AIRS provides satellite retrieval of mid-tropospheric carbon dioxide even under cloudy conditions, without the use of a priori information from models. AIRS retrievals use cloud-cleared thermal IR radiance spectra in the 15 micron band with an accuracy better than 2 ppm. AIRS retrievals have been used to produce global maps of carbon dioxide and other trace gases including ozone, methane, and carbon monoxide.
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|CO2 for February, 2012 derived from Level 3 version 5.9 AIRS and MSU retrievals. Ascending and descending nodes were combined. Top: average CO2; middle: standard deviation of observations; bottom: the observation count. (Climate Data Guide; D. Shea)|
|AIRS sensitivity to carbon dioxide with altitude. Source: http://airs.jpl.nasa.gov/data/about_airs_co2_data/|
|CO (carbon monoxide) for ascending and descending nodes of AIRS for February, 2013. (Climate Data Guide; D. Shea)|
|CH4 (methane) for ascending and descending nodes of AIRS for February, 2013 at three levels: 51, 60, 67 hPa. (Climate Data Guide; D. Shea)|
National Center for Atmospheric Research Staff (Eds). Last modified 14 Oct 2013. "The Climate Data Guide: AIRS and AMSU: Trace Gases (CO2, CO, CH4, O3...); Level 3." Retrieved from https://climatedataguide.ucar.edu/climate-data/airs-and-amsu-trace-gases-co2-co-ch4-o3-level-3.