Editing Ground-level ozone (section)

==Measurement==
[[Ozone]] in the atmosphere can be measured by [[remote sensing|remote sensing technology]], or by [[in situ#Earth, ocean, and atmospheric sciences|''in-situ'']] monitoring technology. Because ozone absorbs light in the [[ultraviolet|UV]] spectrum, the most common way to measure ozone is to measure how much of this light spectrum is absorbed in the atmosphere.<ref name=":5">{{cite web |title=How is ozone measured in the atmosphere? |website=ERSL NOAA |url=https://csl.noaa.gov/assessments/ozone/2010/twentyquestions/Q5.pdf}}</ref><ref>{{cite news |title=Measuring ozone from space |url=https://phys.org/news/2016-09-ozone-space.html |access-date=2018-11-12}}</ref> Because the stratosphere has higher ozone concentration than the troposphere, it is important for remote sensing instruments to be able to determine altitude along with the concentration measurements. A ''total ozone mapping spectrometer-earth probe '' (TOMS-EP) aboard a satellite from [[NASA]] is an example of an ozone layer measuring satellite,<ref>{{cite web |title=total-ozone-mapping-spectrometer-earth-probe |last=NASA |url=https://eospso.nasa.gov/missions/total-ozone-mapping-spectrometer-earth-probe}}</ref> and the ''tropospheric emission spectrometer'' (TES) is an example of an ozone measuring satellite that is specifically for the troposphere.<ref>{{cite web |title=TROPESS Project & TES Mission |last=NASA |website=tes.jpl.nasa.gov |url=https://tes.jpl.nasa.gov/ |access-date=2018-11-12}}</ref> [[LIDAR]] is a common ground-based remote sensing technique that uses [[laser]] to measure ozone. The ''Tropospheric Ozone Lidar Network'' (TOLNet) is the network of ozone observing lidars across the United States.<ref>{{cite web |title=NASA Tropospheric Chemistry Integrated Data Center |last=LaRC |first=Ali Aknan |date=2005-06-22 |website=www-air.larc.nasa.gov |url=https://www-air.larc.nasa.gov/missions/TOLNet/ |access-date=2018-11-12}}</ref>

Ozonesondes are a form of ''in situ'', or local ozone measuring instruments. An ozonesonde is attached to a meteorological balloon, so that the instrument can directly measure ozone concentration at the varying altitudes along the balloon's upward path. The information collected from the instrument attached to the balloon is transmitted back using [[radiosonde]] technology.<ref name=":5"/> [[National Oceanic and Atmospheric Administration|NOAA]] has worked to create a global network of tropospheric ozone measurements using ozonesondes.<ref>{{cite web |title=ESRL Global Monitoring Laboratory - Ozone and Water Vapor |publisher=US Department of Commerce, NOAA, Earth System Research Laboratory |website=esrl.noaa.gov |url=https://gml.noaa.gov/ozwv/ozsondes/ |access-date=2018-11-12}}</ref>

Ozone is also measured in [[air quality]] [[environmental monitoring]] networks. In these networks, in-situ [[ozone monitor]]s based on ozone's UV-absorption properties are used to measure ppb-levels in ambient air.

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 [[millimole]]s per square meter (mmol/m<sup>2</sup>).