- One set of AERI summary products from the ARM archive includes wavenumber averages over very narrow regions of the IR spectrum; three in the LW band (675-680 cm-1, 700-705 cm-1, 985-990 cm-1) and three in the SW band (2295-2300 cm-1, 2282-2287 cm-1, and 2510-2515 cm-1).
- These wavenumber ranges are a measure of near surface air temperature, elevated air temperature, and IR window temperatures, respectively.
- Both radiance and equivalent blackbody brightness temperature are included in the ARM data archive for these summary products.
- The 675-680 cm-1 brightness temperature product is near the center of the carbon dioxide absorption band at 15 μm.
- The 2295-2300 m-1 brightness temperature product is similarly located within the 4.3 μm carbon dioxide absorption band. The 15 μm and 4.3 μm wavelengths are nearly opaque, making them good measures of the mean temperature within the first 30 meters of air above the instrument.
Here is a picture of AERI as acronym of the suggestive name Atmospheric Emitted Radiance Interferometer, which in fact is an infrared thermometer: