A deep industrial solar salt pond is designed to trap thermal energy. The density of the saline water in the pond changes with depth below the surface due to a salinity gradient.
The graph and the table below show how the density of the fluid changes with depth.
| Depth (mmm) | Fluid Density (kg/m3kg/m^3kg/m3) |
|---|---|
| 0 | 1000 |
| 1 | 1080 |
| 2 | 1140 |
| 3 | 1185 |
| 4 | 1215 |
| 5 | 1235 |
| 6 | 1248 |
| 7 | 1255 |
Using the data, describe how the fluid density of the solar pond changes with depth below the surface.