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 & Physics, 2025)