Some beautiful captures here. Congratulations on your success at -35C. I know from experience how utterly difficult that is from near frozen fingers to camera movements that become “slower than molasses in a January”.
Have you considered adding a lens correction to help the trees regain their upright stature? It seems to be a thing now to emphasize the use of a super wide angle (as in ‘Gee, look what lens I have’), but to me, it seems unnecessarily ‘incorrect’ from a nature photography perspective.
However, if it is entirely intentional and you prefer the look, then ignore my conventional perspective.