July 27, 2015 to August 21, 2015
Nordita, Stockholm
Europe/Stockholm timezone

Reconnection in Vlasiator: 2. Influence of the magnetosheath waves

Aug 14, 2015, 12:00 PM
FD5 (Nordita, Stockholm)


Nordita, Stockholm

Oral Workshop, August 10-14 Pre-noon V


Sanni Hoilijoki (Finnish Meteorological Institute)


The global hybrid-Vlasov simulation Vlasiator (http://vlasiator.fmi.fi), developed at the Finnish Meteorological Institute, describes ions as velocity distributions functions propagated by solving the Vlasov equation and treats electrons as charge-neutralizing fluid. We present results from a new 5- dimensional simulation describing the Earth's magnetosphere in two dimensions in the polar plane and three dimensions in the velocity space under purely southward IMF. The simulation box extends 40 Earth radii (RE) in the solar wind direction up to a hundred RE in the nightside, thus covering both the dayside and the nightside reconnection sites. As a result from the reconnection at the dayside magnetopause we observe the formation of two-dimensional equivalents of flux transfer events. The formation of the flux transfer events varies spatially and temporally producing events with different velocities. Earlier, the mirror modes in the magnetosheath have been found to affect temporal variations of the velocity of reconnection jets (Laitinen et al. 2010). Waves with the characteristics of mirror modes emerge in the magnetosheath and advect toward the magnetopause in the simulation. We investigate their role on temporal and spatial variations of the dayside reconnection under steady IMF condition.

Primary author

Sanni Hoilijoki (Finnish Meteorological Institute)


Arto Sandroos (Finnish Meteorological Institute) Heli Hietala (Imperial College London) Minna Palmroth (Finnish Meteorological Institute) Otto Hannuksela (Finnish Meteorological Institute) Rami Vainio (University of Turku) Sebastian von Alfthan (Finnish Meteorological Institute) Tiera Laitinen (Finnish Meteorological Institute) Urs Ganse (University of Helsinki) Yann Pfau-Kempf (Finnish Meteorological Institute)

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