An inhospitable cauldron of
dense salty water and methane proves lethal for most, but the organisms that survive could resemble life on other planets.
Evaporative loss leaves the ocean saltier; the Mediterranean and Persian Gulf for example have strong evaporative loss; the resulting plume of
dense salty water may be traced through the Straits of Gibraltar into the Atlantic Ocean.
Not exact matches
Summer ice, as it forms, rejects salt, leading to the creation of
dense,
salty waters just below the ice.
Icebergs are made of fresh
water, which is less
dense than
salty seawater.
The
saltier water is
denser and so does not mix with the less
salty water above it.
In this pattern, warm
waters flow northward from the tropics, then cool and become
saltier and
denser as they reach higher latitudes.
This would shut down a global ocean circulation system that is driven by
dense,
salty water falling to the bottom of the north Atlantic and that ultimately produces the Gulf Stream.
Then they filled the platform with
water of varying salinity to replicate the different densities found at the strait, with
denser,
saltier water below and lighter, less briny
water above.
As the warm
water reaches high North Atlantic latitudes, it gives up heat and moisture to the atmosphere, leaving cold,
salty,
dense water that sinks to the ocean floor.
This global circulation is propelled by the sinking of cold,
salty — and therefore
dense — ocean
waters.
As a result, while a layer of ice - cold fresh
water sits just beneath the sea ice, about 20 meters (65 feet) down there is a layer of
denser,
saltier water that has been gradually warmed by the sun's rays.
This warmed
salty dense water is some of the
water that sinks to replace the cold
water that came up near South America.
The main issue is that sea ice is fresher than sea
water (has less salt), and since
salty water is more
dense (1028 kg / m3) than fresher
water (1004 kg / m3 for 5 psu), the volume of sea
water displaced by the ice is slightly less than the volume of the ice if it melted.
(
Water is more dense when it is salty — fresh water will float above salt water, so if the North Atlantic is freshened, the formation of NADW could be suppres
Water is more
dense when it is
salty — fresh
water will float above salt water, so if the North Atlantic is freshened, the formation of NADW could be suppres
water will float above salt
water, so if the North Atlantic is freshened, the formation of NADW could be suppres
water, so if the North Atlantic is freshened, the formation of NADW could be suppressed.)
By the time it reaches the far North Atlantic, the
dense,
salty water has cooled and sinks.
When this
salty surface ocean
water is cooled sufficiently, it becomes too
dense to float above the
waters it overlies, so it sinks «like a rock».
Water with a higher salinity is more dense than less salty w
Water with a higher salinity is more
dense than less
salty waterwater.
The warm intruding Atlantic
water is
saltier and
denser and flows between 100 and 900 meters below the surface.
Salty water is also more
dense than pure
water.
If enough fresh
water from melting glaciers flows into the North Atlantic, this would make the seawater less
salty and less
dense, so that it couldn't sink anymore.
In shallow seas that dominated subtropical regions, warm
salty water became
dense enough to sink to the bottom.
But your link shows that warm
saltier water can be
denser than colder fresher
water, I should have remembered that as it is one of the factors that drives the thermo - haline circulation.
It is fed by the freshwater input of the big Siberian and Canadian streams (Ob, Yenisei, Lena, Mackenzie), the
water of which quasi floats on the
saltier,
denser, deeper ocean
water.
A greater - than - normal volume of warm
salty tropical
water was transported north with the current and this was drawn down into the ocean in the region around 60 ° N - where
dense water sinking occurs.
But up to now, it has been a mystery why much of the resulting fresh
water ends up in the depths instead of floating above
saltier,
denser ocean
waters.
Intruding
dense salty warm
water also generates a reservoir of Arctic heat stored between 100 and 900 meters depth.
In this case, the study suggests that the massive amounts of fresh
water melting into the ocean from Greenland can prevent the sinking of the
dense, cold,
salty water and alter the AMOC circulation.
But he said that other impacts of climate change could upset the cycle, which is caused by variation in the salinity of the
water as
denser,
saltier water sinks.
So, the
saltier and more
dense Atlantic
water sinks below the surface and a colder fresher layer of
water above it acts as a insolation blanket that limits the amount of ocean heat in contact with the ice above.
Because surface
water that evaporates leaves nearly all of its salt behind, the surface becomes
saltier — and if it becomes more
dense than the underlying
water, it sinks, sometimes in great blobs that do not mix very well with underlying
waters, just like Dan's cream.
A shallower return current aided by winds then brings warmer and less
salty — and thus less
dense —
water to the Atlantic.
The cycle starts when
saltier,
denser water at the surface northern part of the Atlantic, near Iceland, causes the
water to sink.
This would make the surface ocean less
salty, which (along with the warming) makes the surface
waters less
dense, and less likely to sink, meaning that the AMOC would weaken or maybe collapse completely.
Saltier water is
denser, sinks faster, and takes surface heat with it.
This sea ice formation creates cold,
dense,
salty water that sinks to the seafloor and forms very
dense Antarctic bottom
water.
Because
saltier water is
denser and thus more likely to sink, the transport of salt poleward into the North Atlantic provides a potentially destabilizing advective feedback to the AMOC (Stommel, 1961); i.e., a reduction in the strength of the AMOC would lead to less salt being transported into the North Atlantic, and hence a further reduction in the AMOC would ensue.
An input of freshwater makes the ocean less
salty and less
dense, reducing the amount of deep
water produced and slowing down the ocean circulation.
How do the
water column profile and
dense salty shelf
water (HSSW) characteristics evolve on time scales ranging from sub-synoptic to the annual cycle?
They found that the
dense,
salty water from the Marmara Sea — which leads out to the Aegean and Mediterranean Seas at the other end of the Bosphorus — is flowing out of the strait and along the bottom of the Black Sea, carrying along sediment and nutrients that could be key in providing vital nutrients to remote parts of the ocean.
As the warm
water reaches high North Atlantic latitudes, it gives up heat and moisture to the atmosphere, leaving cold,
salty,
dense water that sinks to the ocean floor.
This layering results from a strong density gradient:
water layers near the surface are less
salty and therefore less
dense, while bottom
waters are the
densest.