Sea-Surface Temperature Anomalies: El Niño
OceansPhysical EnvironmentA composite of sea-surface temperature anomalies during El Niño from November to March during the following years: 1958, 1966, 1973, 1983, 1987, 1992, 1996, and 1998. When sea-surface temperatures in the tropical eastern Pacific rise well above normal, it is known as an El Niño event.
NOAASea-surface temperature anomalies during El Niño. The most intense warming (2 to 2.25 degrees Celsius, dark brown) occurs off the coast of South America. Cooler areas (negative 2.25 to negative 2 degrees Celsius, dark blue) are in the Arctic Ocean.
-0.25 to 0.25 | 0.75 to 1.0 | 1.0 to 1.25 | 1.25 to 1.5 | 1.5 to 1.75 | Less than 20°F | 20–29°F | 30–39°F | 40–49°F | 50–54°F | 55–59°F | Class | Rank | Kilotons per year | Class | Rank | Value | Black Butte Crater Lava Field | Black Rock Desert | Buzzard Creek | Carrizozo | Craters of the Moon | Diamond Craters | Dotsero | Fort Selkirk | Haleakala | Hell's Half Acre | Hualalai | Imuruk Lake | Ingakslugwat Hills | Jordan Craters | Kilauea | Markagunt Plateau | Mauna Kea | Mauna Loa | Nazko | Red Hill | San Francisco Volcanic Field | St. Michael | St. Paul Island | Uinkaret Field | Wapi Lava Field | Wells Gray-Clearwater | Yellowstone | Zuni-Bandera | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.311% | 1.20% | 0.159% | 0.444% | 2.10% | 69.8% | 31.1% | 23.3% | 22.8% | 21.0% | 7.07% | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||||||