In previous posts on this blog, I have drawn attention to the surging behaviour of some glaciers in the Staunings Alps / Scoresbysund region. This post relates to Oxford Gletscher:
This is my account of the behaviour of Løberen, the "galloping glacier" in Nordvestfjord, Greenland, which has retreated some 7 km since the peak of its last surge:https://www.theguardian.com/travel/2021/oct/03/my-love-affair-with-wales-megaliths-pentre-ifan-in-pembrokeshire
Surge potential and drainage-basin characteristics in East Greenland
Cambridge University Press: 14 September 2017
Hester Jiskoot,Tavi Murray andAdrian Luckman
Surging glaciers in Greenland - a status Anker Weidick
From the above annotated map, we can see that the temperature readings at sites F, A, D, C, H and E might well have been strongly influenced by the surge from the eastern tributary, since they are all within the loop of moraine. However this might have happened, the zero C depth in the glacier is around 2m within this loop -- but I have no idea what the explanation may be! Perhaps this "slab"of ice is anomalously warm, or more susceptible to meltwater penetration, which may explain why it is apparently more mobile than the in situ ice beneath it?