Aridity/Forestation Zone Scaling

[SoupInCat]

I know that the temperature zone changes based on distances between the poles, but the aridity and forested level changes differently. I’d like to be able to increase the scales of these zones so that particular “biomes” appear larger. Larger arid zones in the south for larger deserts, rainforests that go for miles, etc. I was wondering if there is a way to do this?