Observations of turbulence in a Kelvin-Helmholtz event on September 8, 2015 by the Magnetospheric Multiscale Mission

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Title: Observations of turbulence in a Kelvin-Helmholtz event on September 8, 2015 by the Magnetospheric Multiscale Mission
Authors: Stawarz, JE
Eriksson, S
Wilder, FD
Ergun, RE
Schwartz, SJ
Pouquet, A
Burch, JL
Giles, BL
Khotyaintsev, Y
Le Contel, O
Lindqvist, PA
Magnes, W
Pollock, CJ
Russell, CT
Strangeway, RJ
Torbert, RB
Avanov, LA
Dorelli, JC
Eastwood, JP
Gershman, DJ
Goodrich, KA
Malaspina, DM
Marklund, GT
Mirioni, L
Sturner, AP
Item Type: Journal Article
Publication Date: 2016-11-22
Abstract: Spatial and high-time-resolution properties of the velocities, magnetic eld, and 3D electric eld within plasma turbulence are examined observationally using data from the Magnetospheric Multiscale Mission. Observations from a Kelvin-Helmholtz instability (KHI) on the Earth's magnetopause are examined, which both provides a series of repeatable intervals to analyze, giving better statistics, and provides a rst look at the properties of turbulence in the KHI. For the rst time direct observations of both the high-frequency ion and electron velocity spectra are examined, showing differing ion and electron behavior at kinetic scales. Temporal spectra ex-hibit power law behavior with changes in slope near the ion gyrofrequency and lower-hybrid frequency. The work provides the rst observational evi- dence for turbulent intermittency and anisotropy consistent with quasi-two-dimensional turbulence in association with the KHI. The behavior of kinetic scale intermittency is found to have di erences from previous studies of solar wind turbulence, leading to novel insights on the turbulent dynamics in the KHI.
Issue Date: 22-Nov-2016
Date of Acceptance: 5-Nov-2016
URI: http://hdl.handle.net/10044/1/42487
DOI: https://dx.doi.org/10.1002/2016JA023458
ISSN: 2169-9380
Publisher: American Geophysical Union (AGU)
Start Page: 11021
End Page: 11034
Journal / Book Title: Journal of Geophysical Research: Space Physics
Volume: 121
Issue: 11
Copyright Statement: © 2016. The Authors.This is an open access article under theterms of the Creative CommonsAttribution License, which permits use,distribution and reproduction in anymedium, provided the original work isproperly cited.
Sponsor/Funder: Science and Technology Facilities Council (STFC)
The Leverhulme Trust
Science and Technology Facilities Council (STFC)
Funder's Grant Number: ST/K001051/1
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
Publication Status: Published
Appears in Collections:Space and Atmospheric Physics
Faculty of Natural Sciences

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