I posted a detail around Helheim in the 'retreat'-thread. As you can see over there, Helheim glacier already retreated to just 6 km from the steep slope into the mainland by '09.
What is seen on the Sentinel image illustrates the difficulties in interpreting the different properties of the features on most images. Sentinel is radar, right? I suggest the backscatter would represent the chaotic debris in the fjord as blanketwhite as we imagine a glacier to be.
In summer, MODIS true color provides a better tool to interpret these differences.
Never mind, my first post on Neven's blog was about a swath of meltwater I thought to notice on Kangerdlugssuaq glacier. It turned out to be a shadow from clouds around a nunatakker .