Not so long ago, the United Nation’s Intergovernmental Panel on Climate Change, IPCC, released a report about how it is now hotter, and that there is a 95% chance this has been caused by human activity.
This key finding was from just part 1 of a 3-part report. Part 2, is probably more relevant to those on the land as it will discuss “impacts” including how changes in temperature are likely to affect rainfall. Part 2 is not due for release until March 2014. 
But it is possible to get a sneak peek by reading some of the peer-reviewed papers that will contribute to the second report. According to one of these by a team from the Centre for Australian Weather and Climate Research, CAWCR, which is a partnership between the Bureau of Meteorology and CSIRO, there may be an overall 1.8% decline in rainfall in the Murray Darling Basin [1].
Jennifer Marohasy BSc PhD has worked in industry and government. She is currently researching a novel technique for long-range weather forecasting funded by the B. Macfie Family Foundation.