VPM1
MJO VPM1
Velocity-potential MJO index: RMM with OLR replaced by 200-hPa velocity potential (15°S–15°N, 4 harmonics and previous-120-day mean removed). Tracks the MJO better in boreal summer. — Ventrice et al. 2013 (MWR 141, 4197)
DATA THROUGH 2026-10-12 · UPDATED 2026-10-13 11:02 UTC
Velocity-potential MJO index: RMM with OLR replaced by 200-hPa velocity potential (15°S–15°N, 4 harmonics and previous-120-day mean removed). Tracks the MJO better in boreal summer. — Ventrice et al. 2013 (MWR 141, 4197)