Critical load exceedances for North America and Europe using an ensemble of models and an investigation of causes of environmental impact estimate variability: an AQMEII4 study - Makar, Paul A; Cheung, Philip; Hogrefe, Christian; Akingunola, Ayodeji; Alyuz, Ummugulsum; Bash, Jesse O; Bell, Michael D; Bellasio, Roberto; Bianconi, Roberto; Butler, Tim; Cathcart, Hazel; Clifton, Olivia E; et al. (Atmospheric Chemistry And Physics, 2025)