A conveyor belt of ocean water that loops the planet and regulates global temperatures could be heading for a tipping point.

While we can’t usually observe coastal currents from the shoreline, water in the oceans of the world is in constant motion.

The last ice age did not shut down Atlantic ocean currents, and that discovery may help explain future climate risks.

New research shows ancient tropical oceans once held more oxygen than cooler regions, reshaping where early life could ...

Each year, vast blooms of phytoplankton spread across the Southern Ocean, drawing carbon dioxide from the atmosphere and ...

Melting ice sheets open up land and sea that were previously inaccessible, presenting new — albeit dangerous — opportunities.

Four-year record of ocean processes beneath the Ross Ice Shelf suggests water quality varies throughout the year within the ...

During the last ice age, the Atlantic Ocean’s powerful current system remained active and continued to transport warm, salty water from the tropics to the North Atlantic despite extensive ice cover ...

With many rivers and aquifers tapped beyond their limits, U.N. scientists say the world is entering an era of 'water ...

From the frozen tundra to America's tropical south, the states with the most islands in their waters tend to have long ...

As human activities have released greenhouse gases into the atmosphere, trapping excess heat and warming the planet, the ocean has absorbed more than 90% of that excess heat since the 1970s. The ocean ...

Climate change is warming Europe, but scientists are also studying whether a weakened Atlantic current could make Britain colder, with Laurie Laybourne, director of the Strategic Climate Risks ...