Australia has experienced two wet springs in a row. Now the weather bureau is saying another one is likely.
Dean Lewins
A final declaration can't be made until October or November at the earliest. But if confirmed, 2022 would see the fourth instance of three consecutive La Niña events since records began in 1900.The Bureau of Meteorology's "La Niña Alert" means there's a 70 per cent chance of the event occurring during the spring - as has happened each time the alert has been raised in the past.
"A negative IOD, marked by warming northwest of Australia and over Indonesia, can enhance La Niña development through strengthening the Pacific trade winds that support a La Niña," said Dr Agus Santoso, a senior research associate at the University of NSW's Climate Change Research Centre. "Exactly why they don't terminate ... is something we are still doing scientific research on. This is, I suppose, not inconsistent with what we've seen in the historical past, and we've seen what I call a triple dip La Niña event on several occasions," Dr McGregor said.Would it bring a heightened flood risk?
"As many Australians in the east know, the soils are still quite wet, the rivers are running quite high, and the dams are full, and with this outlook of increased rainfall, it does bring elevated flood risks for much of eastern Australia," he said.
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