Radium Inputs Into the Arctic Ocean From Rivers: A Basin‐Wide Estimate

Radium isotopes have been used to trace nutrient, carbon, and metal fluxes inputs from ocean margins. However, these approaches require a full accounting of radium sources the coastal including rivers. Here, we aim quantify river into Arctic Ocean for first time 226Ra refine estimates 228Ra. Using new existing data, find that estimated combined (dissolved plus desorbed) annual 228Ra are [7.0–9.4] × 1014 dpm y−1 [15–18] y−1, respectively. Of totals, 44% 60% 228Ra, respectively suspended sediment desorption, which were laboratory incubation experiments. Ra isotope data 20 major rivers around world, derived global [7.4–17] 1015 [15–27] As climate change spurs rapid warming, hydrological cycles intensifying ice cover permafrost diminishing. These will serve as valuable baseline attempt understand changes warming temperatures having on biogeochemically important elements zone.