Australia declared that a La Nina weather phenomenon had developed in Pacific Ocean for the second consecutive year.
La Nina is an oceanic and atmospheric phenomenon.
During La Nina period, sea surface temperature across eastern equatorial part of central Pacific Ocean becomes lower than normal by 3–5 °C.
Phenomenon of La Nina is usually associated with more tropical cyclones, greater rainfall, and cooler than average temperatures in equatorial Pacific Ocean.
It is a colder counterpart of El Nino.
It is a part of broader El Nino–Southern Oscillation (ENSO) climate pattern.