Point out the difference between land breeze and sea breeze. Explain how land breeze and sea breeze occur. OBJECTIVES At the end of the lesson, the learners will be able to: 1. 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. A Detailed Lesson Plan In Science for Grade 7 Students Prepared by: Kristine Ann L. The theory of density currents was developed by T. It arises at sunset when the sea surface is warmer than the adjacent land due to the land having a lower heat capacity and cooling off faster. 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. What are land breezes and why do they occur A land breeze is a local nighttime and early morning wind that occurs along coasts and blows offshore (from the land out to sea). 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. Sea/land breezes: The differential heating of water and land generates daytime sea breezes (onshore flows of air) and land breezes (offshore flows of air). Where a temperature gradient exists, a pressure gradient is present also where the temperatures are uniform, no pressure gradient is found. The distance of penetration inland presents differences of 50-60 between summer and winter months. Then, by heating some air near the surface, a zone of temperature gradient near the surface forms separating warm air from cold air. However, during the 50 of the summer days there is a well developed sea-land breeze, these circulations begin two or three hours after sunrise in this months with wind speed of 4-5 m/s and wind directions almost perpendicular to he coast. Imagine an initially uniform temperature and pressure distribution. Our product offerings include millions of PowerPoint templates, diagrams, animated 3D characters and more.The front is a consequence of the response of the flow to heating. is brought to you by CrystalGraphics, the award-winning developer and market-leading publisher of rich-media enhancement products for presentations. Then you can share it with your target audience as well as ’s millions of monthly visitors. We’ll convert it to an HTML5 slideshow that includes all the media types you’ve already added: audio, video, music, pictures, animations and transition effects. You might even have a presentation you’d like to share with others. And, best of all, it is completely free and easy to use. Whatever your area of interest, here you’ll be able to find and view presentations you’ll love and possibly download. It has millions of presentations already uploaded and available with 1,000s more being uploaded by its users every day. is a leading presentation sharing website. TRAVEL FROM WEST TO EAST LASTING FROM A FEW DAYS LARGE CENTERS OF LOW PRESSURE THAT GENERALLY.PRIMARY WEATHER PRODUCERS IN MID- LATITUDES 30.BOUNDARIES THAT SEPARATE AIR MASSES OF DIFFERENT.THE AREA WHERE AN AIR MASS ACQUIRES ITS.A LARGE BODY OF AIR THAT IS CHARACTERIZED BY THE.WET MONSOON OCCURS IN SUMMER WITH LOW PRESSURE.DRY MONSOON OCCURS IN WINTER WITH LOW PRESSURE.WARM AND DRY MOUNTAIN WIND BRINGING RAPID.CAN CAUSE EXTREMELY COLD TEMPERATURES IN A.OCCURS AS LOW PRESSURE AREA DEVELOPS OVER LANDĭURING HEAT OF DAY.The direction of wind flow at the surface in a sea. Land breezes alternate with sea breezes along coastlines adjacent. WATER AT NIGHT DUE TO SPECIFIC HEAT DIFFERENCES. A sea breeze is a mesoscale circulation produced by heating differences between the land and water. land breeze, a local wind system characterized by a flow from land to water late at night. OCCURS AS A LOW PRESSURE SYSTEM DEVELOPS OVER.
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