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Southern Oscillation Index and transmission of the Barmah Forest virus infection in Queensland, Australia
  1. Peng Bia,
  2. Shilu Tongb,
  3. Ken Donalda,
  4. Kevin Partonc,
  5. Jack Hobbsd
  1. aDepartment of Social and Preventive Medicine, the University of Queensland, Brisbane, Australia, bSchool of Public Health, Queensland University of Technology, Brisbane, Australia, cDepartment of Agricultural Economics and Business, University of Guelph, Canada, dSchool of Human and Environmental Studies, the University of New England, Armidale, Australia
  1. Dr S Tong

https://doi.org/10.1136/jech.54.1.69

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    El Niño-Southern Oscillation (ENSO) events are usually accompanied by changes in the trade winds, cloud amounts and rainfall over the tropical Pacific and Australian regions, and seem to be related to many climatic anomalies around the globe. A measure of ENSO is the Southern Oscillation Index (SOI), which is the normalised atmospheric pressure difference between Tahiti in the south Pacific and Darwin in northern Australia. The SOI is closely related to variations in temperature and rainfall across the Pacific and in eastern Australia.1 A positive index (low pressure at Darwin, greater rainfall, higher sea levels) means that the south eastern trade winds feed moisture across the Pacific towards the Australian region. Hence positive SOI …

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    • Conflicts of interest: none.