The glaciers around Puncak Jaya have long been in visible decline. From 1936 to 2006, they lost nearly 80 percent of their area–two-thirds of that since 1970, according to a new paper by glaciologist Michael Prentice of the Indiana Geological Survey, who has long been interested in the area. Satellite images show that from 2002 to 2006 alone, the remaining ice decreased from 2.326 square kilometers to 2.152–a 7.5 percent drop. Now, with researchers there, other signs have become obvious. Take a look at the pictures below of the Northwall Firn Glacier, about 2.5 kilometers from the summit of Puncak Jaya, taken by Paul Q. Warren, a geologist with the Freeport McMoRan company who has been helping plan and execute the ice-coring project since October 2008.