It is well understood as to why treeline altitudes vary between the Northern and Southern Hemispheres.

Question

Quizplus · Accepted Answer

The exact reasons for the variation in treeline altitudes between the Northern and Southern Hemispheres are not fully understood. Factors such as climate, soil type, and local topography play a role, but the complex interactions between these factors and how they differ across hemispheres are still a subject of ongoing research.

It Is Well Understood as to Why Treeline Altitudes Vary