Many thanks to Jane Sultana for raising awareness of the sixth bienniel State of our Climate report developed by the CSIRO and the Bureau of Meteorology. From this link you can see a short 2-minute video of key findings and also download the full report.
Here are the key observations:
- The warming trend outlined in the previous State of the Climate reports is continuing.
- Australia’s climate has warmed on average by 1.44 (± 0.24) degrees since 1910, leading to an increase in the frequency of extreme heat events.
- Oceans around Australia are acidifying, and have warmed by around one degree since 1910, contributing to longer and more frequent marine heatwaves.
- The rate of sea-level rise varies around Australia’s coastlines, but overall, sea levels are rising in line with global trends.
- There has been an increase in extreme fire weather, and the length of the fire season, across large parts of the country since the 1950s, especially in southern Australia.
- Rainfall has increased across parts of northern Australia since the 1970s.
- Fewer tropical cyclones for the future, but a greater proportion projected to be of high intensity, with large variations from year to year.
- Global carbon dioxide (CO 2 ) concentrations in the atmosphere reached 410 parts per million (ppm) in 2019 and the CO 2 -equivalent of all greenhouse gas reached 508 ppm. The rate of CO 2 accumulation in the atmosphere has increased with every passing decade since atmospheric measurements began.
- Emissions from fossil fuels are the main contributor to the observed growth in atmospheric CO2. Around 85 per cent of global CO 2 emissions in the decade from 2009 to 2018 were from fossil fuel sources.