HAL : ird-00701178, version 1

DOI : 10.1109/TGRS.2012.2184126

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IEEE Transactions on Geoscience and Remote Sensing 50, 5 (2012) 1587-1601

L-Band radiative properties of vine vegetation at the MELBEX III SMOS Cal/Val Site

M. Schwank (  Auteur correspondant ) 1, J.-P. Wigneron 2, E. Lopez-Baeza 3, I. Völksch 4, C. Matzler 5, Y.H. Kerr 6

(2012)

Radiative properties at 1.4 GHz of vine vegetation are investigated by measuring brightness temperatures with the ETH L-band Radiometer II (ELBARA II) operated on a tower at the Mediterranean Ecosystem L-band Characterisation Experiment III (MELBEX III) field site in Spain. To this aim, experiments with and without a reflecting foil placed under the vines were performed for the vegetation winter and summer states, respectively, to provide prevailingly information on vegetation transmissivities. The resulting parameters, which can be considered as "ground truth" for the MELBEX III vineyard, were retrieved from brightness temperature at horizontal and vertical polarization measured at observation angles between 30◦ and 60◦. These MELBEX III "ground-truth" values are representative for the Mediterranean Soil Moisture and Ocean Salinity (SMOS) Valencia Anchor Station (VAS) and therefore valuable for the corresponding calibration and validation activities over the VAS site. Likewise, quantifying the uncertainties of the measured brightness temperatures was also important, particularly as several equivalent ELBARA II instruments are currently operative in ongoing SMOS-related field campaigns.

1 :	Geoecology and Geomorphology
	geoecology
2 :	Écologie fonctionnelle et physique de l'environnement (EPHYSE - UR1263)
	Institut national de la recherche agronomique (INRA) : UR1263
3 :	Université de Valence
	University of Valencia
4 :	Institut Fédéral de Recherches sur la Forêt, la Neige et le Paysage (WSL)
	Institut Fédéral de Recherches [Suisse]
5 :	Institute of Applied Physics (IAP)
	Université de Berne
6 :	Centre d'études spatiales de la biosphère (CESBIO)
	CNRS : UMR5126 – Institut de recherche pour le développement [IRD] – CNES – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III

domaine

:

Sciences du Vivant/Ecologie, Environnement/Ecosystèmes

mots-clés : Microwave radiometry – radiative transfer – soil moisture – vegetation mapping.

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Contributeur : Dominique Bruel <>

Soumis le : Jeudi 24 Mai 2012, 16:41:33

Dernière modification le : Mardi 29 Mai 2012, 16:51:04