| 1 | La Nina and its opposite El Nino ocean-atmosphere phenomenon have strong influences on global temperatures. | |
| 2 | The El Nino phenomenon returned last year, so we expected the higher temperatures this year. | |
| 3 | Much depends on how much the El Nino deepens in the next few months. | |
| 4 | An El Nino event occurs when water temperature in the eastern part of the Pacific Ocean rises abnormally. | |
| 5 | La Nina reduces the sea surface temperature by around 0.5 degrees Celsius while El Nino has the opposite effect. |