I thought about that, but while it's true that a glacier acts as a buffer, I guess that rain at those altitudes always falls as snow- for the majority of the ye

I thought about that, but while it's true that a glacier acts as a buffer, I guess that rain at those altitudes always falls as snow- for the majority of the year but probably in the summer as well- then proceeds to melt away during the summer. So the buffer effect shouldn't be entirely gone.