Questions tagged [salinity]

Questions referring to the amount of salt in a body of water such as oceans.

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Are there any saltwater rivers on Earth?

I'm curious if there are any saltwater rivers on Earth. These would presumably arise if a saltwater lake had a river outlet to the ocean. However, all the saltwater lakes I looked at (Caspian Sea, ...
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22 votes
1 answer
603 views

How is ocean salinity measured from space?

Since 2009, two satellites (SMOS from ESA and Aquarius from NASA) are providing global salinity measurements. While ocean temperature is easily derived from infrared radiation for instance, what ...
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15 votes
1 answer
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Why is the sea salinity high in the Mediterannean and Red Sea and low in Indonesia and Malaysia?

It goes without question that salinity levels will be lower where rivers enter as the river water mixing with the sea water will reduce the salinity levels. But, the thing is, when you look at the map ...
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13 votes
1 answer
971 views

Is it possible to forecast ocean salinity 100 years into the future?

Paleosalinity is measured by chloricity of pore fluids (Adkins 2002). Current data are provided by the CORA dataset. In addition to answers to the main question, there are a few more points I'd like ...
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12 votes
1 answer
778 views

What causes the different colours of the salt pits in the Saloum Delta in Senegal

What causes the different colours of the salts pits in the Saloum Delta in Senegal?
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11 votes
7 answers
5k views

While desalinating ocean water, would it be bad if we didn't pump the brine back into the ocean?

Desalinating ocean water takes seawater, separates the fresh water from the brine, and usually pumps the brine back into the ocean. But what if we didn't pump the brine back into the ocean? (For ...
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10 votes
2 answers
955 views

Where does the lithium in Salar de Uyuni comes from?

Salar de Uyuni in Bolivia holds a large percentage of the world's lithium reserves. Since the lithium is dissolved as LiCl in the brine, it makes extraction much easier than the alternative: Li ...
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10 votes
2 answers
7k views

Lake Manasarovar v.s. Lake Rakshastal: fresh-water v.s. salt-water

In Tibetan Plateau, about 4600m elevation, If Lake Manasarovar and Lake Rakshastal ("lake of the demon" ) used to be the same lake, but due to the tectonic activity now they are separated to two by ...
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10 votes
1 answer
2k views

Differences between TEOS-10 and EOS-80 for salinity

In 2009, the oceanographic community decided to adopt the Thermodynamic Equation Of Seawater - 2010 (www.teos-10.org) as the standard to calculate the properties of seawater. As part of that, they ...
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8 votes
2 answers
305 views

How does heat get transported between the surface layer, twilight zone, and the deep ocean?

Just as importantly, how do we measure the heat that's transported from the surface layer into the twilight zone and deep oceans?
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7 votes
2 answers
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Thermohaline: Why is cold and dense seawater salty when warm water holds more dissolved salts?

I read that thermohaline circulation is caused by cold and saline water sinking, while warm and less dense water rises. link I understand that saline water is more dense, as there is a higher mass ...
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7 votes
1 answer
471 views

Why is ocean salinity not a good chronometer?

In 1910, George Becker published The Age of the Earth, in which he used the sodium accumulation rate in the ocean to estimate the earth's age as 50 to 70 million years. We now know through various ...
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7 votes
2 answers
400 views

How does salinity and density affects sea surface temperature?

I was reading Planning Commission report of Five Year plan (2012-2017) of India, and in the context of Inter-linking of rivers it is mentioned that : The presence of a low salinity layer of water ...
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7 votes
1 answer
107 views

Is salt accumulating over time?

The rainfall leaches salts (Mg,Na,Ca,K,.., Cl) from weathering rocks, where those ions were freed from chemical bonds by sunlight, acidic water etc. The runoff eventually goes into the oceans, where ...
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7 votes
0 answers
100 views

Using salinity to predict rainfall

Recently, a new method has been proposed by Ray Schmitt (WHOI) and collaborators to use salinity patterns in the ocean to predict weather events (more specifically, rainfall) at scales from weeks to ...
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6 votes
1 answer
309 views

Thermohaline Circulation in the Oceans

I'm slightly confused by how thermohaline circulation works in the Earth's oceans. Is it different for surface water as opposed to deep water? I thought that warm water from the equator is ...
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5 votes
1 answer
109 views

How to determine the annual harmonics of temperature and salinity data?

This is a question on methodology. But I have 4d temperature and salinity gridded data (time, depth, lat and lon). The time is in monthly time steps. How would I get the annual harmonics of ...
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5 votes
1 answer
371 views

When sea water evaporates does it carry small amounts of salt into the atmosphere?

I’m interested to know, because we live near the beach and all the metal on the outside of our house is corroded. My dad says it was from the wind picking up spray from the surf, but I’m not so sure.
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  • 81
5 votes
0 answers
54 views

Salinity balance in the oceans, is it increasing over time? [duplicate]

My 13 yr old kid is studying the water cycle and has raised me some question I don't have answers to regarding how the salinity levels of the oceans are kept constant (over very long period of time) ...
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4 votes
3 answers
4k views

Where does all the salt come from in the Dead Sea?

Usually when I think of a lake it should be sweet water as all the water is coming from rivers/mountains and rain and, because it is very low situated, all ground water should also flow into it. But ...
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4 votes
2 answers
60 views

Effect of organic matter on salinity

Organic manure is used in agriculture around the globe. I am interested in how does organic matter affect the salinity of soil? Does it increases, increases or remains unaffected? and is there a study ...
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4 votes
0 answers
75 views

Oxygen-18 in saline water and freshwater

Which has higher $\delta {}^{18} \text{O}$, saline water or freshwater? I searched for this question and found many researches about the relationship between $\delta {}^{18} \text{O}$ and salinity. ...
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4 votes
0 answers
67 views

Reason for higher content of Iodine and Copper than Iron in Seawater?

Does mineral weight contribute to the prevalence of minerals in seawater? Why is there five times more copper in seawater than Iron? Why is there 4000 times more strontium in seawather than Iron, ...
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3 votes
1 answer
98 views

Before the artificial changes of the Aral Sea, what was its average depth and salinity?

The Aral Sea was a major lake of the USSR until it suffered artificial changes, which began sometime no later than the 1960s. I am unfortunately not sure when major artificial changes began. ...
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3 votes
0 answers
44 views

Increase in Stratification late monsoon in Bay of Bengal

I am involved in an experiment in the Bay of Bengal, letting moorings for a year long period and doing ship cruises. We have observed (from mooring CTDs) that the Brunt Vaisala frequency has increased ...
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  • 111
1 vote
3 answers
212 views

Thermohaline current in North Atlantic

The thermohaline current in the North Atlantic ocean sinks because it gets cooled, or it gets cooled because of sinking?
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