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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.citation	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.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.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	journal article	es_ES
dc.date.updated	2015-12-23T11:12:01Z
dc.identifier.doi	10.1109/LGRS.2013.2286747
dc.identifier.idgrec	090869
dc.rights.accessRights	open access	es_ES