October 31, 2020

Air masses and fronts

Air masses are large areas of air which have the same characteristics throughout. They may be warm or cold, depending upon where they originated, ie tropical or polar. They are further classified as either continental or maritime. When two different air masses meet they form a boundary which is known […]
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October 31, 2020

Frontal depression

Life Cycle of a frontal depression. Warm air moves faster than cold and every now and again, it forces its way into the cold air, making a bulge in the polar front. This is the commencement of a frontal depression, since as the warm, less dense air pushes into the […]
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October 31, 2020

Tropical storms

Nature. Tropical storms are violent storms with very strong winds and heavy seas. Origin. They occur mostly in the late summer and early autumn (December to April in the southern hemisphere). They originate in the tropics between latitude 5° and latitude 10° north or south and develop only over the […]
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October 31, 2020

Ocean currents

Types of current. Unlike tidal currents, ocean currents are not dependent on gravitational effect produced by the interaction of sun and moon. They are caused by the differences in level, or in salinity/density, or in temperature between various masses of water, in which case they are called stream currents, or […]
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