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Decline in Atlantic Primary Production Accelerated by Greenland Ice Sheet Melt

doi: 10.1029/2019gl085267
Decline in Atlantic Primary Production Accelerated by Greenland Ice Sheet Melt
AbstractProjections 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.
[SDE] Environmental Sciences, 550, [SDE.MCG]Environmental Sciences/Global Changes, Greenland, 551, [SDU] Sciences of the Universe [physics], marine primary production, ocean nutrients, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, [SDV.EE]Life Sciences [q-bio]/Ecology, [SDV.EE.ECO] Life Sciences [q-bio]/Ecology, environment/Ecosystems, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Vegetal Biology, Atmosphere, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, 500, ice sheet, [SDE.MCG] Environmental Sciences/Global Changes, [SDV.EE] Life Sciences [q-bio]/Ecology, environment, climate change, [SDU]Sciences of the Universe [physics], meltwater, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, [SDE]Environmental Sciences, phytoplankton, environment/Ecosystems, environment, Biologie végétale
[SDE] Environmental Sciences, 550, [SDE.MCG]Environmental Sciences/Global Changes, Greenland, 551, [SDU] Sciences of the Universe [physics], marine primary production, ocean nutrients, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, environment/Ecosystems, [SDV.EE]Life Sciences [q-bio]/Ecology, [SDV.EE.ECO] Life Sciences [q-bio]/Ecology, environment/Ecosystems, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Vegetal Biology, Atmosphere, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, 500, ice sheet, [SDE.MCG] Environmental Sciences/Global Changes, [SDV.EE] Life Sciences [q-bio]/Ecology, environment, climate change, [SDU]Sciences of the Universe [physics], meltwater, [SDV.EE.ECO]Life Sciences [q-bio]/Ecology, [SDE]Environmental Sciences, phytoplankton, environment/Ecosystems, environment, Biologie végétale
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