Speaker
Description
Magnetosheath jets, transient plasma structures of enhanced dynamic pressure, can excite ultra-low frequency (ULF) waves in the magnetosphere impacting the magnetopause. These ULF waves transport energy into the ionosphere, making it essential to quantify their contribution to ionospheric energy deposition. In this study, we combine observations from the Magnetospheric Multiscale (MMS) mission, ground-based magnetometers, the EISCAT radar in Svalbard, and SuperDARN to estimate the ionospheric energy input associated with jet-driven ULF waves. Our results indicate an average Joule heating rate of 0.38 mW/m², comparable to that of field line resonances. However, due to the localized and transient nature of jets, the total energy input was limited to approximately 9.1×10^10 J. These findings suggest that while magnetosheath jet impacts can locally enhance ionospheric energy input, their overall contribution to the magnetospheric energy budget is modest.
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