https://www.osti.gov/biblio/1440492},
journal = {Journal of Geophysical Research. Space Physics},
issn = {2169-9380},
number = 10,
volume = 122,
place = {United States},
year = {2017},
month = {8}
}
Web of Science
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Works referencing / citing this record:
Statistics of Extreme Time‐Integrated Geomagnetic Activity
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