Soil moisture active and passive microwave products: intercomparison and evaluation over a Sahelian site
| Autor: | E. G. Njoku, Wolfgang Wagner, P. de Rosnay, S. Hasenauer, Eric Mougin, Mehrez Zribi, R.A.M. de Jeu, Thomas R. H. Holmes, Yann Kerr, F. Timouk, C. Gruhier |
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| Přispěvatelé: | Centre d'études spatiales de la biosphère (CESBIO), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), European Centre for Medium-Range Weather Forecasts (ECMWF), Institute of Photogrammetry and Remote Sensing, Faculty of Earth and Life Sciences, Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), NASA-California Institute of Technology (CALTECH), Hydrology and Geo-environmental sciences |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
010504 meteorology & atmospheric sciences
Soil Moisture [SDE.MCG]Environmental Sciences/Global Changes 0207 environmental engineering Soil science 02 engineering and technology Monsoon Spatial distribution Mali 01 natural sciences lcsh:Technology lcsh:TD1-1066 Passive Microwaves Sahel Intercomparison lcsh:Environmental technology. Sanitary engineering 020701 environmental engineering [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Water content lcsh:Environmental sciences 0105 earth and related environmental sciences Remote sensing lcsh:GE1-350 Moisture TMI lcsh:T lcsh:Geography. Anthropology. Recreation AMSR-E lcsh:G Soil water Spatial ecology Environmental science Satellite AMMA ERS Microwave SMOS |
| Zdroj: | Scopus-Elsevier Gruhier, C, de Rosnay, P, Hasenauer, S, Holmes, T R H, de Jeu, R A M, Kerr, Y, Mougin, E, Njoku, E, Timouk, F, Wagner, W & Zribi, M 2010, ' Soil moisture active and passive microwave products : intercomparison and evaluation over a Sahelian site ', Hydrology and Earth System Sciences, vol. 14, no. 1, pp. 141-156 . https://doi.org/10.5194/hessd-6-5303-2009, https://doi.org/10.5194/hess-14-141-2010 Hydrology and Earth System Sciences, 14(1), 141-156. European Geosciences Union Hydrology and Earth System Sciences, Vol 14, Iss 1, Pp 141-156 (2010) |
| ISSN: | 1027-5606 1607-7938 |
| Popis: | This paper presents a comparison and an evaluation of five soil moisture products based on satellite-based passive and active microwave measurements. Products are evaluated for 2005–2006 against ground measurements obtained from the soil moisture network deployed in Mali (Sahel) in the framework of the African Monsoon Multidisciplinary Analysis project. It is shown that the accuracy of the soil moisture products is sensitive to the retrieval approach as well as to the sensor type (active or passive) and to the signal frequency (from 5.6 GHz to 18.8 GHz). The spatial patterns of surface soil moisture are compared between the different products at meso-scale (14.5° N–17.5° N and 2° W–1° W). A general good consistency between the different satellite soil moisture products is shown in terms of meso-scale spatial distribution, in particular after convective rainfall occurrences. Soil moisture values provided by the different products are compared to ground measurements time series. Although soil moisture products obtained from satellite generally over-estimate soil moisture values during the dry season, most of them capture soil moisture temporal variations in good agreement with ground station measurements. |
| Databáze: | OpenAIRE |
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