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Ann. Geophys., 25, 13-17, 2007
www.ann-geophys.net/25/13/2007/
© European Geosciences Union 2007
Spatial structure of plasma flow associated turbulence in the Earth's plasma sheet
Z. Vörös1,2, W. Baumjohann1, R. Nakamura1, A. Runov1, M. Volwerk1,3, T. Takada1, E. A. Lucek4, and H. Rème5
1Space Research Institute, Austrian Academy of Sciences, Graz, Austria
2Institute of Atmospheric Physics, Prague, Czech Republic
3Max-Plank-Institut für extraterrestrische Physik, Garching, Germany
4Imperial College, London, UK
5CESR/CNSR, Toulouse, France
Abstract. Using Cluster multipoint magnetic and plasma measurements we analyze
the spatial structure of plasma flow-associated turbulence on 26
September 2005. The fortunate relative configuration of the
spacecraft and the plasma flow allowed for the first time to compare
the scale evolution of statistical moments both at the boundary and
in the central part of the flow at the same time. The simultaneous
increase of skewness and kurtosis at the boundary of the plasma flow
over the time scale of seconds provides evidence for the existence
of nonlocal coupling in flow-associated turbulence in the Earth's
plasma sheet.
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