Radium isotopes as submarine groundwater discharge (SGD) tracers: Review and recommendations

• DOI: 10.1016/j.earscirev.2021.103681
• Publication Date: 2021-05-14T02:03:39Z
• Authors: J. Garcia-Orellana; V. Rodellas; J. Tamborski; M. Diego-Feliu; P. van Beek; Y. Weinstein; M. Charette; A. Alorda-Kleinglass; H.A. Michael; T. Stieglitz; J. Scholten
• Keywords: Submarine groundwater discharge; Radium

Submarine groundwater discharge (SGD) is now recognized as an important process of the hydrological cycle worldwide and plays a major role conveyor dissolved compounds to ocean. Naturally occurring radium isotopes (223Ra, 224Ra, 226Ra 228Ra) are widely employed geochemical tracers in marine environments. Whilst Ra were initially predominantly applied study open ocean processes fluxes across continental margins, their most common application environment has undoubtedly become identification quantification SGD. This review focuses on SGD associated inputs water solutes coastal In addition, we i) controlling enrichment depletion seawater; ii) systematics estimate using iii) summarize additional applications studies. We also provide some considerations that will help refine estimates identify critical knowledge gaps research needs related current use tracers.