A three year meteorological cycle
In 1925 the Australian Commonwealth Bureau of Meteorology published a memoir by Edward Kidson (1925) who was at that time an assistant director i n the Bureau. Entitled "Some periods in Australia's weather", it contained a surprisingly thorough survey of the synoptic climatology of the Australian continent. In particular, it dwelt extensively with a three year period claimed to be exhibited by meteorological observations distributed throughout the world. Both Kidson (1925) and Braak (1924), who was a Dutch meteorologist working in Batavia, agreed that the afore-mentioned cycle resulted from "a natural period of readjustment, or action and reaction, in the Earth's atmosphere", a quite remarkable conclusion in the light of today's knowledge. The three year cycle was reported to be especially well shown by the mean sea level pressures at Darwin.