Making simplifying assumptions and applying the principles of conservation of energy and momentum, he found that the speed of a density current should depend only on the density (or temperature) difference and the depth of the two fluids. The theory of density currents was developed by T. Seabreeze (sea - morze, breeze - bryza, wiatr, z ang. Behind the head is a region of turbulent mixing between the warm and cold air.ĭensity currents are found in all sorts of circumstances: oil spills and airborne powder avalanches are also density currents. Density currents have a sharp leading edge, called a "head", where the air ascends rapidly. Most sharp atmospheric fronts, including land breezes, sea breezes, and coastal fronts, are density currents. Near the warm edge of the temperature gradient there is convergence, causing the temperature gradient to increase on the cold side there is divergence, and the temperature gradient weakens. The air that feels this pressure force accelerates, driving a wind blowing from cold to warm air. Where a temperature gradient exists, a pressure gradient is present also where the temperatures are uniform, no pressure gradient is found. Briere, S., 1987: Energetics of daytime sea breeze circulation as de. Then, by heating some air near the surface, a zone of temperature gradient near the surface forms separating warm air from cold air. breeze system, and has a notable effect on the sea-breeze pattern. Imagine an initially uniform temperature and pressure distribution. For ocean swimmers, the onshore wind chops up the water surface making swimming lumpy, bumpy and all-around not good learn how to combat this. The front is a consequence of the response of the flow to heating. A sea breeze describes a localised onshore wind that blows from the ocean inland towards the shore, and on long sunny days, it’s likely to occur during the morning.
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