EARTHSC 2GG3 Lecture Notes - Lecture 9: World Meteorological Organization, Northern Hemisphere, 6 Years
11 Sep 2018
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Document Summary
Rising warm moist air spirals upward around the eyewall; loses moisture as it rises. Upward rotation draws air from the eye, causing dry air to sink into the centre. Upward rotation also causes air to flow out the top of the storm. Critical for survival of the hurricane because it allows additional warm, moist air to converge inward at the lower level of the storm. Hurricane movement: movement is controlled by the coriolis effect and steering winds. In the northern hemisphere, hurricanes track westward in the trade winds across the atlantic ocean and curve to the right. In the north atlantic, hurricane tracks are influenced by the location and size of the. Bermuda high: a mature hurricane will move at a speed of 19 to 27 km/h, hurricanes dissipate as they move over land. Extratropical cyclones: necessary conditions for formation, strong temperature gradient in the air near the surface, strong winds in the upper troposphere.
