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Difficulty: MediumWeather Elements, Instruments, and Measurements

A meteorological technician at an airfield weather station needs to measure atmospheric pressure to assist aircraft pilots with altimeter settings. Which measuring instrument must be used, and in what standard unit is this atmospheric parameter recorded?

  1. Barometer, measured in millibarsAnswer
  2. B
    Hygrometer, measured in percentage
  3. C
    Anemometer, measured in knots
  4. D
    Wind vane, measured in cardinal degrees

Answer

The barometer is the correct instrument used to measure atmospheric pressure, which is standardly reported in millibars (mb) or hectopascals (hPa).
Atmospheric pressure is the force exerted per unit area by the weight of the air column above a location. It is measured using a barometer (mercury or aneroid barometer) and expressed standardly in millibars (mb) or hectopascals (hPa).

Step-by-Step Solution

1
Identify the target meteorological parameter required
The target parameter is atmospheric pressure.
Airfield weather stations report pressure settings to ensure accurate aircraft altimeter calibration.
2
Match the target parameter to its correct measuring instrument and standard unit
Atmospheric pressure is measured using a barometer (either mercury or aneroid type) and recorded in millibars (1 mb=100 Pa1\text{ mb} = 100\text{ Pa}) or hectopascals (hPa).
Each weather element requires a specific instrument and SI/meteorological unit.

Key Concept

Atmospheric pressure measurement and meteorological instruments
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Topics

Weather Elements, Instruments, and Measurements

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