How well do we actually understand climate? Is climate data indicative of climate change or are we dealing rather with climate variability? To clarify that question, we will review an example of climate data – the summer mean temperature anomaly for Australia. Then will follow a brief theoretical analysis of climate risk and decision-making. We will finish with a practical analysis of climate influences and the climate system. Climate data claims The Bureau of Meteorology (BOM) website includes a section on climate data. The adjoining figure shows a summer mean temperature anomaly analysis for Australia from 1910-11 to 2018-19. The…