Climate change 'causing extreme waves'

In a report released today, researchers from the CSIRO said they had found a link between climate change and extreme weather off the southern coast.

An analysis of available data shows significant increases in wave heights in the Southern Ocean over the past 45 years, particularly during the southern hemisphere autumn and winter months, the report said.

The frequency of large wave events has also increased.

"Extreme wave conditions are greatest south of the Australian continent, associated with the passage of extra-tropical storms along Australia's southern margin," the report said.

The researchers also discovered a connection between an increase in the power of waves in northern Australia and the length and strength of monsoon seasons.

"Variability of wave power in northern Australia is potentially related to variability in the length and strength of the monsoon season," the report said.

Federal Climate Change Minister Penny Wong said the research would improve understanding of how global warming might affect offshore waves and the potential impact on coastal zones.

"This study will help increase our understanding of the potential impacts to the coastal zone, as well as providing valuable information for those seeking to generate electricity from wave energy," Senator Wong said.

The report would also provide critical information for coastal zone managers to help them plan for the potential impacts of climate change, Senator Wong said.