Henk A. Dijkstra is professor of dynamical oceanography at the Institute for Marine and Atmospheric research Utrecht (IMAU) at the Department of Physics and Astronomy of Utrecht University, the Netherlands. After graduating in applied mathematics at the University of Groningen in 1984. During his Ph.D. he worked in Groningen on a Spacelab experiment involving Marangoni convection under microgravity conditions. From 1988-1990 he continued this research at the Department of Chemical Engineering at Cornell University (USA) . In 1990 he started to work on problems in physical oceanography at Utrecht University. His main research interests are in the stability of ocean currents and the physics of low-frequency variability of the climate system. He is the author of the book "Nonlinear Physical Oceanography" of which the 2nd edition appeared in 2005 (Springer).