Kwiatkowski L. auteur aut IRD Naar J. auteur aut IRD Bopp L. auteur aut IRD Aumont Olivier auteur aut IRD Defrance Dimitri auteur aut IRD Couespel D. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Projections of climate impacts on marine net primary production (NPP) are reliant on Earth System Models (ESMs) that do not contain dynamic ice sheets. We assess the impact of potential Greenland ice sheet meltwater on projections of 21st century NPP using idealized ESM simulations. Under an extreme melt scenario, corresponding to 21st century sea level rise close to 2 m, Greenland meltwater amplified the decline in global NPP from a decrease of 3.2 PgC/yr to a decrease of 4.5 PgC/yr, relative to present. This additional reduction in NPP predominately occurs in the North Atlantic subtropical and subpolar gyres, as well as Atlantic eastern boundary upwelling systems. Accelerated NPP declines are the result of both surface freshening and reductions in upwelling-favorable winds enhancing phytoplankton nutrient limitation. Our findings indicate that including a dynamic Greenland ice sheet in ESMs could have large impacts on projections of future ocean circulation and biogeochemistry. specialized marine primary production climate change Greenland ice sheet meltwater phytoplankton ocean nutrients GROENLAND 036 062 021 020 46 20 11347-11357 2019 0094-8276 https://www.documentation.ird.fr/hor/fdi:010077184 10.1029/2019gl085267 0094-8276 [F B010077184] https://www.documentation.ird.fr/hor/fdi:010077184 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers19-11/010077184.pdf IRD - Base Horizon / Pleins textes 2019-12-12 2025-02-24 fdi:010077184 fre