Assessment of different SMOS Level 3 soil moisture products
European Space Agency’s 2019 Living Planet Symposium, 13-17 May 2019, Milan, Italy
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2019-05-13
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European Space Agency’s 2019 Living Planet Symposium, 13-17 May 2019, Milan, Italy |
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póster de congreso |
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Pablos, Miriam Vall-llossera, Mercè Piles, María Camps, Adriano González-Haro, Cristina Portabella, Marcos Portal, Gerard Chaparro, David Spatafora, Luciana Rossato |
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Pablos, Miriam Vall-llossera, Mercè Piles, María Camps, Adriano González-Haro, Cristina Portabella, Marcos Portal, Gerard Chaparro, David Spatafora, Luciana Rossato Assessment of different SMOS Level 3 soil moisture products |
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Pablos, Miriam Vall-llossera, Mercè Piles, María Camps, Adriano González-Haro, Cristina Portabella, Marcos Portal, Gerard Chaparro, David Spatafora, Luciana Rossato |
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Pablos, Miriam |
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Assessment of different SMOS Level 3 soil moisture products |
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Assessment of different SMOS Level 3 soil moisture products |
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Assessment of different SMOS Level 3 soil moisture products |
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Assessment of different SMOS Level 3 soil moisture products |
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Assessment of different SMOS Level 3 soil moisture products |
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assessment of different smos level 3 soil moisture products |
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European Space Agency |
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2019-05-13 |
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AT pablosmiriam assessmentofdifferentsmoslevel3soilmoistureproducts AT vallllosseramerce assessmentofdifferentsmoslevel3soilmoistureproducts AT pilesmaria assessmentofdifferentsmoslevel3soilmoistureproducts AT campsadriano assessmentofdifferentsmoslevel3soilmoistureproducts AT gonzalezharocristina assessmentofdifferentsmoslevel3soilmoistureproducts AT portabellamarcos assessmentofdifferentsmoslevel3soilmoistureproducts AT portalgerard assessmentofdifferentsmoslevel3soilmoistureproducts AT chaparrodavid assessmentofdifferentsmoslevel3soilmoistureproducts AT spataforalucianarossato assessmentofdifferentsmoslevel3soilmoistureproducts |
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dig-icm-es-10261-2429522022-10-25T10:57:45Z Assessment of different SMOS Level 3 soil moisture products Pablos, Miriam Vall-llossera, Mercè Piles, María Camps, Adriano González-Haro, Cristina Portabella, Marcos Portal, Gerard Chaparro, David Spatafora, Luciana Rossato European Space Agency’s 2019 Living Planet Symposium, 13-17 May 2019, Milan, Italy The European Space Agency (ESA)’s Soil Moisture and Ocean Salinity (SMOS) mission is the first satellite specifically dedicated to measuring soil moisture (SM) [1]. SMOS was launched in November 2009 and is still in orbit, providing an unprecedented record of L-band brightness temperature (TB) observations at tens of km of spatial resolution (~40 km) with a 3-day revisit time. Since its launch, SMOS has exhibited a successful performance, fulfilling the scientific requirements in terms of both SM and ocean salinity [2]. SMOS as well as the Soil Moisture Active Passive (SMAP) mission have allowed obtaining the most ever accurate SM measurements at global scale [3]. The operational continuity of L-band observations after SMOS and SMAP is now being proposed via the Copernicus Microwave Imaging Radiometer (CIMR) high priority candidate mission [4]. The latest release (v650) of the ESA’s SMOS Level 2 (L2) Soil Moisture User Data Product (SMUDP) has several improvements on the L2 processor [5]. SMOS L2 SMUDP is generated for each orbit at a 15 km Icosahedral Snyder Equal Area (ISEA) 4H9 grid. Due to that, SMOS Level 3 (L3) SM products, which are a composite map of all orbits within the day at a 25 km Equal Area Scalable Earth (EASE)-2 grid, are preferred by research community in some cases to avoid the manipulation difficulties of ISEA. Nevertheless, all SMOS L2 and L3 SM products, and even a higher spatial resolution Level 4 (L4) SM product [6], have demonstrated to be useful for a wide range of scientific and operational applications up to date, being used in predictive hydrological and atmospheric models [7, 8], to monitor flood and drought events [9, 10], to predict wildfire risks [11] and to estimate root zone SM [12]. Nowadays, there are three different available daily SMOS L3 SM products. The first one is a composite of binned data generated by the Centre Aval de Traitement des Données SMOS (CATDS). The SMOS-CATDS L3 SM product is retrieved using a multi-orbit algorithm developed by the Centre d’Etudes Spatiales de la Biosphere (CESBIO) [13]. The second L3 SM product is generated by the Barcelona Expert Centre (BEC). The SMOS-BEC L3 SM product is obtained directly from L2 SMUDP, after applying a filtering based on the Data Quality Index (DQX) parameter