The location of the MJO can influence the strength of the Hadley circulation at certain positions (longitudes) depending on where the enhanced and suppressed phases are located.  More here:   https://www.climate.gov/news-features/blogs/enso/what-mjo-and-why-do-we…  ... where rainfall is greater than average, you can assume there is more rising motion and as a result the north-south oriented overturning circulation (Hadley) in that region is increased.   But the opposite is true when rainfall is less than average.