Well, I should say my apologies for contributing to a slight derailment of the thread. My suggestions for climate layouts were only meant as posibilites, and the "arbitrary and limiting"-ness was actually fully intentional. Having a smattering of frozen tundras randomly distributed across the map willy nilly, as if "frozen bits" were just treated the same way as "swamp" or "grassland" seems even more "arbitrary" to me than a global-level scheme would be. If map size is the issue, then there's really no way around that other than scrapping the biome idea altogether, or making the map 10 or 20 or more SGs wide.

Regardless of how the climate regions are dealt with, the idea of using ice itself as a material for food storage and transport is kinda neat. Is food decay a looming possibility over all? Or are you just suggesting it for a new group of "tundra" based frozen foods?
"Bein' a minotaur is a lot like bein' a regular human except moo" - J. Rowland