In brief
At higher altitudes, rising and evaporation behave differently.
Useful to know
At higher altitudes, rising and evaporation behave differently. King Arthur offers adjustments by altitude and type of bake rather than one formula for every situation. [1]
If baking changes after a move, record the location, tin, temperature and result. Begin with small adjustments from the appropriate guide. Do not add more leavening simply out of habit: overly rapid expansion may be part of the problem. A useful comparison keeps the basic recipe consistent and makes each alteration traceable.
Sources
For further detail and to check the information: