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About 3.5% of the weight of seawater comes from dissolved salts. But just how did the salt get in there? Why is the ocean salty? Lets dive in.
Doug Peltz, popularly known as Mystery Doug, is an American science communicator and entrepreneur based in San Francisco. He is best known as the co-founder of the popular science curriculum Mystery Science, a science program used in 50% of U.S. elementary schools and recently acquired by Discovery Education . [ 2 ]
Brine rejection is a process that occurs when salty water freezes. The salts do not fit in the crystal structure of water ice, so the salt is expelled. Since the oceans are salty, this process is important in nature. Salt rejected by the forming sea ice drains into the surrounding seawater, creating saltier, denser brine.
The oxygen content in bottom water is high due to ocean circulation. In the Antarctic, salty and cold surface water sinks to lower depths due to its high density. As the surface water sinks, it carries oxygen from the surface with it and will spend an enormous amount of time circulating across the seafloor of ocean basins.
Seawater temperatures have hit 100 degrees with all this heat. The consequences can be enormous to marine ecosystems, including the St. Johns River.
The oceans are not just a marine habitat. They are also a workplace, a highway, a prison, a grocery store, a trash can, a cemetery — and much more. Why we need to think about the oceans differently
The modern thermohaline circulation is thus more controlled by density contrasts due to thermal differences, whereas during the LGM the oceans were more than twice as sensitive to differences in salinity rather than temperature. In this way, the thermohaline circulation can be considered to have been less "thermo" and more "haline".
Could secrets of the galaxy be found at the bottom of the ocean? Researchers at Australian National University seem to think so. They are studying these teeny-tiny particles of sediment that they ...