Ensembles versus method disagreement

ps_surface_ensemble() combines geometrically and vertically compatible head surfaces using explicit weights or summary statistics. ps_method_disagreement() maps range, spread, pairwise head differences, and circular down-gradient direction differences. Component spread describes method disagreement, not sampling uncertainty or a confidence interval. An ensemble is not automatically more accurate than its components.

ensemble <- ps_surface_ensemble(result, statistic="weighted_mean", weights=w)
disagreement <- ps_method_disagreement(result)