Keywords: nps ccrp climate change climatechange global warming globalwarming lyell glacier yosemite tbt throwbackthursday outdoor We're saying goodbye to an old friend in Yosemite National Park. The Lyell Glacier - second largest in the Sierra Nevada - has thinned rapidly over just the last few years. Note the newly exposed bedrock on the east (left) side; it's estimated the glacier may now be only 15-20 feet thick. Currently the glacier is losing on average about three feet of thickness each year. How much longer until it's gone? For more photos and to learn more about annual Lyell Glacier surveys, check out the Yosemite Ranger Notes blog. Learn why the glacier is no longer really considered a "glacier" anymore. Photos: Greg Stock/NPS We're saying goodbye to an old friend in Yosemite National Park. The Lyell Glacier - second largest in the Sierra Nevada - has thinned rapidly over just the last few years. Note the newly exposed bedrock on the east (left) side; it's estimated the glacier may now be only 15-20 feet thick. Currently the glacier is losing on average about three feet of thickness each year. How much longer until it's gone? For more photos and to learn more about annual Lyell Glacier surveys, check out the Yosemite Ranger Notes blog. Learn why the glacier is no longer really considered a "glacier" anymore. Photos: Greg Stock/NPS |