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First ground-based FTIR observations of methane in the inner tropics over several years

by A. K. Petersen, T. Warneke, C. Frankenberg, P. Bergamaschi, C. Gerbig, J. Notholt, M. Buchwitz, O. Schneising, O. Schrems show all authors
Atmospheric Chemistry and Physics ()

Abstract

Total column concentrations of methane have been retrieved from\nground-based solar absorption FTIR spectra in the near-infrared recorded\nin Paramaribo (Suriname). The methane FTIR observations are compared\nwith TM5 model simulations and satellite observations from SCIAMACHY,\nand represent the first validation of SCIAMACHY retrievals in the inner\ntropics using ground-based remote sensing techniques. Apart from local\nbiomass burning features, our methane FTIR observations agree well with\nTM5 model simulations. The comparison of the direct measured CH(4)/CO(2)\nratios by FTIR and satellite reveals that the satellite can hardly\ndetect methane emissions of tropical biomass burning due to the used\nretrieval method.

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