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:
“People always ask us, “Are things better or worse today?” Well, some things are better and some things are worse.... But there are a lot of problems in the world today that no one dreamed of when we were young. For instance, this business about the environment. Why, clean water was just something you took for granted.”
—Sarah Delany (b. 1890)
“Once it was a boat, quite wooden
and with no business, no salt water under it
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She’s been elected.”
—Anne Sexton (1928–1974)
“All that could run or leap or swim
Whether in wood, water or cloud,
Acclaiming, proclaiming, declaiming Him.”
—William Butler Yeats (1865–1939)