Related topics: ocean

45 reasons the Great Barrier Reef is in trouble

When the managers of the Great Barrier Reef recently rated its outlook as very poor, a few well-known threats dominated the headlines. But delve deeper into the report and you'll find that this global icon is threatened by ...

Dense Antarctic water returning to the Atlantic

The supply of dense Antarctic water from the bottom of the ocean to the Atlantic has declined in recent years. However, a new study explains for the first time how since 2014 this has stabilized and slightly recovered due ...

Evacuations begin in Bahamas as Category 4 Dorian bears down

Hurricane Dorian shut down most major resorts in the Bahamas and forced authorities to evacuate much of the northern shore and low-lying islands Saturday as the fierce Category 4 storm prepared to unleash torrents of rain ...

Fresh water found in the Norwegian Sea

When we the found fresh water leaking from the seabed, we were very surprised," explains scientist and marine geologist Wei-Li Hong at the Geological Survey of Norway (NGU).

Study reveals profound patterns in globally important algae

A globally important ocean algae is mysteriously scarce in one of the most productive regions of the Atlantic Ocean, according to a new paper in Deep Sea Research I. A massive dataset has revealed patterns in the regions ...

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Seawater

Seawater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of about 3.5%. This means that every 1 kg of seawater has approximately 35 grams of dissolved salts (mostly, but not entirely, the ions of sodium chloride: Na+, Cl-). The average density of seawater at the surface of the ocean is 1.025 g/ml; seawater is denser than freshwater (which reaches a maximum density of 1.000 g/ml at a temperature of 4°C) because of the added mass of the salts. The freezing point of sea water decreases with increasing salinity and is about -2°C (28.4°F) at 35 gram per liter.

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