Since the ice age (flood) global warming and other factors are causing oceans to become more salty. From a naturalistic perspective seeing the earth as 4.3 Billion years old this simply wouldn’t be the case. The salinity should have been uniform millions and millions of years ago? Why are salinity levels still increasing? This is a challenge to evolutionary time lines.
“We’re seeing big changes in ocean salinities that can only be explained by an increase in the water cycle,” Schmitt said. “We see this changing salinity, and we want to relate it to the changing water cycle — but we have to understand what the ocean is doing.“NASA, California Institute of Technology