Predicting Weather By The Moon - Xavier University Libraries

Predicting Weather By The Moon - Xavier University Libraries Predicting Weather By The Moon - Xavier University Libraries

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Weather By The Moon the Moon’s pull on Earth, rather like two square dancers who grasp hands and swing each other in a circle.. This 18.613-year cycle is very important, and at the risk of boring the reader, I will explain it again. The Earth is tilted up already, by 23.5 degrees. An extra 5° is added or subtracted from the 23.5°, making 18° at the low end of the cycle and about 28° at the high end, about 9 years later. As you look at the diagrams overleaf it may become clearer. The Moon is pictured in two positions – the lower at 18.°(23.5-5), and the higher at 28.°(23.5 +5). MINIMUM DECLINATION MAXIMUM DECLINATION (from Harry Alcock) 120

The range of influence of the Moon due to gravitational pull on a slice of the atmosphere changes throughout the 18.613-Year Declination Cycle because at the high end the Moon is ranging over more of the earth every month than was the case at the low end of the cycle. Fortnightly changing hemispheres, the Moon ranges over a fairly narrow band of the Earth’s surface between the Tropics at the 18° end. But it ranges so widely at the 28° end, now out- tic tor tor 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 eclip- Equa- Moon 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 Equa- ecliptic Moon 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 123456789012345678901234567 Declination Minimum Declination Maximum Declination about 9 years later. 121 23deg 23deg 5deg 5deg 18deg 28deg

<strong>The</strong> range of influence of the <strong>Moon</strong> due to gravitational<br />

pull on a slice of the atmosphere changes throughout<br />

the 18.613-Year Declination Cycle because at the high<br />

end the <strong>Moon</strong> is ranging over more of the earth every month<br />

than was the case at the low end of the cycle. Fortnightly<br />

changing hemispheres, the <strong>Moon</strong> ranges over a fairly narrow<br />

band of the Earth’s surface between the Tropics at the<br />

18° end. But it ranges so widely at the 28° end, now out-<br />

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tor<br />

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eclip-<br />

Equa-<br />

<strong>Moon</strong><br />

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Equa-<br />

ecliptic<br />

<strong>Moon</strong><br />

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Declination<br />

Minimum Declination<br />

Maximum Declination about 9<br />

years later.<br />

121<br />

23deg<br />

23deg<br />

5deg<br />

5deg<br />

18deg<br />

28deg

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