Boundary Controls on Radium‐223 and Radium‐228 Distributions Along GEOTRACES GP17‐OCE: Implications for Trace Element Transport in the Distal South Pacific Ocean

Abstract In regions far removed from major atmospheric dust sources, such as the South Pacific and Southern Ocean, boundary exchange processes play a dominant role in regulating the supply of trace elements and their isotopes (TEIs) to the upper ocean, with important consequences for ecological stoi