OCEANS PROBABLY ONCE HAD A LOT MORE SALT
Slot Online Terpercaya Earth's ancient oceans likely contained much more salt than they do today, scientists say.
Agen Slot Terpercaya The finding may clarify how its life, atmosphere, and climate evolved.
Slot Online Terpercaya In a new studi in the Proceedings of the National Academy of Sciences, researchers suggest that for the first 500 million years of Earth's existence, its oceans may have contained a salt tingkat as high as 7.5%. Today's oceans, by comparison, are about 2.5% salt.
Wave88 Previous estimates for salinity of the early oceans, all based on indirect data, ranged from the current tingkat to 10 times higher.
Slot Online Terpercaya "This is just the beginning of deciphering the chemistry of the early ocean, as there are many other unknowns, but now we have a kompak foundation to build upon," says Jun Korenaga, professor of earth dan planetary sciences at Yale University.
Agen Slot Terpercaya Korenaga and graduate student Meng Guo began their research with a broader, more esensial question in mind. They wanted to know how much stable halogen material—elements such as fluorine, chlorine (found in salt), bromine, and iodine that, when they react with metals, produce a kisaran of salts—exists on Earth.
Wave88 Halogens play a critical role in some of the most basic processes terkait to the planet's formation and evolution, including the way Earth's atmosphere, oceans, and rocky mantle interact. The presence of halogens in seawater is particularly important, due to the essential nature of oceans in making life on Earth possible.
Agen Slot Terpercaya "Seawater chemistry dictates not only the acidity of the ocean, but also the way carbon dioxide is partitioned between the atmosphere and the ocean," Guo says.
