OCEAN HEALTH
Sea-Surface Temperature Anomaly (SSTA)
Departure of sea-surface temperature from normal. Sustained positive anomalies drive bleaching, range shifts, and mass-mortality events.
Threshold Bands
| Band | Range | State |
|---|---|---|
| Normal | < +0.5 | OK |
| Warm | +0.5 to +1.5 | WARN |
| Marine heatwave | > +1.5 | CRIT |
Formula
Observed SST minus climatological mean for the cell and date.