The CSIRO projections are for an
INCREASE of 1.5 % (low global warming scenario) and 3.5 % (high warming scenario) in
rainfall in summer and
autumn; and for a DECREASE of 3 % (low global warming scenario) and 7.5 % (high global warming scenario) in winter and spring.
During that same period, average annual
rainfall in New South Wales declined by 3.6 inches (92 millimeters).3 Scientists think the decline in
autumn rainfall in southeast Australia since the late 1950s may be partly due to
increases in heat - trapping gases in Earth's atmosphere.3, 14 Major bushfires over southeast Australia are linked to the positive phase of an ocean cycle called the «Indian Ocean Dipole» — when sea surface temperatures are warmer than average in the western Indian Ocean, likely in response to global warming.15, 16