Mineral climate indicators in paleoflooded and emerged areas around lake marshes (Tablas de Daimiel, Spain) using hyperspectral DAIS 7915 spectrometer data
| Autor: | A. Riaza, Mercedes Suárez, E. García Meléndez, A. Müller |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
chemistry.chemical_classification
geology geography Soil salinity Gypsum geography.geographical_feature_category Marsh limnology Earth science Fluvial Mineralogy Dais Wetland engineering.material chemistry.chemical_compound hyperspectral chemistry paleoclimate engineering General Earth and Planetary Sciences Environmental science Carbonate Organic matter |
| Zdroj: | International Journal of Remote Sensing. 26:4565-4582 |
| ISSN: | 1366-5901 0143-1161 |
| DOI: | 10.1080/01431160500196836 |
| Popis: | Hyperspectral imagery has been able to distinguish paleoflooded areas related to a receding wetland due to differential mineralogical content associated with variable humidity in the past, and palustrine and fluvial processes, through maps performed using hyperspectral image processing. Gypsum, carbonate and organic matter are paleoclimate indicators spectrally recorded by the imagery in the visible and near infrared. Saline soils with gypsum, both on occasionally flooded areas adjacent to shallow river bands and on mudflats around standing water pools, have been mapped using DAIS data. Originally deeper areas, rich in organic matter where marshes develop at times of low water movement, are also shown. Sediments permanently exposed to the atmosphere dehydrate and oxidize, developing different mineralogical associations. Increase of the iron oxide/hydroxide rate and decarbonation can be spectrally followed on the sands framing the now‐marshy area. A general outline of the past pools is drawn in the area su... |
| Databáze: | OpenAIRE |
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