Rising concentrations of carbon dioxide in the air lead to more acidic seawater. More acidic water corrodes minerals that many marine creatures rely on to build their protective shells and skeletons.

How do warm waters in the Caribbean this year compare to conditions in 2005, when high ocean temperatures triggered the worst mass coral bleaching event ever seen in the region?

When the winds are right, dust from the deserts of the U.S. Southwest blows onto the snow-capped Rocky Mountains. How do dirty snowfields contribute to the loss of more than 250 billion gallons of water in the Colorado River?

Identifying ocean areas with a deep layer of warm water—places that are storing large amounts of heat—is important for scientists trying to predict whether or not a hurricane will intensify.

As the sun sinks below the horizon at the South Pole, NOAA researchers stationed at the bottom of the world settle in for six months of darkness. Throughout the Antarctic winter, the researchers will collect air samples to help maintain long-term records of trace gases, aerosols, and solar radiation.

Watch what happens when an invasive insect takes its toll on eastern hemlock trees in the Southern Appalachian Mountains.

Coral reefs are important and productive ocean ecosystems, providing shelter and protection for diverse sea life. NOAA's latest seasonal outlook for coral bleaching shows potential for bleaching along the Pacific coast of Mexico and islands in the equatorial central Pacific Ocean.