Hibiscus,
In this part that you copied, there is nothing of any proof that the earth is young. It just explains what salinity is. I know what it is.
your explanation:
.The salinity of the sea water:
Sea water is about a 3.49% solution of salt , or about 96.5% freshwater. The more saline, the denser the sea water .
As the range of salt concentration varies from about 3.2 to 3.8%, oceanographers, who refer to salt content as ' salinity ', express salt concentration as parts per thousand, making 34.9 parts-per-thousand (ppt) the average salinity.
Salinity changes the properties of water from that of pure water. As sea water evaporates the salt remains behind , only the freshwater is transferred from the ocean to the atmosphere, hence regions of excess evaporation , such as the subtropics tend to become salty, while the areas of excess rainfall become fresher .
The tropical belt, or Inter Tropical Convergence Zone is such an area. The ocean circulation acts to move lower salinity sea water into evaporative regions, and more saline water into humid regions , this is part of the hydrological cycle . The relative freshness of the Pacific Ocean surface water stands out.
Excess evaporation of the Atlantic and excess precipitation of the Pacific are balanced to some measure by an atmospheric flux of water vapor over Central America, amounting to 0.35 Sv. The Arctic Sea is very fresh, due to the enormous amount of river water that drains into it from the northern continents. The effects of ocean circulation are seen in the transfer of saline surface water into the northern North Atlantic . Cooling of this water leads to sinking and the formation of North Atlantic Deep Water .
In the polar regions sea water freezes . The resulting ice contains only part of the sea water salt, about 0.5% (5 ppt), hence ice formation like evaporation, concentrates salt in the remaining body of sea water. This causes very dense water (cold and salty), which in some regions in the Southern Ocean leads to deep reaching convection (that is spontaneous sinking of heavy water), called Antarctic Bottom water .
The very low salinity of the Arctic prohibits the development of deep reaching convection. Southern ocean ice exhibits lots of seasonal variability, and is generally only 0.5 meters thick. There is evidence of greater amount of vertical overturning (sinking of heavy, dense water and rising of lighter water) in the southern Ocean, as deep water upwells to be replaced by sinking cold polar water.
In sharp contrast is the Arctic sea where the sea ice is usually about 2 to 3 meters thick with a lesser amount of seasonality, and a water column which is very stratified (low density residing above high density).
There is some evidence that global warming is reducing the area of year round sea ice in Arctic, but not (yet?) within the Southern Ocean
so, what do you want to say: that the earth is young. It does not show. Salts comes into the ocean, that can be measured. A portion of that salt is used by organisms in the sea (some salts). Another part becomes sediment. Maybe the sea is getting more salty, but if you want to prove your point, the above quote is not a prove for a young earth at all. It is just the opposite.
If you want to prove it, do your math, and show me the figures, and I will believe you.
Danny