The OHT changes are mainly driven by temperature changes

The ocean heat transport (OHT) changes through all Arctic straits are mainly driven by the changes in temperature and the temperature-velocity covariance (Fig. 19 of the Atlantic and Pacific SST experiments). The OHT changes at the Barents Sea Opening (BSO) in the Atlantic experiments are first driven by the changes in temperature, with considerable influence of the velocity and covariance contributions for the wide Atlantic experiment, while these changes are shared by all 3 contributions in the Pacific experiments (Fig. 20 of the Atlantic and Pacific SST experiments). The OHT changes at the Bering Strait are relatively small in the Atlantic experiments and are mainly driven by the changes in temperature in the Pacific experiments (Fig. 21 of the Atlantic and Pacific SST experiments).