Zhang et al. interpret the mixed-layer energy budget in models as showing that “ocean dynamics play a central role in the AMO.” Here, we show that their diagnostics cannot reveal the causes of the Atlantic Multidecadal Oscillation (AMO) and that their results can be explained with minimal ocean influence. Hence, we reaffirm our findings that the AMO in models can be understood primarily as the upper-ocean thermal response to stochastic atmospheric forcing.
Authors: Amy Clement, Mark A. Cane, Lisa N. Murphy, Katinka Bellomo, Thorsten Mauritsen, Bjorn Stevens
read on at Science Magazine