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:
“Rock of ages, cleft for me,
Let me hide myself in Thee!
Let the Water and the Blood,
From thy riven Side which flow’d,
Be of sin the double cure;
Cleanse me from its guilt and pow’r.”
—Augustus Montague Toplady (1740–1778)
“If you keep your feathers well oiled the water of criticism will run off as from a duck’s back.”
—Ellen Henrietta Swallow Richards (1842–1911)
“You cannot go into the same water twice.”
—Plato (c. 427–347 B.C.)