forecast2011.pdf
to El Niño and La Niña relate only to sea-surface-temperature anomalies in the tropical Pacific Niño3.4 region (120°–170°W, 5°N–5°S). Our references to El Niño, neutral and La Niña conditions generally correspond to sea-surface-temperature (SST) anomalies >0.5°C, between -0.5 and +0.5°C, and <-0.5