Abstract
Soil mineralogy can be used to study changes in the environment affecting the soil surface, such as dust from the desert through Aeolian processes, which is one of the sources that determine the mineral nature of the soil. Ground- and field-based hyperspectral longwave infrared images, acquired before and after dust dispersion on the soil surface, were processed and analyzed by applying a procedure for determining soil surface mineralogy from the emissivity spectrum, using two indices―SQCMI (the Soil Quartz Clay Mineral Index) and SCI (the Soil Carbonate Index)―to identify changes in the abundance of quartz, clay minerals and carbonates on the surface, caused by the settling dust particles. Mineralogical changes were identified, depending on the mineral composition of the dust compared to the soil surface mineralogy.
Highlights
Soil mineralogy, which holds important information on soil origin and development, can be used to study changes in the environment affecting the chemo-physical properties of the surface
In a previous study [9], we developed a procedure for determining soil mineralogy using LWIR images
The identification of mineralogical changes depended on the mineral composition of the dust compared to the soil surface mineralogy
Summary
Soil mineralogy, which holds important information on soil origin and development, can be used to study changes in the environment affecting the chemo-physical properties of the surface. Two created indices—SQCMI (Soil Quartz Clay Mineral Index), indicating the amount of quartz relative to clay minerals, and SCI (Soil Carbonate Index), indicating the concentration of carbonates in the soil—enabled us to determine the mineralogy, from more to less abundant, in each soil sample. Pursuant to those results, we applied the procedure to ground- and field-based hyperspectral LWIR images to study the ability to identify changes in the abundance of quartz, clay minerals and carbonates in the soil resulting from the dispersion of desert dust-like materials on the surface, and to assess the interaction of the soil surface with desert dust particles
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