Murphy, KR;
Watt, CEJ;
Mann, IR;
Jonathan Rae, I;
Sibeck, DG;
Boyd, AJ;
Forsyth, CF;
... Fennell, J; + view all
(2018)
The Global Statistical Response of the Outer Radiation Belt During Geomagnetic Storms.
Geophysical Research Letters
, 45
(9)
pp. 3783-3792.
10.1002/2017GL076674.
Preview |
Text (Published article)
Murphy_et_al-2018-Geophysical_Research_Letters.pdf - Published Version Download (1MB) | Preview |
Preview |
Text (Supporting information)
Murphy_Global Statistical Response_Suppl.pdf Download (427kB) | Preview |
Abstract
Using the total radiation belt electron content calculated from Van Allen Probe phase space density, the time-dependent and global response of the outer radiation belt during storms is statistically studied. Using phase space density reduces the impacts of adiabatic changes in the main phase, allowing a separation of adiabatic and nonadiabatic effects and revealing a clear modality and repeatable sequence of events in storm time radiation belt electron dynamics. This sequence exhibits an important first adiabatic invariant (μ)-dependent behavior in the seed (150 MeV/G), relativistic (1,000 MeV/G), and ultrarelativistic (4,000 MeV/G) populations. The outer radiation belt statistically shows an initial phase dominated by loss followed by a second phase of rapid acceleration, while the seed population shows little loss and immediate enhancement. The time sequence of the transition to the acceleration is also strongly μ dependent and occurs at low μ first, appearing to be repeatable from storm to storm.
| Type: | Article |
|---|---|
| Title: | The Global Statistical Response of the Outer Radiation Belt During Geomagnetic Storms |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/2017GL076674 |
| Publisher version: | https://doi.org/10.1002/2017GL076674 |
| Language: | English |
| Additional information: | Copyright © 2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10050408 |
Archive Staff Only
 |
View Item |
