Related topics: ocean

Antarctica's ocean brightens clouds

The teeming life in the Southern Ocean, which encircles Antarctica, contributes to brightening the clouds that form there, according to a study published today in Atmospheric Chemistry and Physics. The clouds are bright because ...

Protecting 30 percent of oceans a huge challenge for the planet

How do we go from protecting eight percent of marine areas to 30 percent in less than 10 years? This question is at the heart of a global forum in Canada this weekend aiming to save marine ecosystems under threat from overfishing, ...

Dutch flood memories unleash new climate fears

Seventy years after the worst natural disaster to strike the Netherlands, Chiem de Vos, seven at the time, still hears his neighbour's desperate cries of "My children are drowning!" ringing in his ears.

page 1 from 40

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.

This text uses material from Wikipedia, licensed under CC BY-SA