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This study explores the impact of gravitational forces between the Earth and the Moon on tidal phenomena. It highlights the concept of the common center of gravity where both celestial bodies revolve, along with the intricate pathways of their respective centers. The analysis includes various tidal cycles: diurnal, semidiurnal, and mixed semidiurnal, along with the effects of Coriolis forces and amphidromic points. Observational data from locations like the Bay of Fundy is presented, alongside tidal forecasts and weather interactions that significantly influence tidal levels.
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GRAVITATION M G 1/R2
Gravitational force B A C • • • • • • Earth Moon
A little more reality Path of moon’s centre x Common centre of gravity Path of earth’s centre Both the earth and the moon revolve around their common centre of gravity
A little more reality 1 Common centre of gravity 4 x 2 3 Path of earth’s centre
A little more reality 1 Common centre of gravity 4 x 2 3 Path of earth’s centre
Different tide cycles Diurnal Tide
Different tide cycles Semidiurnal Tide
Different tide cycles Mixed Semidiurnal Tide
Tide Levels and Chart Datum Mhws - Mean High Water on the Spring tide Mhws - Mean Low Water on the Spring tide Mhws - Mean High Water on the Neaptide Mhws - Mean Low Water on the Neaptide Mtl - Mean Tide Level MHWS MHWN Neap Range Spring Range MTL MLWN MLWS Chart Datum
Tides and Weather Parlee Beach
Tides and Weather Saxby Gale - 1869