Sources, sinks, and cycling of dissolved organic copper binding ligands in the ocean

Abstract Organic Cu-binding ligands have a fundamental influence on Cu distributions in the global ocean and they complex >99% of dissolved seawater. however, represent large diversity compounds with distinct sources, sinks chemical properties. This heterogeneity makes organic ligand pool difficult to study at scale. In this review, we provide an overview that compose marine Cu-ligand pool, their dominant sources sinks. We also summarize most common analytical methods measure water column samples. Generally, are classified according conditional binding strength Cu. However, lack definition for categories has previously complicated data intercomparison. To address this, general classification discuss emerging patterns classification. date, there is no biogeochemical model explicitly represents ligands. estimates fluxes key interfaces as first order step future modeling efforts focused