A solar pond is simply a pool of saltwater which collects and stores solar thermal energy. <br> The saltwater naturally forms a vertical salinity gradient also known as a halocline, in which low-salinity water floats on top of high-salinity water. The layers of salt solutions increase in concentration with depth. Below a certain depth, the solution has a uniformly high salt concentration. | A solar pond is simply a pool of saltwater which collects and stores solar thermal energy. <br> The saltwater naturally forms a vertical salinity gradient also known as a halocline, in which low-salinity water floats on top of high-salinity water. The layers of salt solutions increase in concentration with depth. Below a certain depth, the solution has a uniformly high salt concentration. |