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VIS-NIR Reflectance Spectroscopy of Soils and Sediments Zoltán SZALAI, Klaudia KISS Laboratory for Sediment and Soil Analysis 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. BACKGROUND reflectance measurements internal reflectance external (total) reflectance specular reflectance diffuse reflectance 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. BACKGROUND 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. reflectance of pure minerals Wavelength (nm) component 892 haematite 960 goethtite 2206 smectite 2207 kaolinite 2268 gibbsite 2338 carbonates 2340 calcite 2443 illite R.A. Viscarra Rossel et al. / Geoderma 150 (2009) 253–266 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. First derivative spectra R.A. Viscarra Rossel et al. / Geoderma 137 (2006) 70–82 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. Second derivative spectra J.A.M. Dematteˆ et al. / Geoderma 121 (2004) 95–112 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. Some key wavelength for OM Wavelength Assignments Components 664 chlorophyll 1203 Cellulose, wax 1358 OH (in water) Lignin, cellulose, starch 1465 OH (in water v2,3) and CH2 Lignin, cellulose, starch 2169 Aromatic C=C Lignin, wax, tannin 2386 COO-; CH3 Pectin, proteins Ben Dor et al. / Remote Sens. Env. 61 (1997) 1–15 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. Field vs. Lab measurements R.A. Viscarra Rossel et al. / Geoderma 150 (2009) 253–266 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. Lab, field and remote sensing spectra 6th workshop of young researchers in astronomy and astrophysics 3-6. September 2012. Conclusions VIS-NIR diffuse reflectance spectroscopy is primarily serves qualitative analyses of sediments (mineral and organic phase) It is also uses for quantitative analyses (iron, clay, OM) Applicable to study analogues Applicable to calibrate remote sensing spectra
