Global warming

Global warming is causing climate change which is predicted by the CSIRO to have significant effects on the climate of and extreme weather events in Australia. It is predicted that the Great Barrier Reef and reefs surrounding Lord Howe Island could be killed as a result of the rise in water temperature forecast by the IPCC Fourth Assessment Report. The Murray River, Darling River Coorong and Macquarie Marshes are all at risk from decreased rainfall from climate change.

Coastal communities face risks from sea level rise, albeit over a long period of time based on current estimates of the IPCC Fourth Assessment Report. The Gold Coast, being built on sand and with many canal developments, could be considered particularly at risk. Suburbs of Sydney like Drummoyne and Concord on rivers like the Parramatta River face risks of inundation of low lying areas such as parks (such as Timbrell Park and Majors Bay Reserve) reclaimed from mudflats at the heads of bays, or massive expenses in rebuilding seawalls to higher levels.

Currently, there are several environmental movements and campaigners advocating for action on climate change. One such campaign is “The Big Switch”, Australia’s largest community climate change campaign.

New projections for Australia’s changing climate includes:

• droughts are likely to become more frequent, particularly in the south-west
• evaporation rates are likely to increase, particularly in the north and east
• high-fire-danger weather is likely to increase in the south-east
• sea levels will continue to rise