On the subject of weather and climate change, I'm wondering if there's a word that sums up "the worst case scenario"? At the moment I'm stuck on amplitude, as an expression of the field of/variations in outcomes... But I'm looking for something better! Ideally I'm looking for a tidy expression signifying maximum possible effect: The something something... (Not apocalypse etc) I know it exists, I just can't put my finger on it.
Perhaps, the extreme works, the assumption being that we are considering only the negative (undesirable) direction. Else, typically (in the most simplistic case) there are at least two extremes as in the minimum and maximum. Your own consideration of amplitude actually implies magnitude of the extreme (with respect to a reference point/measurement).
'the extreme to which climate can change.'
extremeNOUN 1.1 The highest or most extreme degree of something:
‘extremes of temperature’