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read moreWhy is southwest Western Australia so dry?
William Atkins
Wednesday, 24 March 2010 02:25
Australian and Chinese scientists have come up with an answer to the question 'Why has southwest Western Australia experienced dramatic declines in rainfall since the 1970s?'
The SWACI shows that the root cause of the problem in southwest WA is from a weakening of the atmospheric circulation system over the Indian Ocean.
The March 23, 2010 CSIRO media release 'New climate index solves south-west WA rainfall' quotes Dr. Yun Li, one of the researchers in the study.
Dr. Li states, 'Using this new index we have found that the Southwest Australian Circulation is becoming weaker early in the winter wet season (May to July) causing the drier conditions observed in south-west WA.'
The CSIRO article goes on to state 'Since the mid-1970s south-west Western Australia has seen a 15-20 per cent decrease in average winter rainfall, from 323 mm in 1925-1976 to 276 mm from 1976-2003.'
The three authors of the study include CSIRO statistician Dr. Li, along with climate physicists Professor Jianping Li and Juan Feng, both from the Chinese Academy of Sciences.
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