I have been asked whether the freeze-thaw cycles ushered in by climate change will improve conditions for ice climbing. The theory is that meltwater from a thaw will refreeze, rejuvenating ice routes that had been poked full of holes by axes.
First, the Republican disclaimer “I’m not a scientist, but …”
Look at the Catskills: shorter, warmer winter means shorter ice season. No question. Yet freeze-thaw does produce ice, as long as the bedrock is cold. Note that a viciously cold night here in autumn does very little. Yet that same night in March makes for some good new routes, like those Ian Osteyee fast-freeze routes at Poke-O. The drips hits cold rock and freezes, same as in the formation of black ice on roads. » Continue Reading.