TC Climatology

Best-track statistics from IBTrACS v04 and an interactive reanalysis globe with TC tracks. Composite, correlate, and contextualize across basins and decades.

ERA5 Reanalysis Globe

Compose by 14 climate indices (RONI, ONI, TNI, AMO, NPGO, SAM, IOD…) or any custom year × month set. Per-pixel correlation maps. 13,500+ IBTrACS tracks overlaid.

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Or jump straight into a TC-relevant scene — click any tile to open the globe pre-loaded.

JAS monsoon precipitation
Total precipitation in August. The W. African + Indian summer monsoons — seedbed for African Easterly Waves that grow into Atlantic TCs.
El Niño SST anomaly · Sep
Composite of years where RONI ≥ +1.0 in September — the warm Pacific tongue + cool W. Atlantic pattern that suppresses Atlantic TC activity.
Walker circulation · χ at 200 hPa
Velocity potential climatology at upper levels. Tropical large-scale rising/sinking branches that ENSO modulates — collapsed Walker → enhanced Atlantic shear.
Maximum potential intensity · Sep
Bister–Emanuel MPI from ERA5 at the Atlantic peak. Theoretical upper bound on TC wind speed given the local SST + atmospheric profile (computed via Gilford's tcpyPI).
SST × Atlantic ACE — June
Pre-season SST as an Atlantic-ACE predictor. Land on June SST, then open Index Correlation in the sidebar and choose ACE — N. Atlantic to compute the per-pixel r-map.
Deep-layer shear · July
|⟨V₂₀₀⟩ − ⟨V₈₅₀⟩| from monthly-mean winds. The shear corridor over the Atlantic that limits MDR genesis and reorganizes mature TCs.