TY - JOUR
T1 - Universal quadratic soil spectral reflectance line and its deviation patterns' relationships with chemical and textural properties
T2 - A global data base analysis
AU - Shoshany, Maxim
AU - Roitberg, Elena
AU - Goldshleger, Naftaly
AU - Kizel, Fadi
N1 - Publisher Copyright:
© 2022 The Authors
PY - 2022/10
Y1 - 2022/10
N2 - Quantitative evidence for the fundamental spectral shape similarity existing between different soils is presented utilizing Pearson's correlation and SAM (Spectral Angle Mapper) analysis in-between signatures representing thousands of soil samples collected from different environments around the world. A universal quadratic soil line (UQSL) was found to highly fit these representative signatures as well as spectra from the ISRIC (International Soil Reference and Information Center) global database including soil samples collected from 58 countries. K-means clustering of ISRIC spectral reflectance deviations from the UQSL facilitated identification of 5 characteristic deviation patterns. Significant correlation was found for a set of 1000 soil samples between changes in multiple chemical properties and corresponding reflectance changes between these clusters. Future availability of large global soil data bases may allow improved determination of the UQSL and generalization of its deviation patterns relationships with PBC (Physical, Biological and Chemical) properties for wide areas monitoring of soil conditions.
AB - Quantitative evidence for the fundamental spectral shape similarity existing between different soils is presented utilizing Pearson's correlation and SAM (Spectral Angle Mapper) analysis in-between signatures representing thousands of soil samples collected from different environments around the world. A universal quadratic soil line (UQSL) was found to highly fit these representative signatures as well as spectra from the ISRIC (International Soil Reference and Information Center) global database including soil samples collected from 58 countries. K-means clustering of ISRIC spectral reflectance deviations from the UQSL facilitated identification of 5 characteristic deviation patterns. Significant correlation was found for a set of 1000 soil samples between changes in multiple chemical properties and corresponding reflectance changes between these clusters. Future availability of large global soil data bases may allow improved determination of the UQSL and generalization of its deviation patterns relationships with PBC (Physical, Biological and Chemical) properties for wide areas monitoring of soil conditions.
KW - Absorption features
KW - Continuum removal
KW - Hyperspectral remote sensing
KW - Soil chemical properties
KW - Soil reflectance
KW - Soil texture composition
UR - http://www.scopus.com/inward/record.url?scp=85135515843&partnerID=8YFLogxK
U2 - 10.1016/j.rse.2022.113182
DO - 10.1016/j.rse.2022.113182
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AN - SCOPUS:85135515843
SN - 0034-4257
VL - 280
JO - Remote Sensing of Environment
JF - Remote Sensing of Environment
M1 - 113182
ER -