William Kininmonth essentially says that it’s possible that the trade winds have changed the climate, but asks why the winds themselves changed. Kininmonth explains that the ocean is much larger and holds much more heat than the atmosphere, and that the ocean drives the winds rather than the other way around. He points out again (as he did before here so eloquently in more detail) that what the paper describes is what we’ve known for a long time about the ENSO patterns and the Pacific Decadal Oscillation (PDO): when an El Nino Strikes, trade winds fall, ocean surface doesn’t turn over as much, the ocean surface is warmer, and the air stays hot above. When La Nina’s occur, trade winds speed up, the ocean stirs, and the cold deep water takes the heat out of the surface of the ocean and the air above.
His points are:
“Natural variability” is hardly a credible, useful scientific explanation. The IPCC said natural variability was small, so if it is larger now, then it was also larger during the rest of the 20th Century? This reduces the effect CO2 had earlier (and the effect it will have in future).