Sea-Surface Temperature Anomalies: La Niña
OceansPhysical EnvironmentA composite of sea-surface temperature anomalies during La Niña from November to March during the following years: 1955, 1956, 1965, 1971, 1974, 1976, 1989, and 1999. When sea-surface temperatures in the tropical eastern Pacific drop below normal, it is known as a La Niña event.
NOAASea-surface temperature: Negative 0.5 to negative 1.5 (purple): Central Pacific regions. Negative 0.25 to 0.25 (light purple) are in the Arctic and Atlantic Ocean. 0.25 to 2.25 (red) are mostly in the North Atlantic Ocean and South Pacific Ocean.
-1.75 to -1.5 | -1.5 to -1.25 | -1.25 to -1.0 | -1.0 to -0.75 | -0.5 to -0.25 | -0.25 to 0.25 | 0.5 to 0.75 | Class | Rank | Value | Tropical rain forest (Af) | Tropical monsoon (Am) | Tropical savanna (Aw) | Tropical, subtropical hot desert (BWh) | Midlatitude cold desert (BWk) | Tropical, subtropical hot steppe (BSh) | Midlatitude cold steppe (BSk) | Humid subtropical moist all year, hot summer (Cfa) | Marine West Coast (Cfb, Cfc) | Mediterranean (Csa, Csb) | Humid continental, hot summers (Dfa, Dwa, Dsa) | Humid continental, mild summers (Dfb, Dwb, Dsb) | Subarctic, cool summer (Dfc, Dwc, Dsc) | Tundra (ET) | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2.11% | 0.444% | 1.11% | 0.206% | 0.177% | 0.267% | 0.120% | 6.90% | 4.19% | 1.68% | 17.2% | 2.57% | 9.24% | 20.9% | 55.8% | 0.656% | 11.0% | 16.7% | 25.1% | 45.5% | 11.1% | ||||