Fig. 3: Intermodel difference in cumulative carbon uptake in the NA and SSS in the NA subpolar region.
From: Present-day North Atlantic salinity constrains future warming of the Northern Hemisphere
a, Simulated present-day cumulative carbon uptake in the NA versus present-day SSS in the NA subpolar region for 18 CMIP6 ESMs. b, Future climate of SSS in the NA subpolar region under the SSP5–8.5 scenario versus that in the present-day climate. The marker, which is on the lower side of the 1:1 line, indicates that the present-day SSS is higher than the future SSS in ESMs. c, Future cumulative carbon uptake in the NA versus future SSS in the NA subpolar region. Shadings indicate the corresponding changes of surface temperature in the NH. The purple dashed ellipse is calculated based on the multivariate normal distribution with 5–95% ranges. Correlation coefficient (Corre. coeff.), slope and P value determined by a two-sided Student’s t-test are also provided with a regression line (black solid line).
