Characterization of vegetation type using DOAS satellite retrievals
Thomas Wagner(1), Steffen Beirle(1), Michael Grzegorski(1) and Ulrich Platt(1)
(1) Uni-Heidelberg, INF 229, D-69120 Heidelberg, Germany
Novel UV/vis satellite instruments measure the backscattered solar radiation with moderate spectral resolution (FWHM 0.2 – 0.4 nm). Thus they allow to analyse the spectral absorption features of various atmospheric trace gases. In addition to atmospheric scattering and absorption processes, the measured spectra are also influenced by the surface properties.
We present results of the satellite DOAS analysis in the red spectral range (605-685nm). Here, in addition to the absorption features of O2, O4, and H2O, also spectral signatures of different vegetation types can be identified and analysed.
From our results we conclude that at least deciduous tress and conifers can be distinguished. An additional advantage of our method is that it automatically corrects for atmospheric absorptions. We present the global yearly vegetation cycle using observations from GOME on ERS-2. Similar analyses will be possible for satellite observations from SCIAMACHY and the GOME-2 series.
Keywords: ESA European
Space Agency - Agence spatiale europeenne,
observation de la terre, earth observation,
satellite remote sensing,
teledetection, geophysique, altimetrie, radar,
chimique atmospherique, geophysics, altimetry, radar,