Infrared Continental Surface Emissivity Spectra Retrieved from AIRS Hyperspectral Sensor | Zendy

Eric Péquignot | Zendy; A. Chédin | Zendy; N. A. Scott | Zendy

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Infrared Continental Surface Emissivity Spectra Retrieved from AIRS Hyperspectral Sensor

Author(s) -

Eric Péquignot,

A. Chédin,

N. A. Scott

Publication year - 2008

Publication title -

journal of applied meteorology and climatology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.079

H-Index - 134

eISSN - 1558-8432

pISSN - 1558-8424

DOI - 10.1175/2007jamc1773.1

Subject(s) - atmospheric infrared sounder , emissivity , remote sensing , environmental science , radiative transfer , radiance , atmospheric radiative transfer codes , moderate resolution imaging spectroradiometer , infrared window , spectral resolution , atmospheric sciences , spectral line , infrared , water vapor , meteorology , geology , physics , optics , satellite , astronomy

Atmospheric Infrared Sounder (AIRS; NASA Aqua platform) observations over land are interpreted in terms of monthly mean surface emissivity spectra at a resolution of 0.05 μm and skin temperature. For each AIRS observation, an estimation of the atmospheric temperature and water vapor profiles is first obtained through a proximity recognition within the thermodynamic initial guess retrieval (TIGR) climatological library of about 2300 representative clear-sky atmospheric situations. With this a priori information, all terms of the radiative transfer equation are calculated by using the Automatized Atmospheric Absorption Atlas (4A) line-by-line radiative transfer model. Then, surface temperature is evaluated by using a single AIRS channel (centered at 12.183 μm) chosen for its almost constant emissivity with respect to soil type. Emissivity is then calculated for a set of 40 atmospheric windows (transmittance greater than 0.5) distributed over the AIRS spectrum. The overall infrared emissivity spectr...

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