tokens: The authors acknowledge helpful discussions with Amitava Bhattacharjee, Kristopher G. Klein, William H. Matthaeus, Michael A. Shay, and Jason M. TenBarge. The research at University of Southern California was supported largely by the National Science Foundation (NSF) grant AGS-1202603 under the NSF/DOE Partnership in Basic Plasma Science and Engineering. S.P.G. and T.N.P. were primarily supported by NSF-SHINE grant AGS-1460130; S.P.G. was also supported in part by NASA LWS grant NNX17AH87G. Computational resources were provided by the NASA High-End Computing (HEC) Program through the NASA Advanced Supercomputing (NAS) Division at Ames Research Center, as well as by the Yellowstone supercomputer sponsored by the NSF at the Computational and Information Systems Laboratory of the National Center for Atmospheric Research. The data used to produce the results described here are archived at the University of Southern California and are available from Dr. Joseph Wang.
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