The Moon's orbit is tilted by approximately five degrees
compared to the Earth-Sun plane. The net affect of this is
that the strength of Lunar-tides at a given latitude on the
Earth's surface vary in strength over a cycle of 18.6 years.
This 18.6 year Draconic cycle is also clearly evident in the
small changes that take place in the rate of rotation of the
The above graph clearly shows that Victoria experienced
increased annual precipitation around 1917, (1936), 1955,
1973-74, 1992, and 2010-11. These years are separated
by ~ 18.6 years and occur at times which correspond to
peaks in the strength of the Draconic tides.
Why is the Australian BOM ignoring this obvious piece
of evidence that connects the annual rainfall in Victoria to
long-term changes in the Lunar Tides?
Will they be ready for the next period of increased
precipitation around 2029?
Please refer to the following papers for a possible
explanation of this phenomenon:
Wilson, I.R.G., Lunar Tides and the Long-Term Variation
of the Peak Latitude Anomaly of the Summer Sub-Tropical
High Pressure Ridge over Eastern Australia
The Open Atmospheric Science Journal, 2012, 6, 49-60
Southern Hemisphere, The Open Atmospheric Science Journal,
2013, 7, 51-76