The ocean has direct sunlight and heat forward toward it all day. This causes for the sun to evaporate the water in the ocean. So while the water is evaporating the salt in the ocean does not. Thus, less water means more salt is present.
Temperature and salinity are related to pressure and density through the seawater equation of state. This is an empirically derived formula, as no theoretically-derived closed form solution is known.
A linear approximation for small variations around the mean density (rho_0) can be written (from Vallis, p.16):
rho = rho_0 [1 - beta_T (T - T_0) + beta_S (S - S_0) + beta_p (p - p_0)]
where,
beta_T ~ 2 (+/- 1.5) x 10^{-4} K^{-1}
beta_S ~ 7.6 (+/- 0.2) x 10^{-4} ppt^{-1}
beta_p ~ 4.1 (+/- 0.5) x 10^{-10} Pa^{-1}
The temperature control how hot or cold the ocean is. The salinity control how much salt is in the ocean.
Well, the movement off the water moves the salt or the salinity.
evaporation and rain.
the higher the salinity the more easily an object can float
The temperature and salinity of seawater determine its density. Water gets denser as it gets saltier and reaches a maximum density at 4 °C. Salinity does affect the boiling point and freezing point of water, but not its temperature.
Wind, temperature, salinity, tides and the breaking of waves are some of the factors that affect the movement of ocean water.
the temperature and the salinity
The temperature and the salinity affect water's density.
Temperature & salinity.
The temperature and salinity of seawater determine its density. Water gets denser as it gets saltier and reaches a maximum density at 4 °C. Salinity does affect the boiling point and freezing point of water, but not its temperature.
I Don't know, did not research.
Salinity is affected by temperature of the water, amount of salt per area, how cool it is, and the amount of water per area. If it's hot, the water will evaporate leaving more salt behind. The more salt you add, of course you will have a higher salinity. If it is cold, ice forms and pushes out the salt into the water below. And if you add more water, there will be more water to hold the salt, thus lowering the salinity.
Continental Erosion
The effect of temperature is that the warm water is denser than colder water, since the molecules are spread out so the warm water sinks to the bottom. The affect of salinity is that since the water is salanatized it sinks to the bottom while the fresh water floats (due to the amount of salinity).
I can confirm that hermit crabs favor salinity on the lower end of the reef tank spectrum vs. higher. I have been trying to ease my salinity down from 35 ppt to 30 ppt. The closer I get, the more active the crabs have become. I have about a dozen and they have ALL started to become more active. Take it FWIW.