What will happen if the AO changes is an open question, at one side there may be less inflow of warmer air, at the other side, this may result in opposite changes in cloud cover... (realclimate.org)
Women in the LPR group continued to lose body weight and fat mass during the weight - maintenance period, whereas opposite changes were observed in the placebo group. (cambridge.org)
If the classic Stommel model is correct, that means that the southward interior gyre flow (which is what you appear to be referring to) also must not be changing, since there would have to be an equal and opposite change measured in the Gulf Stream, and no change was found. (realclimate.org)