If you ski or hike, you may have already seen these strange expanses of pinkish glaciers. Well know that their coloring is not consecutive to a savage training of rugby players from the Stade Français but to the presence, at altitude, of
Chlamydomonas nivalis, an alga – yes, yes, an alga! – which takes advantage of the spring heat to proliferate.
A not very rosy future
If some find it pretty, is this phenomenon, nicknamed “watermelon snow” or “ice blood”, harmful? And what is the presence of the algae that causes it due? This is what scientists are trying to determine by studying its manifestations on many glaciers around the world.
Discover their conclusions in this video from our partner Brut: