Abstract:Tropical South America spans about one-tenth of the Earth's circumference from east to west (zonally). There is mounting evidence that rainfall across this stretch has varied in a zonal "dipole" fashion in the late Quaternary (here, the last ∼25 kyr) with rainfall increasing in northeastern Brazil at the expense of drying in western
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.