La Niña is an ocean-atmosphere phenomenon that acts as counterpart to the El Niño. El Niño and La Niña are opposite phases of the broader climate pattern known as the El Niño-Southern Oscillation or ENSO. During La Niña, ocean surface temperatures over the equatorial Eastern Central Pacific Ocean are lesser than the normal temperature by three to five degree Celsius. La Niña is considered the positive phase of ENSO. It is associated with cooler surface temperatures that the average in the tropical Pacific Ocean in its eastern and central regions. It must be noted that every country and island nation has a specific threshold for what is a La Niña occurrence, and this is customised to their particular interests.