The Atmospheric Emitted Radiance Interferometer (AERI) is a ground-based instrument that measures the downwelling infrared radiance (radiant energy) from the Earth’s atmosphere.  The observations have broad spectral content, and sufficient spectral resolution to discriminate among gaseous emitters (e.g. carbon dioxide, water vapor) and suspended matter (e.g. aerosols, water droplets, ice crystals).  These uplooking surface observations can be used to obtain vertical profiles of tropospheric temperature and water vapor, as well as measurements of trace gases (e.g. ozone, carbon monoxide, methane) and downwelling infrared spectral signatures of clouds and aerosols.

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Atmospheric profiles of temperature and water vapor concentration over the course of a day, at the Southern Great Plains site in Oklahoma, retrieved from AERI data using the AERIprof algorithm.