Wednesday, September 26, 2012
New paper finds glaciers in Glacier National Park retreated up to 6 times faster during the 1930's than the past 40 years
A new paper published in Quaternary Science Reviews finds that alpine glaciers in Glacier National Park, Montana retreated up to 6 times faster during the 1930's and 1940's than over the past 40 years. The "Multi-proxy study of sediment cores retrieved from lakes below modern glaciers supports the first detailed Neoglacial chronology for Glacier National Park (GNP)" and shows "maximum reconstructed retreat rates [in] 1930" of about 125 meters per year, compared to near zero in ~1975 and about 20 meters/year at the end of the record in ~2005. The authors report, "Results indicate that alpine glaciers in Glacier National Park advanced and retreated numerous times during the Holocene after the onset of Neoglaciation 6,500 years before the present" and "Retreat from the Little Ice Age maximum was the most dramatic episode of ice retreat in at least the last 1000 years."
A lacustrine-based Neoglacial record for Glacier National Park, Montana, USA
Posted by MS at 4:48 PM