Yes, I think that's obvious, but my question was about the relative contributions of air temp, insolation, wind driven advection to warmer waters, etc. Air doesn't have a lot of thermal capacity (relative to ice), but there is a lot of it (relative to ice), so the equation comes down to how efficiently warm air can dump its heat into the ice and then move on. The question is relevant to Greenland, as well, where it seems that insolation and albedo have more to do with surface melt than air temperature. But all factors contribute -- so I'm trying to learn what those relative contributions are.