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Detailed Reference Information |
Jin, L., Ji, J., Balsam, W., Chen, Y., Chen, J. and Lu, H. (2003). Determining magnetic susceptibility in loess-paleosol sections by near-infrared reflectance spectroscopy. Geophysical Research Letters 30: doi: 10.1029/2003GL017389. issn: 0094-8276. |
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Loess deposits are widespread, covering about 10 percent of the Earth's land surface. Magnetic susceptibility (MS), an important parameter in loess deposits, is a function of the concentration of magnetic minerals, which exhibit diagnostic features in their visible and near-infrared (NIR) spectra. Therefore, MS should correlate with spectral reflectance. To determine if a relationship exists between MS and reflectance spectra we analyzed NIR spectra and MS of over 550 samples from seven loess-paleosol sequences on Loess Plateau of Central China. NIR reflectance data were first converted into eight spectral bands and then a step-wise multiple linear regression was applied to a calibration dataset to establish a model to predict MS values. Test datasets indicate our model is very successful, all produced an r2 > 0.9. By applying this new method for estimating MS to hyperspectral remote sensing data we anticipate mapping soil quality and MS on the Loess Plateau. |
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Abstract |
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Keywords
Geomagnetism and Paleomagnetism, Environmental magnetism, Geomagnetism and Paleomagnetism, Instruments and techniques, Exploration Geophysics, Instruments and techniques, Electromagnetics, Measurement and standards, Global Change, Remote sensing |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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