Includes sea level rise; extreme weather; changes to ecosystems, plants and animals; melting ice and permafrost; ocean wamring; impacts to water resources, agriculture, public health and national security

While many of us were wrapped up in March Madness this spring, Alaska residents and people across the globe participated in a different kind of competition.

(animation) Decades ago, the majority of the Arctic's winter ice pack was made up of thick, perennial ice. Today, very old ice is extremely rare.

Fish nursery. Bird sanctuary. Storm surge blocker. Maryland’s Blackwater Marsh Wildlife Refuge is all those things and more. And it could be completely underwater by the end of this century. A team of ecologists and climate experts is determined to find and conserve migration corridors for the critical wetland ecosystem.

From changes in cooling degree days to the local effects of El Niño, the Local Climate Analysis Tool helps meteorologists and others understand the connection between global climate and local impacts.

Decision Maker's Toolbox Annual Greenhouse Gas Index

Since 2004, researchers in NOAA’s Global Monitoring Division have released the Annual Greenhouse Gas Index: a single value that compares the total warming effect of each year's concentrations of heat-trapping gases to 1990 levels.

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