We reported on similar “Shock News” back in February 2015, and now it’s happened again.
Here is a large animation of recent events at the Jakobshavn Glacier calving front, courtesy of Espen Olsen at the Arctic Sea Ice Forum.
Click to view the ~5 Mb file at full resolution:
In the absence of further input from the somewhat “skeptical” commenter below, here is an extract from one of the “~1420 recent academic articles” referred to. Namely “Bed elevation of Jakobshavn Isbrae, West Greenland, from high-resolution airborne gravity and other data: Bed topography of Jakobshavn Glacier” by Lu An, Eric Rignot et al.:
Jakobshavn Isbræ, West Greenland, which holds a 0.6 m sea level volume equivalent, has been speeding up and retreating since the late 1990s. Interpretation of its retreat has been hindered by difficulties in measuring its ice thickness with airborne radar depth sounders. Here we employ high-resolution, helicopter-borne gravity data from 2012 to reconstruct its bed elevation within 50 km of the ocean margin using a three-dimensional inversion constrained by fjord bathymetry data offshore and a mass conservation algorithm inland.
We find the glacier trough to be asymmetric and several 100 m deeper than estimated previously in the lower part. From 1996 to 2016, the grounding line migrated at 0.6 km/yr from 700 m to 1100 m depth. Upstream, the bed drops to 1600 m over 10 km then slowly climbs to 1200 m depth in 40 km.
Jakobshavn Isbræ will continue to retreat along a retrograde slope for decades to come.
Watch this space!