Jet Stream

When watching the evening weather report, chances are good that you will hear something about the jet stream. This speedy current is commonly thousands of kilometers long, a few hundred kilometers wide, and only a few kilometers thick. Jet streams are usually found somewhere between 10 to 14 km above the earth's surface in the troposphere. They blow across a continent at speeds of 240 km per hour, usually from west to east, but can dip northward and southward depending on atmospheric conditions.

The jet stream is a long, narrow current of fast-moving air found in the upper levels of the atmosphere.

Air temperature differences cause jet streams. The bigger the temperature differences, the stronger the pressure differences between warm and cold air. Stronger pressure differences create stronger winds. This is why jet streams fluctuate so much in speed.

During the winter months, polar and equatorial air masses form a sharp temperature contrast, causing an intense jet stream. Stronger jet streams push farther south in the winter. However, during summer months, when the surface temperature changes are less, the jet stream winds are weaker. The jet stream blows farther north.

Airline companies like the jet stream since it helps to push aircraft along. It's like walking with the wind instead of against it. Going with the flow is easier.

Survival Basics

Survival Basics

This is common knowledge that disaster is everywhere. Its in the streets, its inside your campuses, and it can even be found inside your home. The question is not whether we are safe because no one is really THAT secure anymore but whether we can do something to lessen the odds of ever becoming a victim.

Get My Free Ebook

Post a comment