Definition of salt finger in US English:

salt finger


  • One of several alternating columns of rising and descending water produced when a layer of water is overlain by a denser, saltier layer.

    • ‘The evolution of a salt finger from initial instability to a fully developed feature is difficult to follow in a fluid because of the close-packed array of cells that is formed.’
    • ‘Since the discovery of salt fingers by Stern in 1960, there has been much speculation about their role in oceanic mixing.’