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Atmospheric pressure
 

1º de ESO Geography and History


Climate Unit THE CLIMATE-Index

WEATHER and CLIMATE

THE ATMOSPHERE

ELEMENTS OF CLIMATE

CLIMATE FACTORS

CLIMATES OF THE WORLD

CLIMATE REPRESENTATION

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Glossary GLOSSARY

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Geography Unit THE EARTH PLANET

Relief Unit RELIEF

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Atmospheric pressure
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It is the force that is caused by the weight of the air column above the surface. 

Anticyclone

When the air exerts a greater force than the average weight of air on Earth, this is called anticyclone.  Having an excess of air, it should be released.  The air goes from the upper part Atmospheric pressure is measured with the barometer.  It is expressed in millibars. , creating stable weather

Barometer
Barometer Enlarge image

Cyclone

When the weight of the air is less, it produces what is referred to as a cyclone, depression or area of low pressure.  Since it has less air, it receives the excess air from the anticyclones.  It enters underneath and rises to fill the upper layers, producing instable weather.

Representation

Through lines that join points of equal pressure, called isobars.

Measurement

Atmospheric pressure is measured with the barometer.  It is expressed in millibars.

Isobars
Isobars Enlarge image
Areas of high or low pressure
Areas of high or low pressure Enlarge image
High pressure Ampliar imagen
Low pressure Ampliar imagen

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© Guillermo Méndez Zapata, profesor del IES Juan de la Cierva de Vélez-Málaga
Licenciado por la Universidad de Málaga (España)
   guillermomendezapata@hotmail.com

Jorge Juan Lozano Cámara, profesor del IES Juan de la Cierva de Vélez-Málaga
Licenciado por la Universidad de Granada (España)
   claseshistoria@hotmail.com


Ana María Marcos Sánchez, profesora del IES Juan de la Cierva de Vélez-Málaga
Licenciada por la Universidad de Málaga (España)

Kerry Elyse Hart, Licenciada por la Universidad de Richmond (Virginia, USA)

 

 
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