Chapter 5 - Chapter 5 Meteorological observations can be...

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Chapter 5 Meteorological observations can be done in 2 ways: o Direct Methods- measure properties of the air that are in contact with the instrument being used. Ex: Thermometer o Indirect Methods- do not come into physical contact, obtain data from afar. Can be both active and passive. Direct Methods measure: o Temperature- Mercury Thermometer, Resistance Thermometer o Humidity- Dew Point Hygrometer, Psychrometer (measures relative humidity) o Pressure- Mercury Barometer, Aneroid Barometer o Wind- has both speed and direction. Anemometers measure wind speed and Wind Vanes measure wind direction. Cup Anemometer, Propellers, and Windsocks measure wind speed. o Precipitation- Rain Gauge Radiosondes are instrument packages carried aloft by a helium-filled “weather balloon” that measure vertical profiles of air temperature, relative humidity, and pressure from the ground up to 30 kilometers. Rawinsondes measure wind speed and direction, along with temperature and humidity, by tracking the position of the balloon Indirect Methods types are: o Active sensors- emit energy into the atmosphere and then measure the energy that returns. o
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Chapter 5 - Chapter 5 Meteorological observations can be...

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