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ATMOSPHERIC PRESSURE

Geography

The force exerted by gases in the atmosphere on some area or body on the earths surface. Measured using barometers of three types namely mercury, aneroid and Fortin Barometers

How It Works

 

Advantage

Quite accurate

Disadvantage

  1. Cumbersome to carry around.
  2. Can be damaged quite easily while being carried around.

 

Aneroid Barometer

-Measures changes in atmospheric pressure.

How It Works

 

Evaporation

The rate and amount of evaporation is measured using piche and tank evaporimeters.

Piche Evaporimeter

 

Tank Evaporimeter

How It Works

 

Cloud Cover

The amount of cloud cover is observed using eyes.

It’s given in oktas.

Okta=approximately 1/8 of sky is covered with clouds.

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