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快乐十分投注:Southern Oscillation Index

浙江快乐12历史开奖 www.8gzji.cn The Southern Oscillation Index (SOI) is calculated from the monthly or seasonal fluctuations in the air pressure difference between Tahiti and Darwin.

A strongly and consistently positive SOI pattern (e.g. consistently above about +6 over a two month period) is related to a high probability of above the long-term average (median) rainfall for many areas of Australia, especially areas of eastern Australia (including northern Tasmania) - La Niña.

Conversely, a 'deep' and consistently negative SOI pattern (less than about minus 6 over a two month period, with little change over that period) is related to a high probability of below median rainfall for many areas of Australia at certain times of the year - El Niño.

However, it is important to remember that the pattern of relationship between SOI and rainfall (and temperature) can vary depending on the particular season and region. Additionally, the change in SOI over a specified period can be as important in understanding relationships between SOI and rainfall as is the absolute value in SOI.

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Queenslanders in state's far north urged to factor tropical cyclone threat into New Year's Day plans

20:52 EDT

The new year may bring a tropical cyclone to Far North Queensland, with locals encouraged to plan ahead for a the possibility of a destructive storm.

Mon Repos trial aims to boost turtle hatchling survival rates, combat heatwaves with 'artificial rain'

18:42 EDT

They are more commonly associated with parks and lawns, but sprinklers are now also lining a beach in south-east Queensland in a world-first trial to keep turtle nests cool and reduce heat-related deaths of the animals.

2018 likely to be Sydney's fifth hottest year on record

15:57 EDT

Using the combined running average maximum and minimum temperature, 2018 is expected to be Sydney's 5th hottest on record.

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