and a weighted binning [14]. However, this filtering criterion may be questioned by a general increase of DQX in L2 v650 compared to the previous version (v620) [5]. As an alternative, a filtering based on the retrieval fit quality index, called Chi-Squared (Χi2) parameter, is currently being evaluated. The third L3 SM product is generated by the Institut National de la Recherche Agronomique (INRA) and CESBIO. The SMOS-IC L3 SM product is retrieved with an algorithm that has some simplifications with respect to the official L2 processor, mainly related to the pixel heterogeneity, angle geometry, and vegetation scattering albedo and soil roughness parameters [15]. This study assesses the SMOS-CATDS, SMOS-BEC and SMOS-IC L3 SM products from January 2015 to December 2016. The alternative SMOS-BEC L3 SM filtered by Χi2 (instead of DQX) has also been tested for several thresholds. Different in situ SM networks have been used to validate all possible L3 SM products over several climate types and land covers. Many present and upcoming applications could get benefit of the improvement and refinement of these global SM products. The obtained results and the inferred conclusions will be presented at the conference. References [1] Kerr, Y.K.; Waldteufel, P.; Wigneron, J.P.; Delwart, S.; Cabot, F.; Boutin, J.; Escorihuela, M.J.; Font, J.; Reul, N.; Gruhier, C.; et al. (2010) “The SMOS Mission: New Tool for Monitoring Key Elements of the Global Water Cycle”, Proceedings of IEEE, 98: 666-687. [2] Mecklenburg, S.; Drusch, M.; Kaleschke, L.; Rodriguez-Fernandez, N.; Reul, N.; Kerr, Y.H.; Font, J.; Martin-Neira, M.; Oliva, R.; Daganzo-Eusebio, E.; et al. (2016) “ESA's Soil Moisture and Ocean Salinity mission: From science to operational applications”, Remote Sensing of Environment, 180: 3-18. [3] Kerr, Y.H.; Al-Yaari, A.; Rodríguez-Fernández, N.; Parrens, M.; Molero, B.; Leroux, D.; Bircher, S.; Mahmoodi, A.; Mialon, A.; Richaume, P.; et al. (2016) “Overview of SMOS performance in terms of global soil moisture monitoring after six years in operation”, Remote Sensing of Environment, 180: 40-63. [4] Donlon, C.J. (2018) “Copernicus Imaging Microwave Radiometer (CIMR). Mission Requirements Document”, Technical report ESA-EOPSM-CIMR-MRD-3236, revision 1.5, Mission Science Division, European Space Agency (ESA), Noordwijk, Netherlands. [5] ESA (2017) “Read-me-first note for the release of the SMOS Level 2 Soil Moisture data products”, Technical report, Expert Support Laboratory (ESL) Level 2 Soil Moisture and Array Systems Computing Inc. [6] Portal, G.; Vall-llossera, M.; Piles, M.; Camps, A.; Chaparro, D.; Pablos, M.; Rossato, L. (2018) “A spatially consistent downscaling approach for SMOS using an adaptive moving window”, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 11(6): 1883-1894.. [7] Ridler, M.E.; Madsen, H.; Stisen, S.; Bircher, S.; Fensholt, R. (2014) “Assimilation of SMOS‐derived soil moisture in a fully integrated hydrological and soil‐vegetation‐atmosphere transfer model in Western Denmark”, Water Resources Research, 50: 8962-8981. [8] Leroux, D.J.; Pellarin, T.; Vischel, T.; Cohard, J.M.; Gascon, T.; Gibon, F.; Mialon, A.; Galle, S.; Peugeot, C.; Seguis, L. (2016) “Assimilation of SMOS soil moisture into a distributed hydrological model and impacts on the water cycle variables over the Ouémé catchment in Benin”, Hydrological Earth System Sciences, 20: 2827-2840. [9] Wanders, N.; Karssenberg, D.; de Roo, A.; de Jong, S. M.; Bierkens, M.F.P. (2014) “The suitability of remotely sensed soil moisture for improving operational flood forecasting”, Hydrological Earth System Sciences, 18: 2343-2357. [10] Pablos, M.; Martínez-Fernández, J.; Sánchez, N.; González-Zamora, Á. (2017) “Temporal and Spatial Comparison of Agricultural Drought Indices from Moderate Resolution Satellite Soil Moisture Data over Northwest Spain”, Remote Sensing, 9:1168. [11] Chaparro, D.; Vall-llossera, M.; Piles, M.; Camps, A.; Rüdiger, C.; Riera-Tatché, R. (2016) "Predicting the Extent of Wildfires Using Remotely Sensed Soil Moisture and Temperature Trends," IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 9(6): 2818-2829. [12] Pablos, M.; González-Zamora, Á.; Sánchez, N.; Martínez-Fernández, J. (2018) “Assessment of Root Zone Soil Moisture Estimations from SMAP, SMOS and MODIS Observations”, Remote Sensing, 10: 981. [13] Al Bitar, A.; Mialon, A.; Kerr, Y.H.; Cabot, F.; Richaume, P.; Jacquette, E.; Quesney, A.; Mahmoodi, A.; Tarot, S.; Parrens, M.; et al. (2017) “The global SMOS Level 3 daily soil moisture and brightness temperature maps”, Earth System Science Data, 9, 293–315. [14] González-Zamora, Á.; Sánchez, N.; Martínez-Fernández, J.; Gumuzzio, Á.; Piles, M.; Olmedo, E. (2015) “Long-term SMOS soil moisture products: A comprehensive evaluation across scales and methods in the Duero Basin (Spain)”, Physics and Chemistry of the Earth, Parts A/B/C, 83-84: 123-136. [15] Fernández-Morán, R.; Al-Yaari, A.; Mialon, A.; Mahmoodi, A.; Al Bitar, A.; De Lannoy, G.; Rodríguez-Fernández, N.; López-Baeza, E.; Kerr, Y.H.; Wigneron, J.P. (2017) "SMOS-IC: An Alternative SMOS Soil Moisture and Vegetation Optical Depth Product", Remote Sensing, 9: 457 2021-06-09T06:00:05Z 2021-06-09T06:00:05Z 2019-05-13 2021-06-09T06:00:06Z póster de congreso http://purl.org/coar/resource_type/c_6670 Living Planet Symposium (2019) http://hdl.handle.net/10261/242952 Sí none European Space Agency |