MJO modulation of surface variables over South America in the CFS reanalysis
Over South America in both seasons the results tend to blend into two different states each made up of three consecutive phases of the MJO with one transition phase in between. In other words, phases 8, 1, and 2 tend to show similar patterns in temperature and precipitation responses while phases 4, 5, and 6 show similar patterns, but opposite to those of phases 8, 1, and 2. Finally, phases 3 and 7 appear to be transition phases, showing intermediate results with weaker signals over. The same transition patterns are seen to an extent in both seasons and for both variables. Additionally, the data for November-March corresponds well to a strong response in the South American summer monsoon. Potential causes of these anomalies are also speculated by looking at deviations in zonal wind, velocity potential, and stream function for each of the eight phases.