Multiple drivers of production and particle export in the western tropical North Atlantic

To assess the impacts of Amazon River discharge, Saharan dust deposition, N 2 ‐fixation and mixed‐layer deepening on the biological carbon pump, sediment traps were moored from October 2012 to November 2013 at two sites in the western tropical North Atlantic (49°W,12°N/57°W,12°N). Particle exports interpreted along with satellite‐ and Argo‐float data show peak fluxes in biogenic silica (31 mg m −2 d −1 ) and organic carbon (25 mg m −2 d −1 )...