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Climate Change trends

In a detailed examination of climate change trends, Darren Ray from the Bureau of Meteorology highlights rising greenhouse gas levels since the 1960s, with significant measurements initiated by Charles Keeling in Hawaii. Australia's monitoring, particularly at Cape Grim since the 1970s, showcases some of the cleanest air globally. Key findings indicate evident temperature rises and intensified rainfall predictions in wet areas, alongside notable changes in land use and forestry policies. Projections for South Australia reveal a drying trend and decreasing wet days, emphasizing the urgency of climate action.

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Climate Change trends

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Presentation Transcript

  1. Climate Change trends Acknowledgement: Darren Ray, Senior Meteorologist Climate Services Bureau of Meteorology, SA Regional Office

  2. Greenhouse gas levels are rising… In the 1960’s Charles Keeling started measurements in Hawaii… Australian version run by the Bureau of Meteorology at Cape Grim (northwest Tasmania) since the 1970’s (measuring the cleanest air in the world!!) as part of a global program.

  3. Forestry and land use change can be highly variable depending on the land clearing policies

  4. Global - temperature rises are clear… Source: http://www.bom.gov.au/cgi-bin/climate/change/global/timeseries.cgi

  5. Global - rainfall trend … (predictions are for wet areas to get wetter) Source: http://www.bom.gov.au/cgi-bin/climate/change/global/timeseries.cgi

  6. Australia – temperature trend … Source: http://www.bom.gov.au/cgi-bin/climate/change/global/timeseries.cgi

  7. South Australia – temperature trend … Source: http://www.bom.gov.au/ > Climate > Climate Change > Time series graphs

  8. Cape Borda, KI – temperature trend … Source: http://www.bom.gov.au/ > Climate > Climate Change > Climate Change > High-quality climate site networks

  9. Spatial warming trend (past 50 years) … Source: http://www.bom.gov.au/ > Climate > Climate Change > Trend maps

  10. Drying trend southern & eastern Australia (past 40 years) Source: http://www.bom.gov.au/ > Climate > Climate Change > Trend maps

  11. Decreasing number of wet days across southern SA … Source: http://www.bom.gov.au/ > Climate > Climate Change > Australian climate extremes - Trend maps

  12. Summer 1950 to 2007 trends… Autumn http://www.new.dpi.vic.gov.au/agriculture/climate/understanding-weather-and-climate/climatedogs/enso/ Increased Summer and Spring rainfall - possibly from burning off in Indonesia Decreased Autumn /early Winter rainfall… particularly in Murray Darling catchment area Winter Spring

  13. Further slides needed to discuss…. • Details of projections relevant to SA / KI • Details of climate change science & modelling

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