Interannual Variability in the Source Location of North African Dust Transported to the Amazon

African dust is transported to South America (SA) every winter and spring. Hypotheses suggest that either Western or Central North Africa (e.g., Bodélé Depression) the main source of dust, yet these notions remain largely untested with geochemical data. Using 2 years isotopic measurements (strontium neodymium) collected in SA integrated into a statistical model, we identified strong interannual variability region. supplied 44% long-range 2016 while region accounted for 53% 2014. We propose due differences strength Libyan High precipitation over Gulf Guinea Atlantic Ocean between years. Our findings can improve constraints nutrient deposition predictions how changes climate impact magnitude Amazon.