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  2. 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. The solenoid ...

  3. Air pollution measurement - Wikipedia

    en.wikipedia.org/wiki/Air_pollution_measurement

    They use fans to suck in the air, filter it, and either analyze it automatically there and then or collect and store it for later analysis in a laboratory. Active sensors use either physical or chemical methods. [8] Physical methods measure an air sample without changing it, for example, by seeing how much of a certain wavelength of light it ...

  4. Ozone Mapping and Profiler Suite - Wikipedia

    en.wikipedia.org/wiki/Ozone_Mapping_and_Profiler...

    Ozone Mapping and Profiler Suite (OMPS), is a suite of instruments built by Ball Aerospace that measure the global distribution of ozone and, less frequently, how it is distributed vertically within the stratosphere. [1] The suite flies on the Suomi NPP and NOAA-20 (formerly JPSS-1) satellites along with several other instruments.

  5. 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.

  6. 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.

  7. Radiosonde - Wikipedia

    en.wikipedia.org/wiki/Radiosonde

    Raw upper air data is routinely processed by supercomputers running numerical models. Forecasters often view the data in a graphical format, plotted on thermodynamic diagrams such as Skew-T log-P diagrams , Tephigrams , and or Stüve diagrams , all useful for the interpretation of the atmosphere's vertical thermodynamics profile of temperature ...

  8. Particulate matter sampler - Wikipedia

    en.wikipedia.org/wiki/Particulate_matter_sampler

    Modern particulate samplers use a volumetric flow control system that pulls air through the particle separator at the velocity required to achieve the desired cutpoint. For air pollution applications, the definition of "particulate" does not include uncombined water , and water from a particulate sample must be removed before it is weighed.

  9. National Ambient Air Quality Standards - Wikipedia

    en.wikipedia.org/wiki/National_Ambient_Air...

    In April 2023, the EPA finalized its "Good Neighbor Plan", which phases in tighter standards for NO x, using a cap and trade system during the summer "ozone season". This is intended to reduce ground-level ozone in non-attainment areas downwind of industrial sources like power plants, incinerators, and industrial furnaces, often in other states ...