Lecture 33 Outline of Last Lecture I. Weather of the dayII. Some ReviewIII. Hurricane StructureOutline of Current Lecture II. Review about Difference between Extratropical Cyclones and Tropical CyclonesCurrent LectureIn tropical cyclones the air rises clockwise.Energy source for extratropical cyclones is cold air next to warm air…An extratropical cyclone configuration is that there would be low pressure in the middle with cold air on either side. The relatively warm air would be trapped in the middle. In a tropical cyclone the core is warm. It will produce strong winds at the surface because the convergence of the circulation is focused at the surface where they are being drawn together to rise. Extratropical cyclone derives its energy from the thermal contrast. An extratropical cyclone is allowing the cold air that is propped up, that is kept in equilibrium of earth, to advance to the south and the warm air to slide over the top of it and advance to the north. And release energy that is built by that cold air sitting there. The relationship of cold air and warm air next to each other, the energy is there but it can’t be released. It is being propped up by the coriolis or spinning of the earth. To spin the earth it holds the cold air there. But it can still advance southward on a finer scale. Atm Ocn 100 1nd
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