Investigation of energy conversion processes and wave activity related to dipolarization fronts observed by MMS
- 1CNRS, Laboratoire de Physique des Plasmas UMR7648, Space plasma, Palaiseau, France (soboh.al-qeeq@lpp.polytechnique.fr)
- 2To national Institute of aerospace, Hampton, USA
- 3Swedish Institute of Space Physics, Uppsala, Sweden
- 4Space Research Institute, Austrian Academy of Sciences, Graz, Austria
- 5University of Texas, Arlington, USA
- 6Laboratory of Atmospheric and Space Physics, USA
- 7Institute of Geophysics and Planetary Physics, Los Angeles, USA
- 8Space Science Center and Department of Physics, University of New Hampshire, Durham, USA
- 9NASA Goddard Space Flight Center, Greenbelt, USA
- 10Southwest Research Institute, San Antonio, USA
- *A full list of authors appears at the end of the abstract
In the present work, we consider four dipolarization front (DF) events detected by MMS spacecraft in the Earth’s magnetotail during a substorm on 23rd of July 2017 between 16:05 and 17:19 UT. From their ion scale properties, we show that these four DF events embedded in fast Earthward plasma flows have classical signatures with increases of Bz, velocity and temperature and a decrease of density across the DF. We compute and compare current densities obtained from magnetic and particle measurements and analyse the Ohm’s law. Then we describe the wave activity related to these DFs. We investigate energy conversion processes via J.E calculations and estimate the importance of the electromagnetic energy flow by computing the divergence of the Poynting vector. Finally we discuss the electromagnetic energy conservation in the context of these DFs.
S. A. Fuselier (10), R. E. Ergun (6), P.A. Lindqvist (11), C.T Russell (7), R. J. Strangeway (7), D. L. Turner (12), I. J. Cohen (12)
How to cite: Alqeeq, S., Le Contel, O., Canu, P., Retino, A., Chust, T., Alexandrova, A., Mirioni, L., Baraka, S., Richard, L., Khotyaintsev, Y., Nakamura, R., Wilder, F., Ahmadi, N., Wei, H., Argall, M., Fischer, D., Gershman, D., Burch, J., Torbert, R., and Giles, B. and the MMS Team: Investigation of energy conversion processes and wave activity related to dipolarization fronts observed by MMS, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-11118, https://doi.org/10.5194/egusphere-egu21-11118, 2021.
