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Water science news, explainers, and statistics covering freshwater, hydrology, lakes, rivers, groundwater, ice, and Earth’s connected water systems.

Diagram of the biological pump in the ocean carbon cycle

Ocean chemistry is reshaping the planet’s carbon conveyor

A 2025 NOAA analysis in Global Biogeochemical Cycles found signs that ocean acidification is changing a feedback in the global carbon cycle. The result matters because the sea absorbs carbon dioxide from the air, stores part of it for long periods and helps slow the buildup of heat-trapping gas in the atmosphere. That work shines…

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Shoreline at low tide in Burien, Washington

How the Moon and Sun pull Earth’s oceans into a tidal rhythm

NOAA’s National Ocean Service explains in its tides overview how gravity turns entire oceans into slow-moving waves. This regular rise and fall shapes coastal ecosystems, changes water depths and controls currents through harbors and narrow channels. Accurate tide predictions help ships navigate safely and allow coastal communities to prepare for unusually high water. The familiar…

Lake Baikal Russia

Ten of Asia’s largest lakes, from the Caspian Sea to Lake Van

At about 386,400 square kilometers, the Caspian Sea covers more surface than the other nine lakes in this selection combined. Asia’s largest inland waters extend from Arctic tundra to desert basins and their differences reach far beyond size. They include the planet’s deepest lake, a lake split between fresh and saline water and several basins…

Aerial view of floating solar panels in Pasir Mas, Kelantan, illustrating renewable energy technology.

Chile’s first floating solar salmon pen is projected to supply 57% of a remote fish farm’s energy while cutting diesel use

Mowi Chile has launched the country’s first floating solar pen at its Huar Norte salmon farm. The marine energy system combines photovoltaic panels with batteries and power controls. According to project partner AKVA group, renewable energy is expected to supply about 57% of the site’s electricity needs. The installation is designed to reduce the farm’s…