SIO 15 Lecture Notes - Lecture 16: High-Pressure Area, Coriolis Force, Wind Speed
19 Dec 2018
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Document Summary
Compression = warming, expansion = cooling in adiabatic processes. Adiabatic cooling: air moves from high to low air pressure. Adiabatic heating: air moves from low air pressure to high. Wind speed are high pressure gradients are steep, jet streams are high-altitude winds near the top of the troposphere. High pressure systems (anti-cyclone): surface air move away from center, ridge: elongated area of high pressure. Low pressure system: surface air moves toward low-pressure center, air rises adiabatically, expanding and cooling. Bad weather : trough: an elongated area of low pressure, cyclones: air rises at center, winds blow inward and counterclockwise in northern hemisphere (clockwise in southern) Coriolis effect: moving objects are deflected on a rotating earth. The spinning earth causes the coriolis effect. Coriolis effect deflects an object that"s moving from the equator northward eastward. Coriolis effect changes the path of moving objects in the northern hemisphere deflecting them to the right. Air pocket that rises adiabatically: cools and expands.
