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Expanding Tropics Mean Less Rain Globally
According to a report by ABC News, the finding is a result of a review of over 70 scientific papers done by climate researchers Professor Steve Turton and Dr Joanne Isaacs of James Cook University in Cairns, who have documented the rapid advance of the tropical zone.
"The review suggests that the tropics have expanded over the last 25 to 30 years, between 2 and 5 degrees of latitude in both hemispheres," said Turton, who examined evidence from weather balloons, satellite imagery, sea surface temperatures and climate models.
"That's between 300 and 500 kilometres just in that short period of time," he added.
Turton said that given the impacts on everything from farming and healthcare to viticulture and tourism, much more research is needed to help respond to this change.
"The tropics have half the world's population, 80 percent of the world's biodiversity, very high infant mortality, high rates of tropical diseases and they make up around 20 percent of Gross World Product," he said.
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