WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed...

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WEATHER INSTRUMENTS 24-3

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Transcript of WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed...

Page 1: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

WEATHER INSTRUMENTS

24-3

Page 2: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Lower-Atmospheric Conditions

Can change a lot in a day

Magnitude and speed of changes to make predictions

Page 3: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.
Page 4: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Air Temperature

Thermometer – measures and indicates temperature

Liquid – mercury or alcohol

Heat causes expansion = rise in sealed tube

Page 5: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Galileo Thermometer

Weight of each tag is slightly different from the others.

Bubbles are calibrated by adding a certain amount of fluid to them so that they have the exact same density.

Each differs very slightly in density

Page 6: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Electric thermometer

Temperature rises – current increases through devise

Thermistor – responds very quickly to temperature change

Page 7: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Air Pressure

Approach of a front usually indicates a drop in air pressure

Barometer

Page 8: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.
Page 9: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Wind Speed

Anemometer – measures wind speed

Page 10: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Wind Direction

Wind vane

16 compass directions

Degrees in a circle

Page 11: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.
Page 12: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Upper-Atmospheric Conditions

Page 13: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Radiosonde

Helium filled weather balloon

Measures:HumidityAir PressureTemperature

Radio waves transmit info

Eventually expands and bursts

Page 14: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Radar

RAdioDetectionAndRanging

Velocity of objects

Location

Reflected radio waves

Page 15: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.
Page 16: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Weather Satellites

Provides information of areas when ground observations cannot be made

Infrared energy at night

Temperature of ocean water – currents or waves

Page 17: WEATHER INSTRUMENTS 24-3. Lower-Atmospheric Conditions Can change a lot in a day Magnitude and speed of changes to make predictions.

Computers

Process lots of information

Weather programs

Store past information


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