The Tropical Western Hemisphere Warm Pool

摘要: The Western Hemisphere warm pool (WHWP) of water warmer than 28.5°C extends from the eastern North Pacific to Gulf Mexico and Caribbean, at its peak, overlaps with tropical Atlantic. It has a large seasonal cycle interannual fluctuations area intensity are significant. Surface heat fluxes WHWP through boreal spring an annual maximum SST areal extent in late summer/early fall, associated Atlantic hurricane activities rainfall northern South America southern tier United States. anomalies occur high temperatures where small changes can have impact on convection. Observations suggest that positive ocean-atmosphere feedback operating longwave radiation cloudiness is responsible for anomalies. Associated increase decrease atmospheric sea level pressure anomalous convection cloudiness. convective activity results less loss surface, which then reinforces