In this section
@article{Qi:2026:10.1029/2026GL123482,
author = {Qi, Y and Ergun, RE and Vo, T and Chasapis, A and Schwartz, SJ and Wilder, V},
doi = {10.1029/2026GL123482},
journal = {Geophysical Research Letters},
title = {The Evolution of Parallel Electric Field Across the Earth's Magnetosheath},
url = {http://dx.doi.org/10.1029/2026GL123482},
volume = {53},
year = {2026}
}
TY - JOUR
AB - In Earth's collisionless magnetosheath, turbulence evolution and energy transformation across the system, especially at kinetic scales, remain poorly quantified without full-coverage of high-resolution observations. Using multi-traversal observations from the 2023 and 2024 Magnetospheric Multiscale (MMS) Unbiased Magnetosheath Campaign, we construct cross-sheath profiles of the electric fields ((Formula presented.)) and find that the parallel electric field ((Formula presented.)) peaks on the bow-shock side and decreases rapidly toward the magnetopause. Enhanced (Formula presented.) defines an extended “turbulence evolution region” occupying ∼20% of the sheath, corresponding to several tens to order of 100 ion gyro-radii ((Formula presented.)). This region is significantly larger than the reflected-ion shock transition region (∼several to order of 10 (Formula presented.)). The (Formula presented.) signals are primarily ion-acoustic-like wave packets, with occasional double layers and phase-space holes. These observations suggest a region where enhanced (Formula presented.) corresponds to intensified sub-kinetic activity and the early stage of magnetosheath turbulence evolution.
AU - Qi,Y
AU - Ergun,RE
AU - Vo,T
AU - Chasapis,A
AU - Schwartz,SJ
AU - Wilder,V
DO - 10.1029/2026GL123482
PY - 2026///
SN - 0094-8276
TI - The Evolution of Parallel Electric Field Across the Earth's Magnetosheath
T2 - Geophysical Research Letters
UR - http://dx.doi.org/10.1029/2026GL123482
VL - 53
ER -