This is a placeholder for now. I will address this topic based on my newly energized global atmospheric circulation research along with my past contributions in aspects of probabilistic volcanic hazard analyses (PVHA)* and the modeling of atmospheric transport of tephra.
Spoiler: The latitude of an eruption within the Earth’s geostrophic circulation regime, the residence times of the plume, the chemical and physical compositions, along with historical observations relevant to climate (as opposed to weather) will be highlighted.
* Including an award winning investigation. Search the linked page for “serious games” award near bottom.