Why are the seas salty? - CrowdScience podcast, BBC World Service

BBC CrowdScience listener Julie lives close to the coast in New Zealand and wants to know why the water that washes up on the beach isn't fresh. How exactly does all that salt get into the world's oceans?

In India, a country where salt became symbolic of much more than well-seasoned food, presenter Chhavi Sachdev visits coastal salt farms and a research institute dedicated to studying all things saline, to better understand our relationship with salty seas.

The team also ventures to a very briny lake on the other side of the globe in Salt Lake City, Utah, to learn how salt makes its way into water bodies.

Speaking to an expert in deep sea exploration, we learn how hydrothermal vents may play a role in regulating ocean saltiness and how much the field still has to explore.

Meanwhile, listener Will wants to know how much melting ice sheets are affecting ocean salinity. But ice melt isn’t the only thing affecting salt levels when it comes to the impacts of climate change.

And... how many teaspoons of salt are in a kilogram of sea water anyway? We do the rigorous science to answer all these salient saline questions.

00:00 Salt farming in India
03:57 Why is the Great Salt Lake so salty?
07:26 How does salt get into salty lakes and seas?
10:56 How salty is the sea?
13:17 Hydrothermal vents
17:06 Deepika’s salt farm
18:03 Large scale salt manufacturing
19:30 Will climate change dilute the salty seas?
25:15 How has climate change affected the salt industry?
28:05 How can salt farmers adapt?

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[ii-vfzs]

Brilliant. 🙏🏻🍃It would be nice to see the pictures for longer.

[hhhghhgy]

Can you create an episode about GAD and the relationship between caffeine and stress?

[andriesscheper]

Not only in the sea. In several lakes as well, and deposits in layers of earths crust from times when former seas evapourated. Even in the himalayas. 😮

[JimTimber]

My cousin was an old salt.. served twenty years as a Royal Marine

[abcevoturbobonker]

Questions you shouldn't ask if you went to school..

[tukmol]

Why is there so much sand on the beach?

[analizaperez]

Just like our tears, it taste like salt. Also our sweat. Try niyo ipunin ang iyak o pawis tapos lutuin niyo. Tingnan niyo kung magiging asin. Diba, magandang experiment yun?

[shankarsingh]

I didnt find any satisfactory answer for do the melting ice reduces salinity of water instead you rose another question and turned to climate changed.