Fig. 6: AMOC strength in 3 separate DAMIP experiments and CMIP6 simulations. | npj Climate and Atmospheric Science

Fig. 6: AMOC strength in 3 separate DAMIP experiments and CMIP6 simulations.

From: North Atlantic temperature and salinity changes are driven by external forcing, underestimated by CMIP6 models

Fig. 6

a Time series of multi-model ensemble-mean AMOC strength at 30°N for the 1950-2020 time period for single-forcing DAMIP runs: AER (orange), NAT (green), GHG (red). Lines represent the average of the 12 DAMIP models in Table S1. Also shown in grey is the “ALL” simulation for 1950–2050. “ALL” includes all forcings and represents the historical simulation up to 2014 followed by the SSP5-8.5 scenario for CMIP6 models (average over the 12 models in Table S1). b AMOC historical anomalies relative to the NAT forcing (full black line) is well approximated by the sum of AMOC anomalies due to aerosols and greenhouse gas (dotted black line). The latter is calculated as (AER – NAT) + (GHG – NAT). The 1955–1974 and 2002–2020 periods used in the paper to calculate climate fingerprints are shown with gray shading. Note the clear trend in the GHG from one period to the next.

Back to article page