AUTHOR=Fourrier Marine , Coppola Laurent , Claustre Hervé , D'Ortenzio Fabrizio , Sauzède Raphaëlle , Gattuso Jean-Pierre TITLE=Corrigendum: A Regional Neural Network Approach to Estimate Water-Column Nutrient Concentrations and Carbonate System Variables in the Mediterranean Sea: CANYON-MED JOURNAL=Frontiers in Marine Science VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/marine-science/articles/10.3389/fmars.2021.650509 DOI=10.3389/fmars.2021.650509 ISSN=2296-7745