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  2. Dobson unit - Wikipedia

    en.wikipedia.org/wiki/Dobson_unit

    The Dobson unit (DU) is a unit of measurement of the amount of a trace gas in a vertical column through the Earth's atmosphere.It originated by, and continues to be primarily used in respect to, the study of atmospheric ozone, whose total column amount, usually termed "total ozone", and sometimes "column abundance", is dominated by the high concentrations of ozone in the stratospheric ozone layer.

  3. Ground-level ozone - Wikipedia

    en.wikipedia.org/wiki/Ground-level_ozone

    Total atmospheric ozone (sometimes seen in weather reports) is measured in a column from the surface to the top of the atmosphere, and is dominated by high concentrations of stratospheric ozone. Typical units of measure for this purpose include the Dobson unit and millimoles per square meter (mmol/m 2).

  4. Ozone - Wikipedia

    en.wikipedia.org/wiki/Ozone

    The study of ozone concentration in the atmosphere started in the 1920s. ... including medical grade and industrial grade ozone generators, these units usually work ...

  5. Dobson ozone spectrophotometer - Wikipedia

    en.wikipedia.org/wiki/Dobson_ozone_spectrophotometer

    Dobson spectrophotometers can be used to measure both total column ozone and profiles of ozone in the atmosphere. [5] [6] Ozone is tri-atomic oxygen, O 3; ozone molecules absorb harmful UV light in the atmosphere before it reaches the surface of the earth. No UVC radiation penetrates to the ground as it is absorbed in the ozone-oxygen cycle.

  6. Air quality index - Wikipedia

    en.wikipedia.org/wiki/Air_quality_index

    An air quality measurement ... there is a discontinuous jump of one AQI unit. To convert from concentration to AQI ... The ozone AQI between 100 and 300 is computed ...

  7. Ozone monitor - Wikipedia

    en.wikipedia.org/wiki/Ozone_monitor

    An ozone monitor of this type operates by pulling an air sample from the atmosphere into the machine with an air pump. [3] During one cycle, the ozone monitor will take one air sample through the air inlet, and scrub the ozone from the air; for the next cycle, an air sample bypasses the scrubber and the ozone value calculated.

  8. Air pollution measurement - Wikipedia

    en.wikipedia.org/wiki/Air_pollution_measurement

    Air pollution measurement is the process of collecting and measuring the components of air pollution, notably gases and particulates. The earliest devices used to measure pollution include rain gauges (in studies of acid rain ), Ringelmann charts for measuring smoke , and simple soot and dust collectors known as deposit gauges . [ 1 ]

  9. Weather balloon - Wikipedia

    en.wikipedia.org/wiki/Weather_balloon

    The unit that performs the actual measurements and radio transmissions hangs at the lower end of the string, and is called a radiosonde. Specialized radiosondes are used for measuring particular parameters, such as determining the ozone concentration.

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