SM22A-04
Fast Flows and Entropy Evolution in Global Hybrid Simulation
Tuesday, 15 December 2015: 10:56
2018 (Moscone West)
Yu Lin1, Xueyi Wang1, Simon Wing2, Jay Johnson3 and Joseph D Perez1, (1)Auburn University, Auburn, AL, United States, (2)Johns Hopkins University, Baltimore, MD, United States, (3)Princeton University, Plasma Physics Laboratiry, Princeton, NJ, United States
Abstract:
We use a 3-D global hybrid simulation to investigate the earthward plasma transport associated with magnetotail fast flows. The simulation is performed for the self-consistent interaction between the solar wind and the magnetosphere. Cases with (1) a steady southward IMF and (2) a steady northward IMF that turns southward are presented. Near-tail reconnection is found to lead to 3-D, localized flux ropes and fast flows, in which multiple ion beams are present. The structure of fast flow and the flow braking at the dipolarization are investigated. To understand the ion transport in the dynamic global process, the entropy distribution in the magnetotail is calculated. By projecting the integrated entropy along the closed flux tubes to the ionosphere, the plasma transport to the inner magnetosphere and its relation to depleting entropy on flux tubes are discussed.
