Assignment 5 ATOC

Assignment 5 ATOC - Assignment 5 Science of storms Islam...

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Assignment 5: Science of storms Jawad Islam ID: 260353581 1 ) Hurricanes are steered by the surrounding flow throughout the depth of the troposphere. Specifically, air flow around high pressure systems and toward low pressure areas influence hurricane tracks. In the tropical latitudes, tropical storms and hurricanes generally move westward with a slight tend toward the north, under the influence of the subtropical ridge, a high pressure system that usually extends east-west across the subtropics. South of the subtropical ridge, surface easterly winds (blowing from east to west) prevail. Pole ward (north) of the subtropical ridge, westerly winds prevail and generally steer tropical cyclones that reach northern latitudes toward the east. The westerlies also steer extra tropical cyclones with their cold and warm fronts from west to east. In the tropical North Atlantic and Northeast Pacific oceans, trade winds—another name for the westward-moving wind currents—steer tropical waves westward from the African coast and towards the Caribbean Sea, North America, and ultimately into the central Pacific ocean before the waves dampen out. These waves are the precursors to many tropical cyclones within this region. This acceleration causes cyclonic systems to turn towards the poles in the absence of strong steering currents. The poleward portion of a tropical cyclone contains easterly winds, and the Coriolis effect pulls them slightly more poleward. The westerly winds on the equator ward portion of the cyclone pull slightly towards the equator, but, because the Coriolis effect weakens toward the equator, the net drag on the cyclone is poleward. Thus, tropical cyclones in the Northern Hemisphere usually turn north, and tropical cyclones in the Southern Hemisphere usually turn south when no other effects counteract the Coriolis effect. Therefore given the known tracks of these hurricanes, in the North Atlantic hurricanes tend to move towards the east coast area of the North American continent but at the same time they turn to go northward as well, due to the Coriolis effect Therefore, when an east moving ocean vessel is directly in the path of a westward moving hurricane; the wisest course for the ship would be to veer to the south of the storm, as that way they would ride out the storm much more quickly, as the storm would be heading towards a north eastern direction and the ship would going in the opposite direction, if the ship did however went north of the storm however, it would be as if the storm was following the ship. 2)
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This note was uploaded on 10/17/2010 for the course ARTS ATOC 230 taught by Professor Henson during the Spring '10 term at McGill.

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Assignment 5 ATOC - Assignment 5 Science of storms Islam...

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