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Observing & Predicting
Department:October 22, 2009As the ocean absorbs atmospheric carbon dioxide, the pH of the water drops. The more acidic water harms corals and other shell-building sea life.
Department:August 24, 2021The Sun's average brightness varies over time, and the changes can affect global surface temperature. But long-term changes over the period of human-caused global warming are minimal.
Department:March 15, 2021Temperatures measured on land and at sea for more than a century show that Earth's globally averaged surface temperature is rising.
Department:September 8, 2020Since satellite-based measurements began in the late 1970s, Arctic sea ice extent has decreased in all months and virtually all regions The 14 lowest extents in the satellite era have all occurred in the last 14 years.
Department:August 14, 2020Human activities, mainly burning fossil fuels, are increasing the amount of carbon dioxide in our atmosphere, amplifying the natural greenhouse effect and making the pH of the ocean more acidic.
Department:August 30, 2009The Oceanic Nino Index tracks the sea surface temperature in the east-central tropical Pacific Ocean. It is NOAA's primary indicator of the climate patterns known as El Niño and La Niña.
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