However, because of the earth's rotation, there is second force, the Coriolis force that affects the direction of wind flow. pressure gradient increases) the speed of the wind also increases at that location. The speed of the wind is directly proportional to the pressure gradient meaning that as the change in pressure increases (i.e. Pressure gradient is just the difference in pressure between high- and low-pressure areas.

This change in air pressure is called the 'pressure gradient'. The closer the isobars are drawn together the quicker the air pressure changes. Isobars maybe be close together or far apart. The opposite is true for low-pressure systems in that with each concentric line toward the center represents lower pressure. With high-pressure systems, the value of air pressure along each isobar increases toward the center with each concentric line. So everywhere along each line is the pressure has the same value. 'Iso' means 'equal' and a 'bar' is a unit of pressure so an isobar means 'equal pressure'. Usually surrounding these 'highs' and 'lows' are lines called isobars. You have probably seen weather maps marked with H's and L's which indicate high- and low-pressure centers. Tsunami Preparedness and Mitigation: Individuals (You!).

Preparedness and Mitigation: Communities.

The Positive and Negative Side of Lightning.

The sinking city origin download