Std 7 weather and climate
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Transcript of Std 7 weather and climate
![Page 1: Std 7 weather and climate](https://reader036.fdocuments.net/reader036/viewer/2022081422/55498248b4c90582588b4bf6/html5/thumbnails/1.jpg)
The Weather
Observing and recording
Powerpoint Presentation © Pitsford Hall weather stationNorthamptonshire Grammar SchoolAbridged version without video clips
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The Weather Station
A weather station makes continuous measurements of different aspects of the weather.
Weather stations use standard instruments so that their readings can be compared.
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Temperature
Temperature is recorded using thermometers housed inside a Stevenson screen
Weather stations record both air temperature and the temperature of the ground
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Temperature: The Stevenson Screen
Why is the screen painted white?
Why is it raised on legs above the ground?
Why has it got louvred sides?
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Precipitation
Rainfall, snow, hail and fog.
Rainfall is measured in a raingauge.
Some raingauges record rainfall automatically whilst others are emptied everyday by an observer
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Wind
The direction and strength of the wind are both measured
A wind vane measures direction
An anemometer records strength
Wind strength can also be measured using the Beaufort Scale
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The Beaufort Scale
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Pressure
Pressure is the weight of the atmosphere
When air rises pressure falls
When air sinks pressure increases
Pressure controls the type of weather
Barometers and barographs record pressure
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Recording pressure
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Sunshine
A note is made of the number of hours of bright sunshine each day
Sunshine is traditionally measured using a Campbell-Stokes sunshine recorder
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Cloud
The amount of the sky obscured by cloud
Different types of clouds
Sometimes even the speed and direction in which the clouds are moving are recorded using a nephoscope
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Cloud Types - Cumulonimbus
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Cloud Types - Cumulus
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Cloud Types - Stratus
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Cloud Types - Cirrus