Robotics

Observing Arctic marine life, from the seabed to space

In late May, NTNU researchers and students used a small satellite, an unmanned aerial vehicle, two unmanned boats and subsea robots to survey the same area simultaneously. This is an approach called an observational pyramid.

Energy & Green Tech

Environmentalists oppose more life for California nuke plant

Dozens of environmental and anti-nuclear organizations expressed opposition Tuesday to any attempt to extend the life of California's last operating nuclear power plant, challenging suggestions that its electricity is needed ...

Energy & Green Tech

UN nuclear agency to help monitor Fukushima water release

The United Nations' nuclear watchdog said it reached an agreement with Japan Thursday on helping monitor and review the release of treated radioactive water from the wrecked Fukushima plant into the Pacific Ocean.

Energy & Green Tech

Japan to start releasing Fukushima water into sea in 2 years

Japan's government announced Tuesday it would start releasing treated radioactive water from the wrecked Fukushima nuclear plant into the Pacific Ocean in two years. It's a move that's fiercely opposed by fishermen, residents ...

Energy & Green Tech

Ocean power: A green option failing to make waves

The tidal power plant on the Rance river in Brittany, France, stands as a reminder of the underexploited potential of energy generation from ocean tides, waves and warmth.

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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.

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