Std 7 weather and climate
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Transcript of Std 7 weather and climate
The Weather
Observing and recording
Powerpoint Presentation © Pitsford Hall weather stationNorthamptonshire Grammar SchoolAbridged version without video clips
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.
Temperature
Temperature is recorded using thermometers housed inside a Stevenson screen
Weather stations record both air temperature and the temperature of the ground
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?
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
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
The Beaufort Scale
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
Recording pressure
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
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
Cloud Types - Cumulonimbus
Cloud Types - Cumulus
Cloud Types - Stratus
Cloud Types - Cirrus