UW-Madison ATMOCN 100 - Tropical Cyclones (8 pages)

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Tropical Cyclones

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Tropical Cyclones


A lecture about tropical cyclones. It describes what we call them, the intensity of them, the parts, etc.

Lecture number:
Lecture Note
University of Wisconsin, Madison
Atmocn 100 - Weather and Climate
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Atm Ocn 100 Edition 1nd Lecture 30 Outline of Last Lecture I Reminders II Current Weather III El Nino Outline of Current Lecture II Reminders III Weather of the day IV Tropical Cyclone vs Midlatitude or Frontal Cyclone V Hurricane Tracks VI Parts and Weather of a Hurricane VII Wind and Storm Movement VIII Initiation of Tropical Cyclones IX Easterly Waves Current Lecture Reminders Homework Due Wednesday November 26 2014 TYU Ch 5 1 2 3 8 9 13 TYU Ch 23 1 2 3 4 5 6 7 8 10 13 19 TYPSS Ch 5 3 TYPSS Ch 23 none TYU Ch 24 1 5 7 9 10 14 18 19 22 23 25 TYPSS Ch 24 4 Plan Issue new homework set on Friday November 21 to be due Friday December 5 2014 Weather of the day The past few weeks Wisconsin has been in the purple and dark blue which is freezing But this weekend it looks like it will be a little warmer above freezing This weekend will be warmer but then it is supposed to get cold again next week Tropical Cyclones Chapter 24 Tropical cyclone forms over tropical Oceans Basic differences with mid latitude cyclone Tropical Cyclone Warm core Intensity increases downward strong surface winds Energy from warm ocean underlying relatively cool atmosphere Energy input by surface fluxes of latent and thermal heat that flow upward in deep precipitating eyewall clouds Midlatitude or Frontal Cyclone Cold core Intensity increases upward jet stream at upper reaches of cyclone Energy from north south temperature differences across a front Energy input by overturning air of contrasting densities i e warm light weight air rising over cold heavy weight air that is sliding underneath the warm air Main Differences between extratropical cyclones and tropical cyclones The extratropical cyclones have cold air in the middle whereas tropical cyclones have warm air in the middle The strongest winds are different between these two as well Extratropical cyclones have strongest winds high in the atmosphere And tropical cyclones tend to have the strongest winds low in the atmosphere Tropical cyclones are

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