The IPCC aims to understand the influences driving the Earth’s climate variability and future climate scenarios. It does not conduct its own research or run models; instead, it provides a meta-analysis of the work of thousands of researchers across the globe to provide a scientific basis for governments to develop climate-related policies. The IPCC warns of risks to food production and security, water availability, species extinction, biodiversity reduction, coastal erosion, floods and droughts, negative impacts on human health, and population displacement. ‘The IPCC has been saying the same thing since the 1990s, but no one is listening,’ said Dr Chloe Mackallah, reading directly from the IPCC’s Fifth Assessment Report, which states that the effects of anthropogenic greenhouse gas emissions ‘are extremely likely to have been the dominant cause of the observed warming since the mid-20th century.’
Current climate models cannot capture the persistence of drought and length of heatwaves, and they struggle to simulate future rainfall extremes, sometimes because they offer conflicting results, because climate prediction and greenhouse gas emission models are not just in the hands of climate scientists. They have to take the human population into account – demography, economics, technology, and our actions. The modelling of future carbon dioxide emissions provides multiple possible futures depending on these. Professor Andy Pitman asks “what do you want for your future? Which do you think we can achieve?”
Our climate is already changing. Under the Paris Agreement, Australia and the world’s great nations have committed to reducing global temperatures to a 1.5-2°C rise over pre-industrial levels. Should this exercise prove successful, a 2°C rise will still have far-reaching climate effects, with major implications for the State of Victoria. This panel of senior scientists were gathered together by the Governor of Victoria to showcase some of the work in climate adaptation produced in our state and, most importantly, share actions we could all take in our personal and professional lives to adapt to the “new normal.”
The official position of the Royal Society of Victoria is that, given the irrefutable scientific evidence for human activity driving climate change, it is vital that policies that curb greenhouse gas emissions from all sources be developed and implemented as a matter of urgency on a global basis. For Australia, this would mean the encouragement of the development of renewable sources of power, such as solar and wind generation with appropriate methods of storage, the improvement of energy efficiency, and to encourage the consumers of Australian coal (mostly Japan, Korea, India and China) to adopt similar policies.
The latest edition of the Proceedings of the Royal Society of Victoria is now online, featuring a new species of calcareous sponge discovered in Geelong, a spectacular new H5 meteorite in Maryborough, an account of Indigenous meteorological knowledge using stellar scintillation, a reclassification of fossil graptolites from the early Bendigonian, a case for regulated investment in a resilient electricity network, an account of the Bureau of Meteorology’s new extreme heatwave event forecasting service, and a discussion on whether a similar service might be required for cold extremes.