TY  - JOUR
A1  - Wang, Dedong
A1  - Shprits, Yuri Y.
T1  - On How High-Latitude Chorus Waves Tip the Balance Between Acceleration and Loss of Relativistic Electrons
T2  - Geophysical research letters
N2  - Modeling and observations have shown that energy diffusion by chorus waves is an important source of acceleration of electrons to relativistic energies. By performing long-term simulations using the three-dimensional Versatile Electron Radiation Belt code, in this study, we test how the latitudinal dependence of chorus waves can affect the dynamics of the radiation belt electrons. Results show that the variability of chorus waves at high latitudes is critical for modeling of megaelectron volt (MeV) electrons. We show that, depending on the latitudinal distribution of chorus waves under different geomagnetic conditions, they cannot only produce a net acceleration but also a net loss of MeV electrons. Decrease in high-latitude chorus waves can tip the balance between acceleration and loss toward acceleration, or alternatively, the increase in high-latitude waves can result in a net loss of MeV electrons. Variations in high-latitude chorus may account for some of the variability of MeV electrons.
KW  - radiation belts
KW  - chorus waves
KW  - high latitude
KW  - acceleration
KW  - loss
KW  - modeling
Y1  - 2019
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/48684
SN  - 0094-8276
SN  - 1944-8007
VL  - 46
IS  - 14
SP  - 7945
EP  - 7954
PB  - American Geophysical Union
CY  - Washington
ER  -