Fig. 7: Upper ocean dissolved inorganic carbon and density vertical gradients.
From: Projected poleward migration of the Southern Ocean CO2 sink region under high emissions
a, b Vertical density gradient (\(d\rho /{dz},{top}\)) and c, d vertical dissolved inorganic carbon gradient (dDIC/dz, middle panel) for the Sub-Antarctic (left) and Antarctic (right) regions. Blue lines depict the present climate (1995–2014), orange lines at the end of the 21st century (2080–2099), and black lines are observations (GLODAP) version 2 (2019)). e, f Regression plots between the maximum annual primary production rate and the maximum subsurface DIC gradient for the contemporary climate (1995−2014). The shading in all figures shows the ensemble one standard deviation.
