Air Quality Measurement and Analysis by TROPOMI, OMI, MLS, OMPS, TANSO-FTS , and MERRA-2
Authors: Zeng Jane , Shen Suhung , Johnson James , Savtchenko Andrey , Iredell Lena , Wei Jennifer , Gerasimov Irina , Meyer David 
Published: March 2021

&lt;p&gt;Global and regional air quality measurements play an important role in the everyday life of people, inasmuch as atmospheric constituents such as ozone (O&lt;sub&gt;3&lt;/sub&gt;), carbon monoxide (CO), nitrogen dioxide (NO&lt;sub&gt;2&lt;/sub&gt;), sulfur dioxide (SO&lt;sub&gt;2&lt;/sub&gt;), methane (CH&lt;sub&gt;4&lt;/sub&gt;), and aerosols may cause severe&lt;!-- I guess I&amp;#8217;m conservative in my wording; I&amp;#8217;d say &amp;#8220;significant&amp;#8221; rather than &amp;#8220;severe&amp;#8221;.
--&gt; threats to human health and agriculture productivity. Space-based sensors on satellites&lt;!-- Redundant with &amp;#8220;Space-based&amp;#8221;; you could say &amp;#8220;Satellite sensors&amp;#8221; instead (which I prefer to &amp;#8220;Space-based&amp;#8221;) --&gt; are able to detect these atmospheric constituents directly and indirectly at high spatial and temporal scales. The TROPOspheric Monitoring Instrument (TROPOMI) on the Copernicus Sentinel-5 Precursor (Sentinel-5P) satellite provides measurements of O&lt;sub&gt;3&lt;/sub&gt;, NO&lt;sub&gt;2&lt;/sub&gt;, SO&lt;sub&gt;2&lt;/sub&gt;, CH&lt;sub&gt;4&lt;/sub&gt;, CO, formaldehyde (HCHO), aerosols, and cloud in ultraviolet-visible (UV-VIS), near infrared (NIR), and shortwave infrared (SWIR) spectral ranges. The Ozone Monitoring Instrument (OMI) aboard the Aura mission measures ozone, aerosols, clouds, surface UV irradiance, and trace gases including NO&lt;sub&gt;2&lt;/sub&gt;, SO&lt;sub&gt;2&lt;/sub&gt;, HCHO, BrO, and OClO using UV electromagnetic spectrum bands. The Ozone Mapping Profiler Suite (OMPS) on the Suomi National Polar-Orbiting Partnership (Suomi-NPP or SNPP) provides environmental data products including O&lt;sub&gt;3&lt;/sub&gt;, NO&lt;sub&gt;2&lt;/sub&gt;, SO&lt;sub&gt;2, &lt;/sub&gt;and aerosols. The Microwave Limb Sounder (MLS) on Aura has been monitoring atmospheric chemical species (CO, volcanic SO&lt;sub&gt;2&lt;/sub&gt;, O&lt;sub&gt;3&lt;/sub&gt;, N&lt;sub&gt;2&lt;/sub&gt;O, BrO), temperature, humidity, and cloud ice since 2004.&lt;!-- MLS measures more than the species indicated here. Do you want to add an &quot;etc.&quot; rather than list all? --&gt; MLS measurements help understand stratospheric ozone chemistry, and the effects of air pollutants injected into the upper troposphere and low stratosphere. The Thermal And Near infrared Sensor for carbon Observation - Fourier Transform Spectrometer (TANSO-FTS) on the Greenhouse Gases Observing Satellite (GOSAT) covers a wide spectral range from VIS to thermal infrared (TIR), which enables remote observations of the greenhouse gases carbon dioxide (CO&lt;sub&gt;2&lt;/sub&gt;) and CH&lt;sub&gt;4&lt;/sub&gt;. Furthermore, atmospheric constituent data are also available in the second Modern-Era Retrospective analysis for Research and Applications (MERRA-2) NASA's atmospheric reanalysis data collection. MERRA-2 uses an upgraded version of the Goddard Earth Observing System Model, version 5 (GEOS-5) data assimilation system, enhanced with more aspects of the Earth system. &lt;!-- Check this. I added &amp;#8220;atmospheric constituent data&amp;#8221;, because the sentence didn&amp;#8217;t make sense without it, and I believe that&amp;#8217;s what this sentence was about. --&gt;&lt;/p&gt;&lt;p&gt;The NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) supports over a thousand data collections in the focus areas of Atmospheric Composition, Water &amp; Energy Cycles, and Climate Variability. Some of these data collections include atmospheric composition products from the ongoing TROPOMI, OMI, OMPS, MLS, TANSO-FTS, and MERRA-2 missions and projects. The GES DISC web site (https://disc.gsfc.nasa.gov) provides multiple tools designed to help data users easily search, subset, visualize, and download data from these diverse sources in a unified way. We will demonstrate several methodologies employing these tools to monitor air quality.&lt;/p&gt;