Ridgy is one of the major drivers that shapes southern Australia’s weather. This is Ridgy or, as scientists like to call him, the Sub-tropical Ridge. So Enso is definitely an important dog to keep your eye on. Climatologists closely follow Enso’s behaviour, looking at ocean temperatures, the SOI, and cloud and wind patterns to work out where it might chase that moisture next. Up north, El Niño can bring a later start to the wet season rains, with typically fewer tropical cyclones and floods.Įnso often teams up with the other climatedogs to affect our seasonal rainfall. El Niño years have often resulted in a drier winter and spring for eastern Australia, as well as an increased chance of frost and heatwave events. And in northern Australia, the first rains of the wet season tend to be earlier during La Niña years, along with an increased chance of floods and tropical cyclones.ĭuring El Niño, Enso changes its mind and drives warm moist air away from Australia and towards South America instead. Many La Niña years have seen higher winter and spring rainfall across large parts of Australia. But Enso’s behaviour can vary from year to year.ĭuring La Niña, Enso chases greater amounts of moist tropical air across Australia. This moist tropical air is a big source of rain across many parts of Australia. In a normal, or neutral, year, the Pacific Ocean trade winds blow from east to west, pushing moist air towards Australia. The El Niño Southern Oscillation, or Enso, has a big influence on Australia’s climate and seasonal variability.
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