TPI
Tripole index (IPO)
SST anomaly box 2 (10°S–10°N, 170°E–90°W) minus the mean of box 1 (25–45°N, 140°E–145°W) and box 3 (50–15°S, 150°E–160°W), 30-day mean. — Henley et al. 2015, Clim. Dyn. 45, 3077–3090, doi:10.1007/s00382-015-2525-1
DATA THROUGH 2026-11-07 · UPDATED 2026-11-08 11:26 UTC
SST anomaly box 2 (10°S–10°N, 170°E–90°W) minus the mean of box 1 (25–45°N, 140°E–145°W) and box 3 (50–15°S, 150°E–160°W), 30-day mean. — Henley et al. 2015, Clim. Dyn. 45, 3077–3090, doi:10.1007/s00382-015-2525-1