Meteorological Instruments

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Presentation transcript:

Meteorological Instruments

Barometer

Barometer Used to determine atmospheric pressure Two Types Aneroid Barometer - Expansion or contraction of the vacuum chamber, caused by a change in air pressure, forces the pointer to move. Mercurial Barometer – It uses a long glass tube, open at one end and closed at the other. Air pressure is measured by observing the height of the column of mercury in the tube.

Thermometer is a device that measures temperature or temperature gradient using a variety of different principles

Hygrometer or Psychrometer Hygrometers are instruments used for measuring relative humidity. A simple form of a hygrometer is specifically known as a "psychrometer" and consists of two thermometers . Relative humidity is a term used to describe the amount of water vapor that exists in a gaseous mixture of air and water.

Anemometer anemometer is a device for measuring wind speed, and is one instrument used in a weather station.

Wind Vane A weather vane, also called a wind vane, is a movable device attached to an elevated object such as a roof for showing the direction of the wind. Very often these are in the shape of cockerels and are called weather cocks. Arrows are also popular, but a multitude of designs have been used.

Prop Anemometer Helicoid propeller anemometer incorporating a wind vane for orientation.

Quiz 1._____ Used to determine atmospheric pressure. 2._____ is a movable device attached to an elevated object such as a roof for showing the direction of the wind. 3._____ is a device for measuring wind speed

Quiz 4._____ are instruments used for measuring relative humidity. 5._____ is a device that measures temperature or temperature gradient using a variety of different principles 6._____7._____Two(2) types of barometer. 8._____is a term used to describe the amount of water vapor that exists in a gaseous mixture of air and water.

Identify the following pictures 9.

Identify the following pictures 10.