Yih may not have polar ice caps. If there are few continents, that means the ocean currents can freely flow between equator and poles, moderating the global climate. This means the south pole, which is part of Damsback, can be colonized.
Keeping with my use of outdated theories to construct Focus, yih may only have significant land south of the equator. Very old theories about the arrangement of land on earth said there was no or very little land in the southern hemisphere (in Purgatorio Dante calls the southern hemisphere the hemisphere of water for example.)