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- W4322005715 abstract "Turbulent plasmas such as the solar wind and the magnetosheath exhibit an energy cascade which is present across a broad range of scales, from the stirring scale at which energy is injected, down to the smallest scales where energy is dissipated through processes such as reconnection and wave-particle interactions. Recent observations of Earth’s bow shock reveal the presence of a disordered or turbulent transition region which exhibits some features of turbulent dissipation, such as reconnecting current sheets. Understanding the variations in the origin and character of these disordered fluctuations addresses open questions such as how disordered or turbulent fluctuations in the bow shock and magnetosheath are related, and how quickly magnetosheath turbulence arises from bow shock processes. Here, we present two case studies of bow shock crossings observed by Magnetospheric Multiscale (MMS), one quasi-perpendicular and one quasi-parallel. Using high-cadence, combined search-coil and fluxgate magnetometer data, we measure changes in correlation lengths of the magnetic field through three regions: the upstream (solar wind), shock transition region, and downstream (magnetosheath). The influence of the discontinuous shock ramp is reduced using high-pass filters with variable cut-off frequencies. We find that correlation lengths are higher on the solar wind side of the shock, reducing to around 20 ion inertial lengths in the magnetosheath for both the quasi-parallel and the quasi-perpendicular shocks. We also discuss implications of the observed evolution of the correlation length to bow shock and magnetosheath processes." @default.
- W4322005715 created "2023-02-26" @default.
- W4322005715 creator A5030726035 @default.
- W4322005715 creator A5039768227 @default.
- W4322005715 date "2023-05-15" @default.
- W4322005715 modified "2023-09-27" @default.
- W4322005715 title "Measures of correlation length at Earth’s quasi-parallel and quasi-perpendicular bow shock" @default.
- W4322005715 doi "https://doi.org/10.5194/egusphere-egu23-6971" @default.
- W4322005715 hasPublicationYear "2023" @default.
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