Effect of Soil Moisture on the Angular Variation of Thermal Infrared Emissivity of Inorganic Soils
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Effect of Soil Moisture on the Angular Variation of Thermal Infrared Emissivity of Inorganic Soils

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Effect of Soil Moisture on the Angular Variation of Thermal Infrared Emissivity of Inorganic Soils

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dc.contributor.author García Santos, Vicente
dc.contributor.author Valor i Micó, Enric
dc.contributor.author Caselles Miralles, Vicente
dc.contributor.author Coll Company, César
dc.contributor.author Burgos, Mª Ángeles
dc.date.accessioned 2015-12-23T11:11:46Z
dc.date.available 2015-12-23T11:11:46Z
dc.date.issued 2013
dc.identifier.uri http://hdl.handle.net/10550/49751
dc.description.abstract Emissivity is influenced by different factors. This study deals with the effect of the soil moisture (SM) content on the zenithal (θ) variation of ratio-to-nadir emissivity (εr), for a wide variety of inorganic bare soils. To retrieve εr, a goniometer assembly was used, together with two identical CIMEL Electronique CE312-2 radiometers working at six spectral bands within 7.7-14.3 μm, performing simultaneous radiance measurements at different combinations of zenith and azimuth angles. The results showed that the effect of SM upon εr(θ) is different depending on the spectral range and textural composition of the sample. Sandy soils showed a decrease of εr(θ) from nadir up to 0.132 for θ ≥ 40° at 8-9.4 μm under dry conditions, but this decrease was reduced to 0.093 with the increase of SM. Clayey samples did not present dependence of εr(θ) on SM. Loamy texture samples presented a more sharp decrease of εr(θ) with the increase of SM, reaching differences between nadir values and 70 ° up to 6%, at all spectral ranges studied. Finally, a parameterization of εr with SM and θ was derived allowing to obtain ratio-to-nadir emissivities with an accuracy of ± 0.011.
dc.language.iso eng
dc.relation.ispartof Ieee Geoscience And Remote Sensing Letters, 2013, vol. 11, num. 6, p. 1091-1095
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source García Santos, Vicente Valor i Micó, Enric Caselles Miralles, Vicente Coll Company, César Burgos, Mª Ángeles 2013 Effect of Soil Moisture on the Angular Variation of Thermal Infrared Emissivity of Inorganic Soils Ieee Geoscience And Remote Sensing Letters 11 6 1091 1095
dc.subject Ciències de la terra
dc.subject Termodinàmica
dc.subject Teledetecció
dc.title Effect of Soil Moisture on the Angular Variation of Thermal Infrared Emissivity of Inorganic Soils
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-12-23T11:12:01Z
dc.identifier.doi http://dx.doi.org/10.1109/LGRS.2013.2286747
dc.identifier.idgrec 090869

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