Meteorological Instruments Barometer Barometer n Used to determine
Meteorological Instruments
Barometer
Barometer n 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 n is a device that measures temperature or temperature gradient using a variety of different principles
Hygrometer or Psychrometer n 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. n Relative humidity is a term used to describe the amount of water vapor that exists in a gaseous mixture of air and water.
Anemometer n anemometer is a device for measuring wind speed, and is one instrument used in a weather station.
Wind Vane n. 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 n Helicoid propeller anemometer incorporating a wind vane for orientation.
Quiz n 1. _____ Used to determine atmospheric pressure. n 2. _____ is a movable device attached to an elevated object such as a roof for showing the direction of the wind. n 3. _____ is a device for measuring wind speed
Quiz 4. _____ are instruments used for measuring relative humidity. n 5. _____ is a device that measures temperature or temperature gradient using a variety of different principles n 6. _____7. _____Two(2) types of barometer. n 8. _____is a term used to describe the amount of water vapor that exists in a gaseous mixture of air and water. n
Identify the following pictures n 9.
Identify the following pictures n 10.
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