Ted Scambos, lead scientist at the U.S. National Snow and Ice Data Center, noted that this calving event marks a retreat of the Petermann Glacier “farther back than historical calving fronts.” A comparison of this event to the 2010 event shows that this iceberg broke off the glacier tongue farther upstream. The crack along the southern margin of this new iceberg, however, has been visible in satellite imagery for several years. That rift was first identified in 2001.
gorgonymus gorgward writes: NASA Earth Observatory reports that the Petermann Glacier has lost a chunk of ice roughly half the size of the one it lost two years ago. Pictures show that the break-off happened over the course of two days, monday 16 to tuesday 17 july.