In recent decades, increasing water demand, dry conditions and warming temperatures have impacted the Colorado River, creating greater un
Navigating a River of Knowledge
Greenland Ice Sheet Meltwater Can Flow in Winter, Too
Liquid meltwater can sometimes flow deep below the Greenland Ice Sheet in winter, not just in the summer, according to CIRES-led work published in the AGU journal Geophysical Research Letters. That finding means that scientists seeking to understand sea-level rise and the future of the Greenland Ice Sheet need to collect data during the dark Arctic winter with scant hours of daylight and temperatures that dip below -30 degrees.
International Ozone Treaty Stops Changes in Southern Hemisphere Winds
Chemicals that deplete Earth’s protective ozone layer have also been triggering changes in Southern Hemisphere atmospheric circulation. Now, new research in Nature finds that those changes have paused and might even be reversing because of the Montreal Protocol, an international treaty that successfully phased out use of ozone-depleting chemicals.