Intrinsic low-frequency variability of the Gulf Stream G. Quattrocchi, S. Pierini, and H. A. Dijkstra 155-164 Turbulence in a global magnetohydrodynamic simulation of the Earth's magnetosphere during northward and southward interplanetary magnetic field M. El-Alaoui, R. L. Richard, M. Ashour-Abdalla, R. J. Walker, and M. L. Goldstein 165-175