Ocean tides

Approximately 10% of U.S. electrical energy is produced by hydroelectric dams.6 Although there are few economic and environmentally acceptable dam sites remaining, in some places it is possible to use wind power, or perhaps even the ocean tides, to generate electricity. Here the opportunity for chemists and chemical engineers is the invention and production of modern materials that can make such approaches possible. 

The moons gravitational pull on our planet is uneven. The side of Earth closest to the moon experiences the greatest pull, and the side farthest away experiences the weakest pull. The result of this uneven pull is a subtle, planetwide elongation of our oceans. As the Earth spins underneath this elongation, Earthbound observers notice a perpetual rise and fell of sea level. These are our ocean tides, and they can be harnessed for energy. 

This motion generates energy. Attempts are being made to harness the energy of the waves and ocean tides. Tidal energy is an alternative source of clean energy. 

The phases of the moon and the cycle of ocean tides are both periodic events, that is, they repeat in a regular manner. 

Matsumoto, K. Takanezawa, T. Ooe, M. (2000). Ocean Tide Models Developed by Assimilating TOPEX/POSEIDON Altimeter Data into Elydrodynamical Model A Global Model and a Regional Around Japan, Journal of Oceanography, Vol. 56, pp. 567-581. 

Tidal Power - The power available from the rise and fall of ocean tides. A tidal power plant works on the principal of a dam or barrage that captures water in a basin at the peak of a tidal flow, then directs the water through a hydroelectric turbine as the tide ebbs. 

The ocean tides are caused by the gravitational forces between the Earth, the Sun, and the Moon, along with the centrifugal force imposed by the Earth s rotation. As the Earth rotates, and as the three bodies move relative to one another, the gradual and recurring shifts in the balance of gravitational forces cause the water in the oceans to tend to move toward one coast or the other. 

Tidal forces exerted by the attraction of the moon and the sun (and to a minor extent by the planets) on the earth s body produce a wide spectrum of geodynamic phenomena, from primary luni-solar attractional effects to secondary induced effects like solid earth and ocean tides, and third order ocean loading effects. Since these phenomena affect precise geodetic observations and make them time-dependent it is necessary to reduce time-variable geodetic observables and derived quantities in order to correspond to a quasinstationary, time—invariant state. 

Platzman, G.W. (1968). The Rossby wave. Quart. Journal Meteorological Society 94 225-248. Platzman, G.W. (1970). Ocean tides and related waves. Lectures in Applied Math. 14 239-291. Platzman, G.W. (1972). Two-dimensional free oscillations in natural hasias. Journal of Physical Oceanography 2 2) 117-138. 

Large amounts of smoke from oil slick burning can result in oil rain. The formation and possible sinking of extremely viscous and dense residues can damage the sea bed and its inhabitants. The viscous residue may also be transported to shorelines and beaches by ocean tides or currents. Airborne irritants and possibility of secondary fire are sources of concern when combustion has to be carried out close to residential areas. Carbon monoxide, sulfur dioxide, and polycyclic aromatic hydrocarbons (PAH) are common toxic compounds emitted while burning oil on water. 

K. Honda, T. Terada, Y. Yoshida and D. Isitani, An investigation on the secondary undulations of oceanic tides, J. College Sci., Imper. Univ. Tokyo (1908), 108 pp. 

Noise-based seismic velocity monitoring is thus a unique method that allows to precisely monitor volcanic activity. It must however be mentioned that other phenomena perturb seismic velocities of the rock mass such as the presence of water in the medium, temperature and barometric atmospheric pressure changes, and solid and oceanic tides. It is thus important... 

Salellite orbit determination > Oceanography (altimetry) - Ocean tide studies... 

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