What the latest IPCC report says about Australia

Image source: CAWCR

Since the 1900s the world has warmed an average of 0.85 degrees and the sea has risen an average of 19 cm. So affirms the 2,216-page draft report of the Intergovernmental Panel on Climate Change (IPCC) released on 27 September 2013 (see separate FlagPost on the IPCC). The first instalment of the IPCC’s Fifth Assessment Report (AR5) presents the latest science on global climate change. But Australia has a unique climate, influenced by both Indian Ocean events and the highly variable El Niño Southern Oscillation (ENSO) phenomenon. What does the latest IPCC report say about Australia?

Australia's big wet: La Niña explained

Image source: BOM (photograph by John Terni)

The Bureau of Meteorology, the CSIRO, and the World Meteorological Organisation have each released a review of Australian and world climate in 2011. According to these three sources, 2011 in Australia was generally cooler than recent years...but warm for a La Niña year. It was also a wet year for Australia...but then, that’s normal for a La Niña year. So what is La Niña? How do we understand climate change and variability in the context of a La Niña event?