Tropical Forcing Diagnostics · Low Frequency Forcing companion

Subseasonal Forcing

500 mb Height Correlation with Tropical 200 mb Velocity Potential (VP200)

Lag-regression maps by lead time, calendar month, and source region of tropical convection (NCEP/NCAR Reanalysis 1, 1979-2025).

regression map
Left/Right arrow keys step through lead time. Play auto-cycles Day 0-4 → 5-9 → 10-14 → 15-19 → 20-24.

Map Key

Reading the chart

Signal processing

Scope & design notes