AIRBORNE INFRARED SPECTROSCOPY OF 1994 WESTERN WILDFIRES

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1997

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Ohio State University

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In the summer of 1994, the 0.07- $cm^{-1}$ resolution infrared Airborne Emission Spectrometer (AES) recorded downlooking 4.5-13.5 $\mu m$ speetra over wildfires in central Oregon and near San Luis Obispo, $California^{a}$. The spectrometer was onboard the NASA DC-8 research aircraft, flying at an altitude of 12 km. The spectra form both fires show features due to $H_{2}O, CO_{2}, CO, NH_{3}, CH_{3}OH, HCOOH$, and $C_{2}H_{4}$ at significantly higher abundances and temperatures than in spectra of normal atmospheric and ground conditions. Column densities have been derived for several species and compared with previously biomass fire measurements. Preliminary modeling of the observed absorption and emission features on the basis of currently available spectroscopic databases is described.

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$^{a}$H. Worden, R. Beer, and C.P. Rinsland, J. Geophys. Res. 102, 1287 (1997).
Author Institution: Jet Propulsion Laboratory, California Institute of Technology; Jet Propulsion Laboratory, NASA Langley Research Center

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