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快乐十分钟技巧: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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Man dies in floodwaters north of Townsville

21:35 EDT

A 18-year-old man has died after being swept away in flood-affected waters north of Townsville.

Citizen scientists called on to map extent of drought killing native trees

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While rain has arrived in some drought-affected areas, it has been too late for many native trees.

Ex-Tropical Cyclone Owen dumps more than half a metre of rain in north Queensland

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Ex-Tropical Cyclone Owen has dumped "incredible" and "very intense" rain over parts of Queensland's north tropical coast, the Bureau of Meteorology (BOM) says.

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