Water
A steep density gradient in a body of water can have the effect of trapping energy and preventing convection, such a gradient is employed in solar ponds. In the case of salt water, sharp gradients can lead to stratification of different concentrations of salinity. This is called a Halocline.
Read more about this topic: Density Gradient
Famous quotes containing the word water:
“It may be that through habit these do best,
Coming to water clumsily undressed
Yearly; teaching their children by a sort
Of clowning; helping the old, too, as they ought.”
—Philip Larkin (1922–1986)
“If there’s water in the big rivers, the small rivers will be full.”
—Chinese proverb.
“It is with artworks as it is with wine: it is much better when we do not need either one, when we stick with water, and when out of our own inner fire, the inner sweetness of our own soul, we turn the water over and over again into wine ourselves.”
—Friedrich Nietzsche (1844–1900)