EESA09H3 Lecture : EESA09 Lec 3 Slides
9 Oct 2011
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Document Summary
Term used in australia and in the indian. Storm (tropical region) with sustained winds of 18 ms-1 to 33 ms-1. Tropical storm with sustained winds ranging from. Tropical storm with sustained winds exceeding 50 ms-1. Robert simpson, director, national hurricane centre (usa) 119-153 km/h (33 42. 5 m/s), > 980 mb. 154-177 km/h (42. 5 - 49 m/s), 965 979 mb. 178-209 km/h (49 58 m/s), 945 964 mb. 210-249 km/h (58 69 m/s), 920 944 mb. Greater than 249 km/h (> 69 m/s), < 920 mb. Tropical storms fueled by sea surface temperatures and latent heat release. 26. 5 oc threshold is necessary but not sufficient. Wind generates waves, increasing spray, increasing evaporation and latent heat -fuel for the storm. Begins as a tropical wave (originates in east africa) in the intertropical convergence zone (itcz) Group of thunderstorms that become organized and self-sustaining. Requirements for the formation of tropical cyclone. Rising air releases latent heat, warms upper atmosphere, causes air to diverge.
