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:
“The dominant and most deep-dyed trait of the journalist is his timorousness. Where the novelist fearlessly plunges into the water of self-exposure, the journalist stands trembling on the shore in his beach robe.... The journalist confines himself to the clean, gentlemanly work of exposing the griefs and shames of others.”
—Janet Malcolm (b. 1934)
“But the beggar gazes on calamity
And thereafter he belongs to it, to bread
Hard found, and water tasting of misery.”
—Wallace Stevens (1879–1955)
“The point of the dragonfly’s terrible lip, the giant water bug, birdsong, or the beautiful dazzle and flash of sunlighted minnows, is not that it all fits together like clockwork--for it doesn’t ... but that it all flows so freely wild, like the creek, that it all surges in such a free, finged tangle. Freedom is the world’s water and weather, the world’s nourishment freely given, its soil and sap: and the creator loves pizzazz.”
—Annie Dillard (b. 1945)