Besides the fact that have strange stars and their toilets flush the wrong direction, Australian temperatures are out of phase with US temperatures. Australia cooled from 1880 to 1950, and has been warming ever since. The US pattern is basically opposite that.
Arctic and Antarctic sea ice move opposite each other
One of the causes of this is the eccentricity of the Earth’s orbit, which affects the length and intensity of seasons. Earth is currently closest to the Sun during January, which causes a short, intense summer in Australia, and a long, less intense summer in the US when the planet is furthest from the sun.
What other factors cause this phase relationship? Enquiring minds want to know.