Staircase formation in unstably stratified double diffusive finger convection

Double diffusive staircases are experimentally investigated in a fluid layer with stabilizing temperature gradient and destabilizing of ion concentration. Gradients concentration maintained steady state within an electrochemical system. Staircases observed even if the density stratification is unstable. None previously proposed mechanisms for staircase formation can be recognized experiments. Ion transport through fingers that part not same as extending entire cell. Fingers cease to exist heat between neighboring insufficient.