Integrating federal research on global change and climate change

Last week, the Interior Department’s US Geological Survey (USGS) released details about a landmark airborne survey of permafrost in the Yukon Flats of Alaska that yielded some of the most detailed, data-rich maps of permafrost ever generated. Permafrost—frozen ground that remains at or below water’s freezing point for at least two years—accounts for only 0.022% of all water on Earth, but it covers more than 20% of exposed land of Earth’s northern high latitudes (in addition to areas of Antarctica and the Patagonia region), where it plays a potentially important role in climate dynamics. Continue reading...