GEOS2111 Lecture Notes - Lecture 14: Synoptic Scale Meteorology, Atmospheric Railway, Wind Speed
2 Jul 2019
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Document Summary
Tropical cyclone definition: also known as hurricanes and typhoons in other parts of the world. Examine connections between climate change and tropical cyclone activity (frequency and severity) Spiral arms of clouds: include thunderstorms, lightning, etc. Updraft of air: from ocean eye spans around. Diameter: small cyclones: 250 300 km in diameter, large cyclones: 1,200 km. Air pressure: lowest in the eye, the ocean is able to bulge upwards in the eye, because there is not much pressure at the centre of the system (upwards by 6. 5m) Wind speed: wind speed is highest where closest to the eye, category 5 cyclone can have a wind speed of 350 km/hr. Temporally: cyclone season, southern hemisphere (australia): november april, northern hemisphere: may october, tropical cyclones have been recorded to occur. Pacific ocean tend to be too cold for tropical cyclones to form: tropical cyclones require warm surface water to develop. Hurricanes start off in africa: easterly wave = ripples in africa (ethiopia)
