![Ratio of the precipitation variances between the active and inactive winter MJO days between 1979 and 2017 using a permutation test with 1000 iterations. The variance ratio shows the percentage of increased or decreased precipitation variance that occurs on active winter MJO days vs inactive winter MJO days. The significant (at the 90% level) regions are highlighted by solid black contours and are stippled within.](https://i0.wp.com/idsc.miami.edu/wp-content/uploads/2020/12/full-jcli-d-19-0448-1-f7.jpg?resize=730%2C350&ssl=1)
How MJO Teleconnections and ENSO Interferencce Impacts U.S. Precipitation
A composite analysis reveals how the Madden–Julian oscillation (MJO) impacts North American rainfall through perturbations in both the upper-tropospheric flow and regional low-level moisture availability. Upper-level divergence associated with the MJO tropical convection drives a quasi-stationary Rossby wave response to the midlatitudes. Read more “How MJO Teleconnections and ENSO Interferencce Impacts U.S. Precipitation”