1/ MJO phase days (all amplitude) in DJF, during cooler ENSO conditions (ONI < 0), by QBO phase since 1974-75. +QBO group sees phase 6-7 spike while -QBO is more evenly distributed (note the phase 3-5 area, which will become more interesting in higher amp). pic.twitter.com/zvvf4FJIN7

— Anthony Masiello (@antmasiello) October 9, 2021